Docstoc

Wind-Solar Hybrid Project 05307

Document Sample
Wind-Solar Hybrid Project 05307 Powered By Docstoc
					   Multidisciplinary Engineering Senior Design
     Project 05307 Wind Solar Project
                       2005 Critical Design Review
                                      May 13, 2001
                             Joe Jachlewski-ME- Team Leader
                                     Aaron Bailey-ME
                                    Paul Kingsley-ME
                                     Brian Nealis-ME
                                      Matt Rose-ME
                                     Pam Snyder-ME
                                      Chris Wall-ME

                              Customer: Dr. P. Venkataraman
                                  Mentor: Dr. E. Hensel
                                Coordinator: Dr. W. Walter
05703 – Wind-Solar Hybrid Project   Kate Gleason College of Engineering
     Critical Design Review          Rochester Institute of Technology
             5/13/05
                         Project Background
    Recent push for “green” power sources
    NYSERDA Proposal
    The long-term goal of this project is to
     create a marketable wind/solar hybrid power
     generation system that can be applied to
     outdoor lighting and other applications.



05703 – Wind-Solar Hybrid Project
     Critical Design Review         Kate Gleason College of Engineering
             5/13/05                 Rochester Institute of Technology
                           Mission Statement
       The mission of the 2004-2005 Wind Solar
        Team is to design and build a prototype of
        an outdoor lighting system that is powered
       solely by wind and solar energy. The team
       will test the prototype for a minimum of one
       week and evaluate the system performance.
          The prototype will be safe and easy to
                           modify.
05703 – Wind-Solar Hybrid Project
     Critical Design Review         Kate Gleason College of Engineering
             5/13/05                 Rochester Institute of Technology
                          Desired Outcomes
   Safe operation
   Integration of wind turbine, solar panel, a
    light, an energy storage system, support
    structures, and signal processing
    equipment.
   Ability for Turbine interchangeability for
    future testing

05703 – Wind-Solar Hybrid Project
     Critical Design Review         Kate Gleason College of Engineering
             5/13/05                 Rochester Institute of Technology
               Key Requirements & Critical
                      Parameters
     Complete first design
     Build first prototype
     Test prototype for at least a week
     Evaluate system performance
     Provide recommendations for future designs
     Power the light

05703 – Wind-Solar Hybrid Project
     Critical Design Review         Kate Gleason College of Engineering
             5/13/05                 Rochester Institute of Technology
                               Design Process
             Project                       Concept                         Feasibility
            Definition                   Development                      Assessment



                                            Preliminary                   Analysis &
             Build
                                             Prototype                    Synthesis
           Prototype
                                              Design                      of Design


            System
                                                                       Future
          Testing and
                                                                   Recommendations
          Evaluation


05703 – Wind-Solar Hybrid Project
     Critical Design Review         Kate Gleason College of Engineering
             5/13/05                 Rochester Institute of Technology
                Concept Development
                                    Concept A             Concept B          Concept C
           Light source             400W HID Bulb         175 W HID Bulb     10 W LED array
           Percent of               80%                   20%                <1%
           Technologies
           Accommodated
           Maximum Energy           7500 Wh/day           3000 Wh/day        150 Wh/day
           Requirement
           Approximate              11-52 m2              4.4-21 m2          0.22-1.0 m2
           Turbine Swept Area
           Approximate Solar        580-1200 W            230-470 W          11-23 W
           Panel Wattage
           Battery System           Array of 12V SLA      Array of 12V SLA   SLA battery or
                                    batteries             batteries          array of NiMH
                                                                             batteries




05703 – Wind-Solar Hybrid Project
     Critical Design Review         Kate Gleason College of Engineering
             5/13/05                 Rochester Institute of Technology
                       Concept Development




05703 – Wind-Solar Hybrid Project
     Critical Design Review         Kate Gleason College of Engineering
             5/13/05                 Rochester Institute of Technology
                                                                  Feasibility Assessment
                                                    Required size of the                                                                                                  Total power required for each
                                                  power generation system                                                                                                           concept
                               60
                                                                                                                                                                  8000

                                          (A)
                                                                                                                                                                  7000
                               50                                                                                                                                                                    (A)




                                                                                                                              Daily Energy Requirement (Wh/day)
                                                                                                                                                                  6000
 Required Turbine Size (m^2)




                               40
                                                                                                                                                                  5000

                                                                                                                                                                                                                                                                                         Concept A
                                                                                                                  Concept A                                       4000                                                                                                                   Concept B
                               30
                                                                                                                  Concept B                                                                                                                                                              Concept C
                                                                                                                                                                                          (B)
                                                                                                                  Concept C                                       3000
                                        (B)
                               20
                                                                                                                                                                  2000


                                                                                                                                                                  1000
                               10
                                                                                                                                                                                   (C)

                                                                                                                                                                     0
                                        (C)




                                                                                                                                                                                                                              ly
                                                                                                                                                                                                ch


                                                                                                                                                                                                            ril




                                                                                                                                                                                                                                        st
                                                                                                                                                                                      y




                                                                                                                                                                                                                                                              er
                                                                                                                                                                                                                  ay




                                                                                                                                                                                                                                                                           r
                                                                                                                                                                                                                        ne
                                                                                                                                                                          y




                                                                                                                                                                                                                                                                                     r
                                                                                                                                                                                                                                                     r




                                                                                                                                                                                                                                                                        be


                                                                                                                                                                                                                                                                                    be
                                                                                                                                                                                                                                                  be
                                                                                                                                                                                    ar
                                                                                                                                                                         ar
                               0




                                                                                                                                                                                                                             Ju


                                                                                                                                                                                                                                    gu
                                                                                                                                                                                                           Ap




                                                                                                                                                                                                                                                             ob
                                                                                                                                                                                                ar




                                                                                                                                                                                                                  M


                                                                                                                                                                                                                       Ju
                                                                                                                                                                                  u
                                                                                                                                                                     nu




                                                                                                                                                                                                                                                                      em


                                                                                                                                                                                                                                                                                em
                                                                                                                                                                                                                                              em
                                                                                                                                                                                                                                   Au
                                                                                                                                                                                           M
                                                                                                                                                                               br




                                                                                                                                                                                                                                                         ct
                                                                                                                                                                    Ja
                                    0           100   200   300      400      500       600   700     800   900




                                                                                                                                                                                                                                                         O


                                                                                                                                                                                                                                                                   ov
                                                                                                                                                                              Fe




                                                                                                                                                                                                                                                                               ec
                                                                                                                                                                                                                                             pt
                                                                                                                                                                                                                                         Se




                                                                                                                                                                                                                                                                  N


                                                                                                                                                                                                                                                                           D
                                                                  Solar Panel Wattage




05703 – Wind-Solar Hybrid Project
     Critical Design Review                                                                         Kate Gleason College of Engineering
                                                      5/13/05                                        Rochester Institute of Technology
                   Feasibility Assessment
                                    Strengths                                Weaknesses

 Concept A        Light output comparable to                 Power generation system size too large
                  existing outdoor area lighting.             for self-contained design.
                                                              Cost of power generation and storage
                                                              exceeds budget.
 Concept B        Light output comparable to                 Power generation system size too large
                  existing outdoor area lighting.             for self-contained design.
                                                              Cost of power generation and storage
                                                              exceeds budget.
 Concept C        Power generation system size lends Expected light output less than existing
                  itself to self-contained design.    outdoor area lighting.
                  Cost of power generation system
                  and storage within budget.
                                       Concept C was selected for
                                            further design.
05703 – Wind-Solar Hybrid Project
     Critical Design Review            Kate Gleason College of Engineering
             5/13/05                    Rochester Institute of Technology
                        Synthesis of Design
   Light Selection                                            Manufactured by:
  Color: Warm White                                         Light Waves Concepts
  Diameter: 4.80”
                                                                 Par 38 120 LED
  Height: 4.76”
  Current: 76 mA
  Wattage:9.2 W
  Brightness: >43000 LUX
  Nominal Current: 20 mA
  Nominal Voltage: 3.0~3.6 V



05703 – Wind-Solar Hybrid Project
     Critical Design Review         Kate Gleason College of Engineering
             5/13/05                 Rochester Institute of Technology
                                                             Synthesis Of Design
                                                                  Power Generation System
                                                                                     Design Space
                                              2
         Required Turbine Swept Area (m^2)




                                             1.8

                                             1.6
                                                                            Design
                                                                             Point
                                             1.4

                                             1.2

                                              1

                                             0.8

                                             0.6

                                             0.4

                                             0.2
                                                                                                                           *Based on a 20 Watt
                                              0
                                                                                                                           power requirement
                                                   0    10   20   30   40     50     60   70   80   90   100   110   120   and a 15 % efficient
                                                                       Solar Panel Wattage (W)
                                                                                                                           turbine


05703 – Wind-Solar Hybrid Project
     Critical Design Review                                                  Kate Gleason College of Engineering
                                              5/13/05                         Rochester Institute of Technology
                        Synthesis of Design
   Solar Panel Selection
  Model #: BP SX 10
  Maximum power: 10 W
  Warranted power: 9 W
  Voltage at maximum power: 16.8 V
  Open-circuit voltage: 21.0 V
  Current at maximum power: 0.59A
  Short-circuit current: 0.65 A
  12 year Warranty for 90% output




05703 – Wind-Solar Hybrid Project
     Critical Design Review         Kate Gleason College of Engineering
             5/13/05                 Rochester Institute of Technology
                        Synthesis of Design
  Wind Turbine Design
        – Savonius Turbine
        – 1.46 m2 swept area
        – Assuming 15 % efficiency,
          theoretical 13 Watt
          mechanical power
          production
        – Two-stage, gapless,
          constructed with 0º/90º
          woven E-glass and epoxy
        – PVC central shaft
                                                      *A tubular rib was added to increase the stiffness
                                                      of the top and bottom plates


05703 – Wind-Solar Hybrid Project
     Critical Design Review         Kate Gleason College of Engineering
             5/13/05                 Rochester Institute of Technology
                                           Analysis of Turbine
  1                                                                                                 1
  NODAL SOLUTION                                                                                    NODAL SOLUTION
  SUB =1                                                                              MAY 6 2005                                                                                                        MAY 6 2005
                                                                                                    STEP=1
  TIME=1                                                                                 10:36:49                                                                                                          10:49:42
                                                                                                    SUB =1
  UZ       (AVG)                                                                                    TIME=1
  RSYS=0                                        MX                                                  UZ       (AVG)
  DMX =14.679                                                                                       RSYS=0
  SMN =-.003322                                 X        Y                                          DMX =.756855                                        X       Y
  SMX =14.679                                                                                       SMN =-.878E-03
                                                     Z                                              SMX =.756853                                            Z




                                           MN



                                                                                                                                              MX


                                                                                                                                                                          MN



        -.003322           3.259           6.522                 9.785            13.048                  -.878E-03             .167507             .335892                    .504276             .672661
                   1.628           4.891                 8.154           11.417            14.679                     .083315             .251699               .420084                  .588469             .756853




                   Deflection without                                                                                  Deflection with
                    supporting ribs                                                                                    supporting ribs
                                                                              *Under gravitational loading
05703 – Wind-Solar Hybrid Project
     Critical Design Review                                          Kate Gleason College of Engineering
                       5/13/05                                        Rochester Institute of Technology
                                                       Synthesis of Design
   Generator Selection and                                                                                                                  Current-Torque Calibration

    Calibration                                                                                                                    1.8


                                                                                                                                   1.6


        – Donated by team member                                                                                                   1.4




        – 40 VDC nominal                                                                                                           1.2
                                                                                                                                                                              y = 0.3404x - 0.2608
                                                                                                                                                                                   R2 = 0.9989




                                                                                                                     Current (A)
                                                                                                                                    1


                                                                                                                                   0.8

                                                   Voltage-RPM Calibration                                                         0.6


                               30                                                                                                  0.4


                                                                                                                                   0.2
                               25
                                                                                                                                    0
                                                                                                                                         0   1      2         3           4            5             6

                               20                                                                                                                       Torque (in-lbs)
          Output Voltage (V)




                                                                                           y = 0.0336x
                               15
                                                                                           R2 = 0.9996


                               10
                                                                                                                     *The motor was manufactured by Ametek, and
                                5                                                                                       is currently out of production, so motor
                                                                                                                       specifications were not available from the
                                0
                                    0        100     200   300         400           500       600       700   800
                                                                                                                                      manufacturer.
                                                                 Motor Speed (rpm)




05703 – Wind-Solar Hybrid Project
     Critical Design Review                                                     Kate Gleason College of Engineering
                                        5/13/05                                  Rochester Institute of Technology
                        Synthesis of Design
     Energy storage                                      Electrical Conditioning
        – Minnkota Sealed Lead Acid Dual                    – 12VDC to 120VAC inverter
          Purpose                                              (purchased)
        – Nominal Voltage: 12 Volts                         – DC step up circuit
        – Capacity: 72 Ah (at 20 hr rate)                   – DC voltage leveling charge pump
        – Recommended charging                                 was purchased for charging the
          voltage: 12.4 Volts                                  SLA battery.
        – Internal Resistance: 0.17 Ohms
        – Supply power to the light for 3-5
          days




05703 – Wind-Solar Hybrid Project
     Critical Design Review         Kate Gleason College of Engineering
             5/13/05                 Rochester Institute of Technology
        Analysis and Synthesis of Design
                                                           Support Structures
   Wood Post                                                                  Stationary Shaft
        – 6”x6”x16’ Pressure treated                                                – 2” Aluminum Rod Stock
          lumber                                                                    – 6’ long
        – safety factor of 3.3                                                      – safety factor of 4.60
  Wind Speed = 74 mph



                                                     d = 15’ = 4.57m
                                                                                Wind Speed
                                                                                = 74 mph

                                                            x-section
                                                     s = 5.5” = 0.140m                 32 nPstag As h
                                                                                 D3                           Max Stress
     Max Stress = 20.7 Mpa                                      s                            S y             = 47.17 MPa




       m ax 
               Mc
                  
                           1
                            2             
                                 airV 2 As d  s 2 
                                                          20 .7 Mpa
                                         4
                I                      s
                                       12
05703 – Wind-Solar Hybrid Project
     Critical Design Review                                Kate Gleason College of Engineering
              5/13/05                                       Rochester Institute of Technology
                               Synthesis of Design
   Drive Train
        – 1:1 Gear Ratio Selection
               To maximize efficiency of the turbine

                                    Gears                                   Stationary
                       Chain                                                Shaft



                                                                           Rotating
                                                                           Bearing Collar
                       Generator
                       Adaptor

                                                                            Stationary
                                                                            Shaft Mount


                       Generator
                       Mount
                                                     Chain
                                                     Tensioner


05703 – Wind-Solar Hybrid Project
     Critical Design Review          Kate Gleason College of Engineering
             5/13/05                  Rochester Institute of Technology
                                    Final Design
   Installed April 27th and still operating
                                                         Insert video 100_0417




05703 – Wind-Solar Hybrid Project
     Critical Design Review          Kate Gleason College of Engineering
             5/13/05                  Rochester Institute of Technology
          Testing and trouble shooting

      What we observed
      What changes were made
      What we measured
      Desired vs. Actual Outcomes
      What we learned


05703 – Wind-Solar Hybrid Project
     Critical Design Review         Kate Gleason College of Engineering
             5/13/05                 Rochester Institute of Technology
                       What we observed…
   The chain was loose and the gear offset
    was wobbly - the chain fell off the gear
   The top and bottom plates on the turbine
    fractured and caused vibration problems
   Bolts became loose due to the unanticipated
    vibrations
   Power generation from the turbine was
    significantly lower than expected
05703 – Wind-Solar Hybrid Project
     Critical Design Review         Kate Gleason College of Engineering
             5/13/05                 Rochester Institute of Technology
                        What we changed…
    Machined a new gear offset with tighter
     tolerances
    Added a chain tensioner
    Modified the turbine to minimize vibrations
     (with the help of the wind)
    Added Locktite to all bolts and screws
    Disconnected generator from charging
     system as a trouble shooting measure
05703 – Wind-Solar Hybrid Project
     Critical Design Review         Kate Gleason College of Engineering
             5/13/05                 Rochester Institute of Technology
                       What we measured…




05703 – Wind-Solar Hybrid Project
     Critical Design Review         Kate Gleason College of Engineering
             5/13/05                 Rochester Institute of Technology
      Desired Outcomes                                  Actual Outcomes




05703 – Wind-Solar Hybrid Project
     Critical Design Review         Kate Gleason College of Engineering
             5/13/05                 Rochester Institute of Technology
  Conclusions - What we learned…




05703 – Wind-Solar Hybrid Project
     Critical Design Review         Kate Gleason College of Engineering
             5/13/05                 Rochester Institute of Technology
    Recommendations for Improvement
   Generator should be optimized for lower speeds
   Use DC LED array
   Locking nuts should be used in the event of vibrations in
    high winds
   Permanently seal the battery box and generator protective
    case.
   Use a stiffer material for the turbine
   Higher quality anemometer
   Permanent weather proof data logger
   System should be optimized for overall system efficiency,
    not just turbine efficiency

05703 – Wind-Solar Hybrid Project
     Critical Design Review         Kate Gleason College of Engineering
             5/13/05                 Rochester Institute of Technology
      Opportunities for Future Research
   Obtain values for the amount of sunlight incident
    on the ground
   Illuminance map for the LED light source
   Other turbine configurations should be tested.
   Engineering Economics for changing to
    autonomous system
   Predict the life of the system
   Predict the year-round performance
   Develop a comprehensive system model

05703 – Wind-Solar Hybrid Project
     Critical Design Review         Kate Gleason College of Engineering
             5/13/05                 Rochester Institute of Technology
            For a Marketable Product…
   Solar Panel and Turbine size need to be optimized
    based on cost, aesthetics, and size
   Stronger, more durable materials should be used
    for the turbine
   Power generation system incorporated into a
    permanent lighting structure
   Design for Manufacture, Profitability, Maintenance
    and Performance
   A final market must be selected
   Environmental impact study
05703 – Wind-Solar Hybrid Project
     Critical Design Review         Kate Gleason College of Engineering
             5/13/05                 Rochester Institute of Technology
                  Team Accomplishments
   Designed, developed and built a prototype
   The prototype was installed 2 and a half weeks ago, which
    allowed ample time for debugging the systems and
    learning more about the systems.
   Provided accurate documentation of recommendations for
    future development
   Came in under budget and on time - we spent $1600 out of
    the available $3000.
   Completed comprehensive background research that
    would be invaluable for future teams
   Developed a design space representing the tradeoffs
    between turbine size and solar panel size

05703 – Wind-Solar Hybrid Project
     Critical Design Review         Kate Gleason College of Engineering
             5/13/05                 Rochester Institute of Technology
                         Acknowledgements
   Dr. Hensel for his invaluable guidance and mentoring
   Dr. Venkataraman for his initial concept and continued
    input throughout the project
   Dave Hathaway and Steve Kosciol – Machining and Part ordering
    assistance
   John Wellin – assistance with the DAQ system
   Dave Harris and the rest of Facilities Management Services for their
    support throughout the installation process
   Electrical help was provided by Dr. Wayne Walter, Dr. Daniel Phillips,
    and Dr. David Borkholder.
   Joel Slavis from Light Waves Concept, Inc provided the LED arrays at
    a discount.

05703 – Wind-Solar Hybrid Project
     Critical Design Review         Kate Gleason College of Engineering
             5/13/05                 Rochester Institute of Technology
                                    References
  1.      B. F. Blackwell, R. E. Sheldahl, and L.V. Feltz. “Wind Tunnel Performance
          Data for Two- and Three- Bucket Savonius Rotors.” Sandia Laboratories.
          SAND76-0131. (July 1977).




05703 – Wind-Solar Hybrid Project
     Critical Design Review         Kate Gleason College of Engineering
             5/13/05                 Rochester Institute of Technology
                                      Questions




05703 – Wind-Solar Hybrid Project
     Critical Design Review         Kate Gleason College of Engineering
             5/13/05                 Rochester Institute of Technology
    Torque for 1, 2 and 3 stage turbines
                                           700



                                           600



                                           500
                Theoretical Torque (N-m)




                                           400


                                                                                                                            Single Stage
                                           300                                                                              Two Stages Offset 90
                                                                                                                            Three Stages offset 60


                                           200



                                           100



                                             0
                                                  -60   -40   -20   0   20     40      60      80   100   120   140   160


                                           -100
                                                                             Angle (degrees)




05703 – Wind-Solar Hybrid Project
     Critical Design Review                                         Kate Gleason College of Engineering
             5/13/05                                                 Rochester Institute of Technology
                            Cost Assessment
   Budget= $3000
   Epoxy: $140 per m2
   Solar Panels: $5.40 per Watt
   Battery: $0.08 per Watt-Hour

                                                    Cost
                            Concept A               $9820
                            Concept B               $3910
                            Concept C               $189

05703 – Wind-Solar Hybrid Project
     Critical Design Review         Kate Gleason College of Engineering
             5/13/05                 Rochester Institute of Technology
    Power Production Vs. Consumption
                                                          400


                       Power Produced/Consumed (Wh/day)   350


                                                          300


                                                          250                                                                                                Power Produced by 10W
                                                                                                                                                             Solar Panel

                                                          200                                                                                                Power Produced by 15%
                                                                                                                                                             Efficient Turbine, 1m^2
                                                                                                                                                             Swept Area
                                                          150                                                                                                Power Consumed by
                                                                                                                                                             Prototype

                                                          100


                                                          50


                                                            0
                                                                                               ay
                                                                          y




                                                                                        ri l




                                                                                                           ly




                                                                                                                               r




                                                                                                                                                 r
                                                                y




                                                                                                                     st




                                                                                                                                        r
                                                                                  ch




                                                                                                     ne




                                                                                                                                                         r
                                                                                                                                              be
                                                                                                                                        e
                                                                                                                            be




                                                                                                                                                        be
                                                                       ar
                                                                ar




                                                                                                          Ju
                                                                                       Ap




                                                                                                                 gu




                                                                                                                                     ob
                                                                                               M
                                                                              ar




                                                                                                    Ju
                                                                        u
                                                           nu




                                                                                                                          em




                                                                                                                                            em


                                                                                                                                                     m
                                                                                                                Au
                                                                     br

                                                                              M




                                                                                                                                   ct




                                                                                                                                                    e
                                                          Ja




                                                                                                                                 O
                                                                 Fe




                                                                                                                       pt




                                                                                                                                         ov

                                                                                                                                                 ec
                                                                                                                     Se




                                                                                                                                        N

                                                                                                                                                 D



05703 – Wind-Solar Hybrid Project
     Critical Design Review                                                        Kate Gleason College of Engineering
             5/13/05                                                                Rochester Institute of Technology
                              Project Plan for SD2
      March 15, 2005                              April 23, 2005                        April 30, 2005   May 6, 2005           May 13, 2005

           Design and Drawing Completion

              Motor Testing


                          Fabrication and Build


                                                                        Testing


           DAQ System Requirements/Acquisition and
                     Testing Protocols


                         PDR Revision

                                                                   Write Remaining Components of Technical Report (CDR)


                                                                                      Conference Proceedings

                                                                                                         Presentation

                                                                                                                         Website

                                                                                                                Poster




05703 – Wind-Solar Hybrid Project
     Critical Design Review                   Kate Gleason College of Engineering
              5/13/05                          Rochester Institute of Technology
      Power available from the wind for
    various wind speeds and efficiencies.
                Power per Square Meter of Swept Area (W/m^2)   160


                                                               140


                                                               120


                                                               100

                                                                                                                               Betz Limit
                                                               80                                                              35% Efficient
                                                                                                                               15% Efficient
                                                               60


                                                               40


                                                               20


                                                                0
                                                                     0   5   10     15   20    25    30    35   40   45   50
                                                                                         Windspeed (mph)



05703 – Wind-Solar Hybrid Project
     Critical Design Review                                                       Kate Gleason College of Engineering
             5/13/05                                                               Rochester Institute of Technology
Power Produced vs. Power Consumed
                                                   600.0




                                                   500.0
                Power Produced/Consumed (Wh/day)




                                                   400.0


                                                                                                                                Power Produced by Power
                                                                                                                                Generation System
                                                   300.0
                                                                                                                                Power Consumed by Prototype


                                                   200.0




                                                   100.0




                                                     0.0
                                                                                             ly
                                                                                 ay
                                                                   ry
                                                           Fe ry




                                                                          ril
                                                                  ch




                                                                                       ne




                                                                                                    st




                                                                                                                            r
                                                                                                                          er




                                                                                                                            r
                                                                                                             r



                                                                                                                         be

                                                                                                                         be
                                                                                                          be
                                                                                            Ju
                                                                        Ap




                                                                                                   gu
                                                                ua
                                                         a




                                                                                                                       ob
                                                                                M
                                                               ar




                                                                                      Ju
                                                      nu




                                                                                                                      em

                                                                                                                      em
                                                                                                        em
                                                                                                 Au
                                                             br

                                                             M




                                                                                                                 ct
                                                    Ja




                                                                                                             O

                                                                                                                   ov

                                                                                                                   ec
                                                                                                     pt
                                                                                                   Se




                                                                                                                      N

                                                                                                                 D




05703 – Wind-Solar Hybrid Project
     Critical Design Review                                                     Kate Gleason College of Engineering
             5/13/05                                                             Rochester Institute of Technology
                                Post Anchoring
     Strong but temporary
     The base of the post is
      buried 3’ in a 1’ diameter
      hole, which is filled with
      cement.
     Additional guy wires were
      anchored into 5 gallon
      buckets filled with cement
      and buried 1 foot deep
     This provided restraints on
      the pole to ensure that it will
      not fall down.
     After testing the cement
      segments can be dug up and
      the whole system can be
      relocated to the engineering
      test area
05703 – Wind-Solar Hybrid Project
     Critical Design Review         Kate Gleason College of Engineering
             5/13/05                 Rochester Institute of Technology

				
DOCUMENT INFO
Shared By:
Categories:
Tags:
Stats:
views:5
posted:3/3/2012
language:
pages:40