Docstoc

SOLAR PV PUMPS FOR AGRICULTURE AND RELATED USES

Document Sample
SOLAR PV PUMPS FOR AGRICULTURE AND RELATED USES Powered By Docstoc
					Solar Thermal Power –
    Global Status



       Dr. Ashvini Kumar
        Director (Solar)
Solar Energy Corporation of India
          Solar Thermal Energy
• Solar radiation is captured as thermal energy and
  transferred as heat to perform various useful
  applications
• Depending upon operating range of temperatures,
  applications are classified as
   High temperature applications, usually greater than 300
    deg C
   Medium temperature applications, greater than 80 deg C
    and up to 300 deg C
   Low temperature applications, less than 80 deg C
• In India, good progress has been made in the
  development and promotion of solar thermal
  power in last couple of years.
          Solar Thermal Power
               Generation
• Also referred to as CSP (concentrating solar power)
  technologies for power generation
• Technology Options include
   – Parabolic Troughs
   – Linear Fresnel Reflector systems
   – Central Receivers or Power towers
   – Paraboloid dish systems
• Thermal storage and hybridization with conventional
  sources are the biggest strength
• Lot of scope for indigenization, local manufacturing
  and employment generation.
     Parabolic Trough Technology
   Parabolic troughs focus the sun onto a linear receiver.
   The parabolic troughs track the sun and concentrate
    sunlight on to the receiver tubes placed in the trough
    focal line.
   Solar energy is harvested
    to give temperatures up to
    400 deg C.
   Hot liquid is passed
    through a series of heat
    exchangers to generate
    steam, and to drive a
    turbine
   Rankine cycle
    configuration is used for
    power generation
    354MWe           Steam turbines
“SEGS” plants        are the dominant
                     power house
going strong after
20 years
    Linear Fresnel Reflector (LFR)
 Similar to parabolic trough
  technology
 Parabolic trough is sliced into
  individually tracking strips of
  mirrors and installed near the
  ground
 Receiver is stationary and does
  not move with the mirrors as in
  the trough systems, and thus
  provides additional design
  flexibility.
 Has the advantage of lower
  production costs and require least
  amount of land per MW capacity
  among all solar technologies
Linear Fresnel Reflector
      Technology
                           1.5 MW
                           Capacity
                           plant at
                           Murcia,
                           Spain
                           (Air
                           cooling
                           system is
                           used)
Central Receiver Systems
             Uses a field of mirrors called
              heliostats that individually
              track the sun on two axes
              and redirect sunlight to a
              receiver at the top of a tower.
             Sunlight is concentrated
              600–1,000 times, and
              achieves working fluid
              temperatures of 500°–800°C.
             Can use various HTFs
              including steam, air, and
              molten nitrate salts (60%
              sodium nitrate and 40%
              potassium nitrate)
5 MW e-solar Power Plant

                           • 2 towers
                           • 20 acres land
                           • Two 65 ton natural
                             recirculation thermal
                             receivers
                           • Steam temperature= 440
                             C
                           • Steam pressure = 60 bar
                           • 24,000 mirrors
Paraboloid Dish Systems
             These systems use series of
              mirrors arranged in a concave
              plate to focus light onto a
              point

             Usually, a Stirling external
              combustion engine is placed
              at the focal point for
              collecting heat to drive
              pistons by continually
              expanding and condensing
              hydrogen gas

             With gas turbine, Brayton
              cycle may also be used.
  Global Status of Installations
            Operational CSP Capacity
               (Total = 2136 MW)                               Technology Pattern
1800
                                                                         1.5 36.4
1600                                      1532.4                    60              157

1400
                                                                                          Dish Stirling
1200
                                                                                          LFR
1000
                                                                                          ISCC

 800                                                                                      Parabolic Trough

 600                                                   507.5                              Tower

 400                                                             1881.25

 200
       25   1   20 1.5 2.5 17.25 5   20            5
   0
                                      Under Construction
                       CSP Capacity under Construction                    Under Construction -
                              Total = 2648 MW
                                                                       Technology Pattern (in MW)
                1200

                                                              1010
                1000
                                                                              1 12
                                                                     508.9
                                                  776
Capacity (MW)




                 800
                                                                                            dish

                 600                                                                        LFR
                                      470
                                                                                            Parabolic
                 400                                                                        Trough
                                                                                            Tower
                                            250
                                                                                     2125
                 200
                                                        100
                        28.5   13.4
                   0
                       China France India Israel Spain UAE    USA
 Global Efforts for development
  of Large scale CSP projects
• Indi(a)genization
• Must be scalable and replicable
• Must reach early cost competitiveness with the
  conventional power generation and easy
  dispatchability.
• Reduction in water usage as good DNI areas may
  not blessed with water availability
• Building provision of thermal storage
               Thermal Storage
• A storage system enables
   – To negate the variability in system output due to sudden shifts in
     the weather, and
   – extend the range of operation beyond daylight hours

• The power produced throughout the day can be more
  effectively matched with energy demand, therefore
  increasing the value of the power as well as the total
  useful power output of a plant.
   International Developments
• Base load CSP power plant – Gemasolar (Power tower, 19.9
  MW, Spain)
• CSP with storage – up to 7 or 8 hours is considered
  commercial (several in Spain)
• Dry cooling CSP power plant – Puerto Errado I (Linear Fresnel,
  1.5 MW, Spain)
• High operating temperatures – Gemasolar (Power tower, 19.9
  MW, Spain), Priolo Gargallo (Parabolic troughs; 5 MW, Italy)
• Gas hybridization – all Spanish CSP plants (> 800 MW
  operational)
• Coal augmentation – Hassi R’mel (Argelia), Al Kuraymat
  (Egypt), Ain Beni Mathar (Morocco) (parabolic troughs)
• Stirling Engines – Maricopa (1.5 MW, USA), Spain (several
  locations), Portugal (Government CSP demonstration projects
  in several locations)
Large scale CSP projects
           JNNSM: Phase-I
 1,000 MW capacity Grid Solar       Power
  Projects
 A provision of 500 MW capacity of Solar
  Thermal power was made.
 2.5 MW capacity solar tower project
  installed, and 7 projects of aggregate
  capacity     of 470   MW     are   under
  implementation having time for completion
  till May 2013.
 Some pilot projects are proposed, besides
  R&D efforts to develop the test and
  simulation infrastructure.               17
                  Pilot Projects
• Aim is to address issues related to optimization,
  variability of solar resource and storage constraints
  and targetting space-intensity through the use of
  better technologies.
• This means
   • Advanced technology configurations which could lead to
     cost reduction through higher efficiency and CUF, and scale
     effect.

   • Reduction in water consumption and footprint land area

   • Potential for replication in commercial projects soon after
     success of demonstration projects

   • Potential for indigenous manufacturing
Project Configurations and Sites
 Based on recommendations of the stakeholders group and
  site visits by experts, identified pilot projects to have the
  following configurations:
      Project Configuration        Identified sites and Broad
                                         Specifications
   With hybrid cooling        Bhadla (Rajasthan)
   Reduced (<= 30%)           Available Land Area: 150 ha
   consumption of water       Capacity: 40 MW est. CUF: 29% est.
   High operating temperature Charanka (Gujarat)
   (>=500ºC)                  Available Land Area: 140 ha
   Higher efficiency          Capacity: 35 MW est. CUF : 30% est.
   Large thermal storage      Terkuveerapandiyapuram (Tamil Nadu)
   (about 8 hours)            Available Land Area: 160 ha
                              Capacity: 25 MW est. CUF : 45% est.
   Large thermal storage       Nennala (Andhra Pradesh)
   Base load                  Available Land Area: 160 ha
                              Capacity: 20 MW est. CUF : 65% est.
 National Solar Thermal Power Testing,
   Simulation and Research Facility
• 1MWe Solar Thermal Power Plant
  • Research and Demonstration plant
  • Combination of different collector fields giving direct and
    indirect steam generation
  Parabolic Trough Field                  Linear Fresnel Field
 8700 sq. m (3.3 MWth)                  7200 sq. m (2.2 MWth)




             Turbine operating conditions:
        saturated steam at 350 deg. C and 40 bar
 1 MW with 16 hour thermal storage Project at Mount
Abu By WRST with co-funding from Indian and German
                      Ministry
             Solar Tower Technology
- 1 MW(th) Solar power plant based on tower technology
  by M/s Sunborne Energy, Gurgaon, jointly with
  Institutions from USA, Spain and Switzerland.

                                                              Steam
                                         Hot Air             Turbine
             Receiver
                                                                             Generator




                                         Thermal              Steam
                                         Storage             Generator



                                Blower              Blower               `
                                         Cold Air
Heliostats              Tower

				
DOCUMENT INFO
Shared By:
Categories:
Tags:
Stats:
views:1
posted:6/26/2013
language:
pages:23