HVAC presentation by EG0uI4

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									               HVAC
Heating, Ventilation, & Air Conditioning

                   By
              Cody Parham
              Greg Nicolas
              Joe Kopiness
             Richard Warren
               Tom O’Neil
             SCOPE

• To explain what HVAC is and how it is used
• To show the different types of HVAC systems
• To list the major materials used in an HVAC
  system
• To show symbols used in the HVAC schematics
• To illustrate the use of symbols in a full
  schematic
            Overview

•   What is HVAC
•   Systems
•   Materials
•   Symbols
•   Full Schematic
•   Acknowledgements
•   Questions
         What is HVAC?

• The term “HVAC system” is used to refer to the
  equipment that can provide heating, cooling,
  filtered outdoor air, and humidity control to
  maintain comfort conditions in a building.

• The American Society of Heating, Refrigerating
  and Air-Conditioning Engineers (ASHRAE) has
  established standards which outline air quality for
  indoor comfort conditions.
Typical HVAC Systems
     Typical HVAC Systems
•   Outdoor air intake
•   Outdoor air control
•   Air filter
•   Heating and cooling coils
•   Humidification equipment
•   Supply fan
•   Ducts
•   Terminal device
•   Return air system
•   Exhaust fans and air outlet
•   Self-contained heating or cooling
    unit
•   Control
•   Boiler
•   Cooling tower
•   Water chiller
           TYPES OF SYSTEMS


1. Residential
2. Commercial
3. Fireplace
        TYPES OF SYSTEMS


Residential-
• Heating
• Cooling
• Single Zone
• Relatively Simple
• One Unit
         TYPES OF SYSTEMS


    Heating-
•   Gas
•   Coal
•   Oil
•   Electric
•   Geothermal
•   Wood
•   Heat Pump
        TYPES OF SYSTEMS


  Heat Pumps-
• Heat pumps extract heat from inside and
  transfers it outside during the summer
• Heat pumps extract heat from the outside
  during the winter and transfer it inside
• Heat pumps contain electric strips to add
  heat to the intake air in winter
       TYPES OF SYSTEMS


  Cooling-
• Heat pumps
• Condensor
          TYPES OF SYSTEMS


    Commercial-
•   Larger
•   Greater need for energy efficient
    structures
•   More complex
•   Multiple Zones
•   Multiple Units
         Types of Systems


  Commercial-
• Many unducted designs
• Small self-contained units sometimes used
• Central control can configure different
  zones for temperature, air mixture, and
  humidity equilibrium
       TYPES OF SYSTEMS


  Fireplace-
• Furnace
• Hearth and chimney
• Wood burning stove
         Materials

                     Plastic
Rubber




          Urethane
           Materials


Aluminum
                       Copper


             Steel
               Symbols - Ducts



-Rectangle -Measurements and direction
of airflow in middle



-Round - Diameter symbol indicates
round duct


-Square – Square symbol indicates
square duct
                 Symbols - Ducts
-Drop (D) or Rise (R) with respect to
airflow




-Flexible Connection – sometimes
canvas is used

 -Insulated Ducts – Interior and exterior
             Symbols –Vents

-Registers – Floor and Wall
         Symbols - Condensers

 -Air-Cooled – Fans blow air
 over tubes containing
 refrigerant




-Coil – Uses a tube coil that contains
refrigerant in conjunction with a fan
               Symbols - Piping

-Flexible hoses and
connectors - Used in hot
water heating




-Flow sight glass – Monitor
flow and condition of liquid
Symbols – Heating and Cooling
                Symbols - Valves

- 3-Way Valve – Either
a mixing or diverting
valve




  -Gate Valve – Commonly
  called a 2-way
      -Used to throttle or
      change flow
                Symbols - Coils
-Heating Coil




-Heat Recovery Coil




-Reheat Coil
              Symbols – Misc.

-Supply Fan – Supplies the air to the
entire system




-Compressor – Compresses liquids
and gases to a smaller volume
Full Schematic
AIR INTAKE




             SANITARY VENT
    Acknowledgements

• Lennox Indoor Comfort Systems
• ACS, Inc.
• http://www.hvacmall.com
• http://www.caddons.com
• Engineering Design and Communication
  by Lockhart and Johnson
• http://www.google.com
• HVAC Systems Design Handbook by
  Haines and Wilson
      Questions

• Does anyone have any questions?

								
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