Design For Accessibility: Getting it right from the start
HVAC
1. SHRI RAMSWAROOP MEMORIAL GROUP OF
PROFESSIONAL COLLEGES, LUCKNOW
SEMINAR ON
HEATING, VENTILATION, AND AIR CONDITIONING
SEMINAR GUIDE PREPARED BY
MR. A.K. RATHORE
PANKAJ GAURAV
PROF. P.C. TRIPATHI 1312240141
2. CONTENT
Introduction to HVAC
Need of HVAC
Heating
Ventilation
Air conditioning process
Types of installation
Advantages & Disadvantages
Applications of HVAC
3. WHAT IS HVAC ?
Heating,
Ventilation and
Air Conditioning
4. WHAT DOES IT DO?
HVAC is a basic requirement for your indoor air quality, what you
breathe, temperature, humidity in your house.
So when you hear the term "HVAC" it means the entire air system
of your home.
5. NEED OF HVAC SYSTEM
Improvement of the air quality
Moisture regulation
Maintenance of the constant temperature throughout the year
Energy conservation
6. HEATING
CONVECTION-Collective movement of groups of molecules within fluids
, through diffusion
CONDUCTION -Transfer of internal energy by microscopic diffusion and
collisions of particles within a body due to a temperature gradient.
RADIATION- Electromagnetic waves (EMR) travel through a vacuum or
through matter-containing media
7. VENTILATION
Provided by an air handler and used to control indoor air quality.
Excess humidity, odours, and contaminants can often be controlled via
dilution or replacement with outside air.
Kitchens and bathrooms -ventilation of a building with outside air without
using fans or other mechanical systems. -reduces spread of diseases-
tuberculosis, common cold.
8. AIR CONDITIONING UNIT
An air conditioner is like a refrigerator without the insulated box. It
evaporates a refrigerant, like Freon, to provide cooling. Most Air
Conditioners Have: – A compressor – An expansion valve – A hot
coil (on the outside) – A chilled coil (on the inside) – Two fans – A
control unit
Compressor
Expansion
Valve
Evaporator
Condenser
9. HVAC COMPONENTS
Fans / Blowers
Furnace / Heating unit
Filters
Compressor
Condensing units
Evaporator (cooling coil)
Control System
Air Distribution System
10. COMPRESSOR
Heart of the system.
Responsible for compressing and transferring refrigerant.
Very high volumetric efficiency (almost 98%)
11. CONDENSER
Responsible for heat dissipation. The condenser is
designed to radiate heat.
Hot compressed refrigerant vapour cools at constant
pressure to liquid.
12. EVAPORATOR
An evaporator is a device used to turn the liquid form of a chemical
into its gaseous form while absorbing heat in the process.
liquid passes through a filter before entering the evaporator.
15. ADVANTAGES OF HVAC
Conserves Energy
Regulates Moisture
Air Quality Improvement.
16. DISADVANTAGES OF HVAC
Initial installation cost is high
Primary disadvantage of ductless air conditioners is their cost
17. APPLICATIONS OF HVAC
Thermal storage—isolation of storage tank
“Free cooling” during moderate temperatures
Water source heat pump pre cooler with isolation
Waste heat recovery from condenser water