Residential Hvac/R Systems

HAC 200
Applied Heating

Residential HVAC/R Systems

Presented by:

July 20, 2010

This paper is submitted in partial fulfillment of the Associate of Science Degree in Electronic Systems and HVAC program.

Presented to:

In the HVAC/r field there are 2 main types of systems,

Commercial and Residential.   While both are equally important and

valuable I will be talking about Residential systems.   In this paper,

we will concentrate on how a Residential system works and the

different types of Residential air conditioning systems how they

are comprised by energy source.

The most common central residential A/C system

incorporates an indoor air handler unit which draws building

air through return ducts from the living space, cools it by moving

the air across an evaporator coil, and expels cooled and

dehumidified air back into the living area through supply ducts.

Liquid refrigerant is released into the interior of the evaporator,

changing its state from liquid to gas, cooling the evaporator coil,

which in turn cools and dehumidifies air which is blown across the

coil.   Refrigerant used to cool the evaporator coil runs in

independent piping from the evaporator coil to a compressor and

condenser unit outside where the refrigerant is re-pressurized,

cooled, and returned back to the evaporator coil as a liquid.

Air-cooled air conditioner systems refer to the use of air to

cool the compressor and the condenser coil.   These split systems

usually have an evaporator cooling coil installed indoors to work

along with the blower and duct system which may also be sitting atop

a heating furnace.   The outside half of the equipment contains the

compressor and condenser coil.   Refrigerant moving through the system

as a gas or liquid moves heat from inside the building (at the

evaporator coil in an air handler) to outside the building at the

condenser unit's condensing coil.   Water...