What type of cooling tower is installed indoors?
Forced draft underflow towers retain the
advantages of what other type of cooling tower?
Air intake louvers and fill are made of what
Cooling towers evaporate approximately how
much water every hour for each ton of
Rotary compressors are used in what type of
Semisealed and sealed compressors have
reduced service requirements because of the
elimination of what part?
What control is temperature sensitive and
controls the operation of the cooling unit?
What device maintains humidity at a
What causes a motor to shut down when a motor
is too hot?
AUTOMOTIVE AIR CONDITIONING
Learning Objective: Understand the basic principles
of operation, maintenance, and repair of automotive air
Vehicle air conditioning is the cooling
(refrigeration) of air within a passenger compartment.
Refrigeration is accomplished by making practical use
of three laws of natureheat transfer, latent heat of
vaporization, and the effects of pressure on boiling or
condensation. The first two laws are discussed in
chapter 6 of this TRAMAN; the practical application
of the third is outlined below.
EFFECT OF PRESSURE ON BOILING OR
The saturation temperature (the temperature
where boiling or condensation occurs) of a liquid or
vapor increases or decreases according to the pressure
exerted on it.
In the fixed orifice tube refrigerant system, liquid
refrigerant is stored in the condenser under high
pressure (fig. 7-35). When the liquid refrigerant is
released into the evaporator by the fixed orifice tube,
Figure 7-35.Air-conditioning refrigeration system-fixed orifice.