unit 36 Refrigeration applied to A/C

Multicircuit evaporators are equipped with which of the following components?

a refrigerant distributor located at the outlet of the metering device

compressor type that relies on pistons moving up and down within the cylinder

reciprocating compressor

______________________________ compressors are manufactured in 2 basic designs. The stationary vane and the rotary vane

rotary vane

on average each ton of system capacity has the ability to remove approximately how much moisture from the air.

1 quart per ton per hour

3 common evaporator styles are called?

Slant, A, & H

heat leaks into structures 3 different ways...

conduction, infiltration, and radiation

package type a/c units are intended to be located

either the roof or ground level

reciprocating compressors used in residential appliances are most likely

fully hermetic suction gas cooled

the refrigerant that both enters and leaves a properly operating compressor can be described as

high pressure Vapor

Evaporative cooling systems are best suited for which type of climate?

hot and dry climate

what refrigeration lines are field installed on the typical split type a/c system?

liquid line & suction line

a typical multi-head ductless split system is configured with...

liquid line and suction line

the temperature of the evaporator coil is affected by...

only the amount pf air passing through the coil

A/C is often referred to as comfort cooling

true

when sizing and selecting an a/c equipment which of the following must be taken into account?

Moisture content

as refrigerant undergoes the compression process

the pressure and temperature both increase

as refrigerent undergoes the compression process

the pressure and temperature increase

Reciprocating compressors used in a/c are mainly cooled by suction gas and air passing over the shell of the compressor and the maximum suction gas temperature is usually ____ degrees

70 degrees

referring to figure 36.18, the 1% design wet-bulb and dry-bulb temps for Napa, California in the summer are

71 @1%wet bulb summer winter dry bulb 1% is 30

the condensing unit of a split-type a/c is made up of the

Condenser & Compressor

A/C is classified as what type of refrigeration?

High Temperature

the 2 types of heat transfer that are facilitated by the evaporator are...

sensible heat and latent