The Fundamentals
Refrigeration Cycle
Refrigerants
Compressors
Cooling Components
100

A ton of refrigeration

What is 12,000 BTUs / hour? 

100

Compressors cause this to force the flow of refrigerant.

What is a pressure differential?

100

Identified by their grey tanks and yellow shoulders

What is a recovery tank? 

100

If there is an internal failure, it cannot be repaired. 

What is Hermetic Compressor? 

100
Contains a desiccant to absorb water from the refrigerant

What is a Filter Drier?

200

Heat added to a vapor after a change of state...

What is superheat? 

200

How refrigerant leaves the compressor

What is high-temperature, High-pressure vapor?

200

Does not contain any chlorine

What are HFCs (Hydrofluorocarbons)? 

200

This uses an orbiting plate to create a pressure differential.

What is a scroll compressor? 

200

These three pressures exert control over the TXV and flow of refrigerant.

What are the adjusting spring, evaporator pressure, and sensing bulb pressure? 

300

Increases and decreases with the pressure...

What is Boiling Point?

300

Once through the metering device, the refrigerant is this mix of liquid and gas. 

What is 80/20? 

300

The governing agency for the construction and labeling of refrigerant cylinders. 

What is The US DOT? 

300

A piston-based compressor that can be open, semi-hermetic, or hermetic

What is a reciprocating compressor?

300
Essentially a trap to help prevent refrigerant flood back to the compressor. 

What is an accumulator? 

400

14°C, but in America

What is 57.2°F?

400

This remains constant in the evaporator until all refrigerant has changed state. 

What is temperature?

400

This refrigerant is NOT compatible with copper tubing. 

What is Ammonia? 

400

A type of compressor that compresses gas between a male rotor and a female rotor. 

What is a screw compressor? 
400

When evaporators operate at peak efficiency.

What is when all the surface area inside the tubes are exposed to flashing liquid?

500

Head needed to raise 26 lbs. of water 9°.

What is 234 BTUs?

500

This is when subcooling begins

What is when all refrigerant is condensed into a liquid? 

500

A steep price for those who violate EPA regulations

What is $25,000 and/or jail time? 

500

Usually operates with low pressure refrigerants

What is a centrifugal compressor

500

A type of coil developed to eliminate standard round copper or aluminum tubing. 

What are microchannel coils?