Refrigeration Process - Nova Kool 6200 Series Installation Instructions Manual

4 REFRIGERATION PROCESS

Refrigeration simplified. The hardest thing for most people to understand is refrigeration is the removal of
heat. It is not the cooling of something. This then implies that everything has heat. And this is true for
organic objects. ie. Food. There is a lot more to it, but to help understand your refrigerator. (The below is
copied from http://www.air-conditioning-and-refrigeration-guide.com/refrigeration-cycle.html)
We'll discuss the refrigeration cycle using this cycle diagram.
Component #1 is the compressor.
It takes refrigerant vapor in from the low-pressure side of the circuit, and discharges it at a much higher
pressure into the high pressure side of the circuit.
The compressor is the heart of the system; it keeps the refrigerant flowing through the system at specific
rates of flow, and at specific pressures.
The rate of flow through the system will depend on the size of the unit, and the operating pressures will
depend on the refrigerant being used and the desired evaporator temperature.
Component #2 in this refrigeration cycle diagram is the condenser. The red dots inside the piping represent
discharge vapor. The solid red colour represents high pressure liquid refrigerant.
Most air-cooled refrigeration systems are designed so that the refrigerant will condense at a temperature
about 14°C to 17°C above the ambient air temperature around the condenser. Most water-cooled systems
are designed for 24°C to 35°C entering condenser water temperature, with 30°C being the design
temperature. With water cooled condensers, refrigerant should condense at a temperature about 5°C
above leaving condensing water temperature, or 11°C above entering condenser water temperature.
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