Cooling Cycle and Elements

Cooling Cycle and Elements

The refrigeration cycle can be defined as the temperature changes that occur as a result of a refrigerant that first absorbs the heat and then spreads it.

The fluid used in the refrigeration cycle is called the refrigerant.The saturated steam coming out of the evaporator is absorbed by the compressor and compressed to the condensation pressure.Meanwhile, the temperature also increases.The refrigerant in the superheated vapor state enters the condenser and transfers the heat equal to the sum of the heat taken from the evaporator and the work given during the compression process to the external environment.As a result, it becomes saturated liquid and enters the expansion valve.In there, with the increase in friction as a result of the narrowing of the cross-section, the liquid-steam mixture, which is mostly liquid, evaporates by taking heat from the external environment and reaches the compressor inlet.


Compressor: The refrigerant evaporating in the evaporator increases the condensation pressure in the compressor and serves to increase the pressure of the gas in the cooling system. There are 4 types of Compressors; Semi Hermetic Piston Compressor, Semi Hermetic Screw Compressor, Hermetic Piston Compressor, Hermetic Scroll Compressor.

Condenser: The refrigerant condenses in the condenser by dissipating heat to the external environment, and thus the high pressure gas coming from the compressor is converted into saturated vapor and then saturated liquid at constant pressure in the condenser.

Expansion Valve: The pressure of the condensing fluid is reduced to the evaporation pressure in the expansion valve and sent back to the cooler. For this process, expansion valves are used where the cross section is narrowed and the pressure is reduced by friction effect.

Evaporator: It helps the evaporation of the refrigerant fluid and the cooling of the environment by absorbing the heat in the environment to be cooled.