Why we say vapour compression cycle than the gas compression cycle?
Answers
At this stage of the Vapor Compression Refrigeration Cycle, the refrigerant is at a lower temperature than its surroundings. Therefore, it evaporates and absorbs latent heat of vaporization. Heat extraction from the refrigerant happens at low pressure and temperature.Refrigerators and heat pumps are essentially the same device; they only differ in their objectives. Reversing the Carnot cycle does reverse the directions of heat and work interactions. A refrigerator or heat pump that operates on the reversed Carnot cycle is called a Carnot refrigerator or a Carnot heat pump.Volume of refrigerant circulated is low. Hence the running cost is low. The temperature at the evaporator can be easily controlled by regulating expansion valve. Latent heat involved in Phase change ensures high value of heat removal, while air refrigeration system has sensible heat only.