The compressor receives low pressure gas from the evaporator and converts it to high pressure gas through compression , as the name states. As the gas is compressed, the temperature rises. The hot refrigerant gas then flows to the condenser.
What are the 4 cycles of refrigeration?
A refrigeration cycle has four major components: the compressor, condenser, expansion device, and evaporator . Refrigerant remains piped between these four components in the refrigerant loop.
Which cycle is used in refrigeration?
The vapor-compression refrigeration is the most widely used cycle for refrigerators, air- conditioners, and heat pumps.
What is evaporator in refrigeration cycle?
An evaporator is used to turn any liquid material into gas . In this process, heat is absorbed. The evaporator transfers heat from the refrigerated space into a heat pump through a liquid refrigerant, which boils in the evaporator at a low-pressure.
What is the function of compressor?
The purpose of the compressor is to circulate the refrigerant in the system under pressure , this concentrates the heat it contains. At the compressor, the low pressure gas is changed to high pressure gas.
What is gas refrigeration cycle?
Gas Refrigeration Cycle
When the gas is throttled from very high pressure to low pressure in the throttling valve, its temperature reduces suddenly while its enthalpy remains constant . This principle is used in gas refrigeration system.
What is COP formula?
COP (Coefficient of Performance)
The Co-efficient of performance (COP) is an expression of the efficiency of a heat pump. When calculating the COP for a heat pump, the heat output from the condenser (Q) is compared to the power supplied to the compressor (W). COP = |Q| W .
What is the purpose of compressor in refrigerator?
The compressor is the “heart” of a refrigerator. It circulates the refrigerant throughout the system and adds pressure to the warm part of the circuit, and makes the refrigerant hot . It's similar to when you are pumping air into a bicycle tube – you can sense a heat increase in the pump while you compress the air.
How does a refrigerator evaporator work?
The basic function of an evaporator in the refrigerator system is to remove the heat from the water, air, and other substances present in the refrigerator . The evaporators of refrigerator systems act as a heat exchanger which helps in transferring the heat from the substance and make it cool.
What is subcooling in refrigeration system?
The most basic meaning of subcooling is any temperatures below the saturation temperature . Generally, the lowest temperature a condenser can achieve, the better. In other words, the colder the refrigerant is as it flows into the evaporator coil, the more heat it will be able to absorb.
What are the two main functions of a compressor in a refrigeration cycle?
A refrigerator compressor is the center of the refrigeration cycle. It works as a pump to control the circulation of the refrigerant, and it adds pressure to the refrigerant, heating it up .
How does a compressor cool air?
The process of cooling down your air can be a little complicated. For starters, the compressor will move the outside air into the refrigerant. The refrigerant will take in that heat and convert it into colder air . When the air cools down, the liquid refrigerant turns into a heated vapor.
How does a compressor condenser work?
The compressor is housed within the condenser unit and the component that starts the chain reaction cools the refrigerant . It should be noted that heat moves toward cooler areas. When the room temperature air passes through the evaporator unit, heat is eliminated from the air.
What is COP and EER?
COP is a measurement of the energy efficiency of your air-conditioning unit's heating performance. EER is the ratio of a unit's cooling output relative to its input power .
How is EER calculated?
EER stands for Energy Efficiency Ratio. The EER rating for an air conditioner is calculated by dividing the BTU (British Thermal Units) rating by the wattage . For example, a 12,000-BTU air conditioner that uses 1,200 watts has an EER rating of 10 (12,000/1,200 = 10).
What is COP energy efficiency?
The coefficient of performance or COP (sometimes CP or CoP) of a heat pump, refrigerator or air conditioning system is a ratio of useful heating or cooling provided to work (energy) required . Higher COPs equate to higher efficiency, lower energy (power) consumption and thus lower operating costs.
