The component responsible for evaporating in heating or cooling systems is called the evaporator. Chiller systems are composed of four main components to complete the cooling cycle. These components are the compressor, condenser, expansion valve, and evaporator, grouped into four categories. The compressor performs compression, increasing gas pressure and temperature, and then delivers it to the condenser. The hot and high-pressure gas delivered to the condenser condenses there, reducing its pressure somewhat, and is then sent to the expansion valve. The gas conveyed to the expansion valve passes through it, and along with the gas pressure, its temperature is lowered. The gas-liquid mixture exiting the expansion valve is directed to the evaporator, where the refrigerant is completely converted into a gas phase before being returned to the compressor. This completes the gas cycle.