The purpose of the suction superheater in a cooling system is to protect the compressor from liquid drops, and to increase the evaporating section of the evaporator.
In a cooling plant with direct expansion, the evaporated refrigerant is returned to the compressor through the suction line. A suction superheater is often inserted in the suction line.
The purpose of the suction superheater is to protect the compressor from liquid drops, and to increase the evaporating section of the evaporator.
The top of an evaporator consists of wasteful surface, with the superheating of the gas in the final part of the evaporator causing evaporation. This does not contribute very much to the cooling process. By inserting a suction superheater, it is possible to reduce the wasteful area of the evaporator.
Modern refrigerants such as HFC R134a, R404A, R407C and R507A undergo rapid pressure increases during superheating. Since power consumption increases with pressure differences, the suction superheater is also rated as an energy-saving component in these applications.