Which method can be used to defrost a low temperature evaporator?

Using hot gas from the compressor discharge line is an effective method for defrosting a low temperature evaporator because it utilizes the heat generated by the refrigerant in the system during its compression phase. When hot gas is directed into the evaporator, it raises the temperature of the evaporator coil, causing ice or frost to melt. This method is commonly practiced in refrigeration systems, especially in low-temperature applications, as it helps to maintain efficiency and prevent disruptions in operation caused by frost buildup.

This method helps in ensuring that the refrigerant system continues to operate optimally by preventing excessive ice accumulation, which can impair heat transfer and reduce cooling efficiency. It is an efficient way to manage defrost cycles without requiring additional energy sources or during load conditions, as the system naturally produces this heat when running.

Utilizing hot gas for defrosting is often integrated into the design of refrigeration systems, making it a practical and widely adopted solution in the industry.