SMARTREFTM Compressor Cooling Method

Origin:

In response to the Montreal Protocol aimed at reducing ozone depleting substances, CSC Inc. put forward a project in 1995 the purpose of which was to convert existing refrigeration systems to meet future government requirements. HCFC (hydrochlorofluorocarbon) R-22 was to replace other refrigerants that were more toxic for the environment, notably the CFC (chlorofluorocarbon) R-12. R-22 refrigerant is a gas that requires higher compression to reach the same saturation temperature as the R-12. Consequently, compressor systems that operated using R-12 were to be adapted to operate under new more severe conditions, while trying to avoid problems related to overheating compressors. Today, the SMARTREFTM compressor cooling system also offers 100% heat recovery applications.

Advantages:

  • Important energy savings thanks to the possibility of heating an entire building using the heat generated by compressors
  • Meets government ozone protection standards and elimination of compressor overheating

Operation:

The system consists of the circulation of a low-flow refrigerant returning from an evaporator through a heat exchanger to cool down oil returning to the compressors. In the case of compressors of 5 hp and up, compressor oil pumps are required in order to increase oil flow through the heat exchanger.

Characteristics:

  • Limitation of compressor head temperature to 104°C and oil temperature to 49°C
  • Cooling device that includes an oil receiver of 35.6 cm by 15.2 cm, a coil and a pressure reduction valve on the compressor
  • Temperature sensor for compressors of 3 hp and under