REFRIGERANTS


REFRIGERANTS


For each application, a solution is planned using a very low GWP refrigerant. For supermarket systems and the food industry with medium and large capacity systems, CO2


is


an important development area for Hengel to offer proofing chambers and freezing tunnels that can be easily connected to the central refrigeration plant network. However, this solution is limited and cannot meet all the needs of its customers. For smaller equipment, such as plug in units, "the option of A2L refrigerants is more in line with our expectations today," emphasises Dr Younes Matar.


For the past year, Hengel has been working on the Solstice L40X (R455A) solution proposed by the producer Honeywell and distributed by Climalife.


Medium temperature field tests have been carried out for


conservation chambers with a power of 2 to 4 kW and the results are very good. The drop in temperature is very rapid and no installation problems have been noted. Additional tests are currently being carried out on units currently housed.


For equipment operating with semi-hermetic compressors of much higher power, tests are also being carried out. It is necessary to take into account the refrigeration part as a whole, including the temperature glide especially at the evaporator. On the deep-freeze part, the arrival of R455A expansion valves on the market makes the work easier and "we will be able to finalise our range of products and adapt them accordingly in order to be able to go down to an evaporation temperature of -42°C for bi-temperature units -35/-20°C for example," concludes Dr. Younes Matar.


Condair


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March 2021 29


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