In this presentation, Katsuhiko Harada, the President of Nihon Netsugen Systems, described a CO2 cooling system in development for medium and large size supermarkets. Partnering with German compressor manufacturer GEA Refrigeration Technologies, Nihon's prototype unit includes GEA Bock's CO2 semi-hermetic reciprocating compressors. The prototype unit is a booster system consisting of transcritical and subcritical compressors. One unit can cool down both medium temperature a
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