International Refrigeration and Air Conditioning Conference at Purdue, July 14-17, 2008
CO2 transcritical cycle has been investigated as a potential alternative technology for the application of heat pump water heater. In this study, two tube-in-tube gas coolers in the CO2 transcritical cycle heat pump water heater are studied. Two gas coolers are different on the internal tube. The one has only a single internal tube and the other has three screwed internal
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