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Domestic heat pump water heaters have used natural CO2 refrigerants since the initial product launch in 2001. CO2, which has a lower critical temperature than con- ventional HFCs, has good performance for a single-pass temperature-rise heating operation that increases the temperature of the feedwater up to a high degree in one rush, and high-temperature hot water can be obtained. In Japan, CO2 heat pumps that can store hot water (65 °C to 90 °C) are suitable because of the large amount of hot water used in bathtubs, and due to the fact that there are many soft-water areas and scaling due to mineral preci- pitation is unlikely to grow even at high temperatures. In addition, the inverter and control technologies deve- loped for room air conditioners realize stable tapping temperature control even within a temperature increase range of 50 to 80 °C. In addition to performance improvements, functions that improve convenience have been introduced. Ex- amples include a technology that uses microbubbles to improve the effectiveness of hot baths in bathtubs, as well as functions to clean piping using microbubbles, to increase shower pressure and to suppress the growth of bacteria in bathtubs using silver ions. MARKET REPORT Fig. 3: Shipments of Commercial Air Conditioners in Japan. Source: Aggregated from JRAIA statistical data [3] Fig. 4: Shipments of Domestic Heat Pump Water Heaters in Japan. Source: Aggregated from JRAIA statistical data [3] VOL.38 NO 1/2020 HPT MAGAZINE 25PDF Image | Integration of Heat Pumps into the Future Energy
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CO2 Organic Rankine Cycle Experimenter Platform The supercritical CO2 phase change system is both a heat pump and organic rankine cycle which can be used for those purposes and as a supercritical extractor for advanced subcritical and supercritical extraction technology. Uses include producing nanoparticles, precious metal CO2 extraction, lithium battery recycling, and other applications... More Info
Heat Pumps CO2 ORC Heat Pump System Platform More Info
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