INNOVATE HOT WATER SUPPLY TECHNOLOGY CONDUCTIVE TO ARRESTING GLOBAL WARMING - DEVELOPMENT AND SIGNIFICANCE OF CO_2 HEAT PUMP WATER HEATER -

摘要

The need to promote energy-saving efforts and reduce CO_2 emissions at home is increasing. Particularly, "hot tap water supply" which accounts for about 35% of residential final energy consumption, now depends largely on direct combustion of fossil fuels such as gas and oil. Against such a background, The Tokyo Electric Power Co., DENSO CORP., and Central Research Institute of Electric Power Industry have jointly developed a CO_2 heat pump water heater for residential use, which uses a natural refrigerant (carbon dioxide) that has very little impact on global warming, and boasts a very high coefficient of performance (COP). After performance evaluation and service tests of a field testing machine, we have made it available in the market for the first time in the world. The CO_2 refrigerant heat pump water heater we have recently developed boasts very high efficiency with a coefficient of performance (COP) of more than 3.0 a year on average. Compared with conventional combustion type water heater, our new water heater saves energy by about 30%.