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Rapport 2414173 - October 2007 __________________________________________________________________ technology of the components. Only applications which are marketed or are at a noteworthy stage of development as of year 2007 will be included herein. Industrial applications, air conditioning and mobile air conditioning systems will not be covered. Marketed applications cover : • Tap water heating; • Space heating; • Chilled water for air conditioning; • Commercial refrigeration (positive and negative temperature levels). While the water heating applications have been marketed only in Japan, some commercial refrigeration and air conditioning applications have been commercialized in Europe. During 2007, a few Japanese heat pumps have been installed in Europe (mainly in Sweden) for tap water heating and residential heating. 3.1.The Ecocute system for tap water and heating EcoCute is a brand name that applies to a system which is made by 6 Japanese manufacturers (Denso, Daikin, Sanyo, Matsushita Electric Industrial, Hitachi Appliances, Mitsubishi Electric and Sanden) and marketed under about 14 names. The brand name is derived from the Japanese word "kyuto" which means "hot water". The development of the Ecocute was motivated by the need to produce hot water at a cheaper cost, while operating at reduced electricity tariffs. Sanyo is one of the main manufacturers, releasing an Ecocute unit that produces hot water and heating water. Figure 8 shows the heat pump and associated water tank. Figure 8 : Sanyo Ecocute (www.sanyoaircon.com) It is noteworthy the heat pump looks just like any other traditional air outdoor unit or minichiller on the market. This outdoor unit has neither an integrated water tank, nor a water pump. In addition to the electrical connections, only the water connections are required. The water distribution system inside the house remains the same as with other heating systems. Figure 9 shows the flow diagram of such a unit. The water circulates inside the tank and is heated by the heat pump unit, as required. Water is withdrawn from the tank to feed the radiators or space heating system and then returns to the tank. The tap water from the main __________________________________________________________________________________________ SHERPHA PROJECT - Transcritical R744 Heat Pumps – Technician's Manual 18/63PDF Image | Transcritical R744 (CO2) Heat Pumps 2017
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