000220963 001__ 220963
000220963 005__ 20180913063834.0
000220963 037__ $$aCONF
000220963 245__ $$aExperimental investigation of a two-stage oil-free domestic Air/Water heat pump prototype powered by an oil-free high-speed twin-stage radial compressor rotating on gas bearings
000220963 269__ $$a2016
000220963 260__ $$c2016
000220963 336__ $$aConference Papers
000220963 520__ $$aDomestic heat pumps have been identified as a key-technology to decrease the energy consumption of the domestic sector, which represents 29% of the world final energy consumption. Space & water heating represent more than two third of the domestic sector energy consumption in many countries. Next generation domestic heat pumps powered by oil-free high-speed radial compressors are expected to (a) be more efficient at rating operating points and in partial loads, (b) to match better the energy demand characteristics, (c) to be more compact and lighter, (d) more silent, and (e) to need lower refrigerant charges. As a first step towards the development of such advanced heat pumps, an oil-free twin-stage Air/Water domestic heat pump prototype powered by an oil-free high-speed twin-stage radial compressor has been developed and tested. The heat pump layout corresponds to a two-stage heat pump cycle with an open economizer. The two main functions of the economizer are (a) to separate the liquid from the gas before the second-stage compressor inlet and offer a proper mixing rocess, and (b) to store the liquid refrigerant not located in the heat exchangers at a given time. This key-component has been coupled with the compression unit and improved through incremental experimental steps. The heat pump driven by an oil-free twin-stage radial compressor has been successfully tested at the rating operating point A-7/W35. The performance reached with the prototype is considered very promising and constitutes a breakthrough in the domain. This article describes the experimental setup, the Operating Point (OP) A-7/W35, the methodology applied for data analysis, followed by the results. The issues limiting the performance of the prototype are also identified and briefly documented.
000220963 700__ $$0242384$$aCarré, Jean-Baptiste$$g189945
000220963 700__ $$0240152$$aFavrat, Daniel$$g105085
000220963 700__ $$0246993$$aSchiffmann, Jürg Alexander$$g103606
000220963 7112_ $$a16 th International Refrigeration and Air Conditioning Conference at Purdue$$cPurdue, West Lafayette, USA$$dJuly 11-14, 2016
000220963 8564_ $$s2194973$$uhttps://infoscience.epfl.ch/record/220963/files/Contribution2219_final.pdf$$yn/a$$zn/a
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000220963 909C0 $$0252044$$pLENI$$xU10315
000220963 909CO $$ooai:infoscience.tind.io:220963$$pconf$$pSTI
000220963 917Z8 $$x198889
000220963 937__ $$aEPFL-CONF-220963
000220963 973__ $$aEPFL$$rREVIEWED$$sPUBLISHED
000220963 980__ $$aCONF