Experimental investigation of a multi-function heat pump under various operating modes

Heat pumps have been spotlighted as efficient building energy systems because they have great potentials for energy reduction in building air conditioning and reducing CO2 emission. In this study, a multi-function heat pump which has the functions of heating, cooling, and hot water supply was design...

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Bibliographic Details
Published in:Renewable energy 2013-06, Vol.54, p.253-258
Main Authors: Cho, Changyong, Min Choi, Jong
Format: Article
Language:English
Subjects:
air conditioning
Applied sciences
Carbon dioxide
Cooling
COP
Devices using thermal energy
Energy
Energy management
Energy. Thermal use of fuels
Exact sciences and technology
heat
Heat exchangers
Heat pump
Heat pumps
Heating
Hot water
Multi-function
Natural energy
Outdoor
renewable energy sources
Waste heat
water supply
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Summary:Heat pumps have been spotlighted as efficient building energy systems because they have great potentials for energy reduction in building air conditioning and reducing CO2 emission. In this study, a multi-function heat pump which has the functions of heating, cooling, and hot water supply was designed and its performance was investigated according to operating modes. In the cooling-hot water mode, the capacity and COP were enhanced as compared to other modes because the waste heat from the outdoor heat exchanger was utilized as useful heat in the indoor heat exchanger. In the heating and hot water supply mode, the compressor speed should be increased to get appropriate heating and hot water capacities. For all operating modes, the system could be optimized by adjusting the superheat.
ISSN:0960-1481
1879-0682
DOI:10.1016/j.renene.2012.07.017