Experimental performance analysis of a direct-expansion solar-assisted heat pump water heater with R134a in summer

•A direct-expansion solar-assisted heat pump for domestic hot water supply was built.•A series of experiments were carried out under typical summer weather conditions.•The effects of various parameters on the system thermal performance are analyzed. A direct-expansion solar-assisted heat pump (DX-SA...

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Published inInternational journal of refrigeration Vol. 91; pp. 12 - 19
Main Authors Kong, Xiangqiang, Sun, Penglong, Dong, Shandong, Jiang, Kailin, Li, Ying
Format Journal Article
LanguageEnglish
Published Paris Elsevier Ltd 01.07.2018
Elsevier Science Ltd
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Abstract •A direct-expansion solar-assisted heat pump for domestic hot water supply was built.•A series of experiments were carried out under typical summer weather conditions.•The effects of various parameters on the system thermal performance are analyzed. A direct-expansion solar-assisted heat pump (DX-SAHP) system for domestic hot water supply was built and tested, which mainly consisted of a bare flat-plate collector/evaporator with a surface area of 2.1 m2, a variable-frequency rotary-type hermetic compressor, a hot water tank with the volume of 0.2 m3 surrounded by a micro-channel condenser, and an electronic expansion valve. A series of experiments were carried out to test the system performance under typical summer weather conditions in Qingdao, China. The effects of various parameters, including solar radiation intensity of 258–634 W·m−2, ambient temperature of 28–34 °C, compressor speed of 2500–6000 rpm and final water temperature of 50–60.3 °C, on the system performance are analyzed. Experimental results show that the system coefficient of performance(COP) could be enhanced with the increase of the solar radiation intensity or the ambient temperature, and with the decrease of the compressor speed or the final water temperature.
AbstractList •A direct-expansion solar-assisted heat pump for domestic hot water supply was built.•A series of experiments were carried out under typical summer weather conditions.•The effects of various parameters on the system thermal performance are analyzed. A direct-expansion solar-assisted heat pump (DX-SAHP) system for domestic hot water supply was built and tested, which mainly consisted of a bare flat-plate collector/evaporator with a surface area of 2.1 m2, a variable-frequency rotary-type hermetic compressor, a hot water tank with the volume of 0.2 m3 surrounded by a micro-channel condenser, and an electronic expansion valve. A series of experiments were carried out to test the system performance under typical summer weather conditions in Qingdao, China. The effects of various parameters, including solar radiation intensity of 258–634 W·m−2, ambient temperature of 28–34 °C, compressor speed of 2500–6000 rpm and final water temperature of 50–60.3 °C, on the system performance are analyzed. Experimental results show that the system coefficient of performance(COP) could be enhanced with the increase of the solar radiation intensity or the ambient temperature, and with the decrease of the compressor speed or the final water temperature.
A direct-expansion solar-assisted heat pump (DX-SAHP) system for domestic hot water supply was built and tested, which mainly consisted of a bare flat-plate collector/evaporator with a surface area of 2.1 m2, a variable-frequency rotary-type hermetic compressor, a hot water tank with the volume of 0.2 m3 surrounded by a micro-channel condenser, and an electronic expansion valve. A series of experiments were carried out to test the system performance under typical summer weather conditions in Qingdao, China. The effects of various parameters, including solar radiation intensity of 258–634 W·m−2, ambient temperature of 28–34°C, compressor speed of 2500–6000 rpm and final water temperature of 50–60.3°C, on the system performance are analyzed. Experimental results show that the system coefficient of performance(COP) could be enhanced with the increase of the solar radiation intensity or the ambient temperature, and with the decrease of the compressor speed or the final water temperature.
Author Dong, Shandong
Li, Ying
Kong, Xiangqiang
Sun, Penglong
Jiang, Kailin
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DocumentTitleAlternate Analyse expérimentale des performances d’un chauffe-eau à pompe à chaleur à détente directe assistée par l’énergie solaire fonctionnant au 134a en été
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Keywords Solar assisted heat pump
Eau chaude
Pompe à chaleur assistée par l’énergie solaire
Experiment
Détente directe
Direct expansion
Thermal performance
Hot water
Expérimentation
Performance thermique
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Snippet •A direct-expansion solar-assisted heat pump for domestic hot water supply was built.•A series of experiments were carried out under typical summer weather...
A direct-expansion solar-assisted heat pump (DX-SAHP) system for domestic hot water supply was built and tested, which mainly consisted of a bare flat-plate...
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SubjectTerms Ambient temperature
Direct expansion
Détente directe
Eau chaude
Evaporators
Experiment
Expérimentation
Gas expanders
Heat pumps
Hot water
Microchannels
Performance thermique
Pompe à chaleur assistée par l’énergie solaire
Pumps
Solar assisted heat pump
Solar radiation
Summer
Thermal performance
Water heaters
Water supply
Water tanks
Water temperature
Weather
Title Experimental performance analysis of a direct-expansion solar-assisted heat pump water heater with R134a in summer
URI https://dx.doi.org/10.1016/j.ijrefrig.2018.04.021
https://www.proquest.com/docview/2116839496
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