A field study on frosting suppression for air source heat pumps by adjusting operation strategies of multi-parallel compressors - 文章详情页

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Frosting　is　an　unavoidable　problem　for　air　source　heat　pumps,　especially　in　high　humidity　environment.　It　is　necessary　to　develop　efficient　method　for　frosting　suppression　as　well　as　defrosting.　In　this　study,　frosting　suppression　was　achieved　by　adjusting　the　operation　strategies　of　multi-parallel　compressors.　Field　tests　were　conducted　in　Guiyang,　China,　where　the　average　relative　humidity　in　winter　is　over　80%.　Two　ASHP　units　with　four　fixed-speed　compressors　were　chosen　as　comparing　samples.　Two　operation　strategies　were　compared　for　the　frosting　suppression　performances　of　the　units　at　part　load.　Test　results　shown　that　operation　strategies　can　significantly　affect　the　frosting　suppression　performance　of　the　ASHPs.　By　optimizing　the　operation　strategies,　the　frosting　rate　and　the　frosting-defrosting　loss　efficiency　decreased　by　38　%　~　39　%　and　31　%　~　34　%　thus　leading　to　the　heating　efficiency　and　COP　improving　about　14　%　~　22　%　and　5　%　~　14　%,　respectively.　©　2019　International　Institute　of　Refrigeration.　All　rights　reserved.

关键词：

Defrosting IIR filters Air source heat pumps Refrigeration Compressors Efficiency Pumps

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[ 1 ] [Liang, Shi M.]Department of Building Environment and Facility Engineering, College of Architecture and Civil Engineering, Beijing University of Technology, Beijing; 100124, China
[ 2 ] [Liang, Shi M.]Department of Management Engineering, Qingdao University of Technology, Linyi; 276000, China
[ 3 ] [Zhang, Shi Q.]State Key Laboratory of Air-conditioning Equipment and System Energy Conservation, Zhuhai; 519707, China
[ 4 ] [Wang, Wei]Department of Building Environment and Facility Engineering, College of Architecture and Civil Engineering, Beijing University of Technology, Beijing; 100124, China
[ 5 ] [Wang, Wei]Beijing Key Laboratory of Green Built Environment and Energy Efficient Technology, Beijing University of Technology, Beijing; 100124, China
[ 6 ] [Sun, Yu Y.]Department of Building Environment and Facility Engineering, College of Architecture and Civil Engineering, Beijing University of Technology, Beijing; 100124, China
[ 7 ] [Sun, Yu Y.]Beijing Key Laboratory of Green Built Environment and Energy Efficient Technology, Beijing University of Technology, Beijing; 100124, China
[ 8 ] [Cui, Yi M.]Department of Building Environment and Facility Engineering, College of Architecture and Civil Engineering, Beijing University of Technology, Beijing; 100124, China
[ 9 ] [Cui, Yi M.]Beijing Key Laboratory of Green Built Environment and Energy Efficient Technology, Beijing University of Technology, Beijing; 100124, China
[ 10 ] [Li, Zhao Y.]Department of Building Environment and Facility Engineering, College of Architecture and Civil Engineering, Beijing University of Technology, Beijing; 100124, China
[ 11 ] [Li, Zhao Y.]Beijing Key Laboratory of Green Built Environment and Energy Efficient Technology, Beijing University of Technology, Beijing; 100124, China
[ 12 ] [Deng, Shi M.]Department of Building Environment and Facility Engineering, College of Architecture and Civil Engineering, Beijing University of Technology, Beijing; 100124, China
[ 13 ] [Deng, Shi M.]Department of Building Services Engineering, Hong Kong Polytechnic University, Kowloon, Hong Kong

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