巨小平,崔晓龙,邢子文
JU Xiao-ping1,CUI Xiao-long1,2

• 1:广州万宝集团有限公司
• 2:西安交通大学

摘要(Abstract)：

设计并搭建了带回热器的商用跨临界CO2水-水热泵热水器试验系统,并依据相应的国家标准对试验系统进行了多个工况的循环性能试验研究。试验结果表明,名义工况下出水温度85℃时制热COPh值为2.82,最大负荷工况下出水温度65℃时制热COPh值为3.68。冷却水进水温度越高,系统效率越低。同时试验结果表明,CO2作为制冷剂在热泵热水器的应用中更具有优势。
A commercial water source heat pump water heater system using CO2 transcritical cycle with inner heat exchanger was described.A series of experiment for the heat pump were carride out according to the National Standards for commercial heat pump.The experimental results show that the transcritical CO2 heat pump is advantageous over those conventional refrigerants heat pump.On the process of experiment,a heating–COP of 2.82 under nominal working condition and 3.68 under maximum load working condition were achieved for the transcritical CO2 heat pump when the outlet water temperature are 85℃ and 65℃,respectively.Heating-COP decrease with the increase of the inlet cooling water temperature.CO2 is more suitable for the heat pump system than the conventional refrigerants.

关键词(KeyWords)： CO2;跨临界循环;热泵热水器;COP
CO2;transcritical cycle;heat pump;COP

Abstract:

Keywords:

基金项目(Foundation): 国家高技术研究发展计划(863计划)项目(2006AA05Z234);; 中国博士后科学基金项目(20070421115);; 广东省教育部产学研项目(2007B090400033)

作者(Author): 巨小平,崔晓龙,邢子文
JU Xiao-ping1,CUI Xiao-long1,2

参考文献(References)：

• [1]Lorentzen G.Revival of carbon dioxide as a refrigerant[J].Inter.J.Refrig.,1993,17(5):229-301.
• [2]Neksa P.CO2-heat pump system[J].Inter.J.Re-frig.,2002,25(4):421-477.
• [3]Bullard C W,Yin J M,Hrnjak P S.Transcritical CO2mobile heat pump and A/C system experimental andmodel results[R].ACRC&University of Illinois,USA.
• [4]Petter Neksa.CO2heat pump systems[J].Inter.J.Refrig.,2002,25:421-427.
• [5]Richter MR.Experimental results of transcritical CO2heat pump for residential application[J].Energy,2003,28:1005-1019.
• [6]Rin Yun,YHb,Reinhard Radermacher,Convectivegas cooling heat transfer and pressure drop characteris-tics of supercritical CO2/oil mixture in a minichanneltube[J].Inter.J.Heat and Mass Transfer,2007,50:4796-4804.
• [7]Saikawa M,Hashimoto Kobayakawa T.Developmentof prototype of CO2heat pump water heater for residen-tial use[A].Proceeding of the 4th IIR GustavLorentzen conference on natural working fluids[C].2000.51-58.
• [8]Mukaiyama H,Kuwabara.Experimental results and e-valuation of residential CO2heat pump water heater[A].Proceeding of the 4th IIR Gustav Lorentzen con-ference on natural working fluids[C].2000.67-74.
• [9]Mukaiyama H.Development of CO2compressor and itsapplicaition system[A].Proceeding of the 7th Inter-national energy agency heat pump conference[C].2002.1137-1146.
• [10]Endoh K.Instant hot-water supply heat-pump waterheater using CO2refrigerant homes[A].Proceeding ofthe 7th IIR Gustav Lorentzen Conference on NaturalWorking Fluids[C].2006.27-30.
• [11]Pearson S F.Highly efficient water heating system[A].Proceeding of the 7th IIR Gustav Lorentzen Con-ference on Natural Working Fluids[C].2006.23-26.
• [12]Ssikawa M,Hashimktk K,Hasegawa H.Abasic studyon CO2heat pump especially for hot water supply[A].Proceeding of 3nd International Conference on the Useof Non Artificial Substance[C].1997.125-129.
• [13]GB/T21362-2008.商业或工业用及类似用途的热泵热水机[S].