Experiment and Simulation of Two-stage Compression Air-source Heat Pump Water Heater
Air-source heat pump(ASHP)water heater is a device for hot water in which heat is absorbed from air by heat pump through consuming a little electric.While there are some disadvantages of ordinary single-stage heat pump used in low-temperature environment condition, such as high compression ratio,scarce heating ability and low efficiency.Two-stage compression refrigeration cycle was put forward to use in the air-source heat pump to improve the low temperature adaptability of ASHP in this paper.Combining the single-stage heat pump,a two-stage compression air-source heat pump water heater was designed,and the experimental instrument of prototype had been built up for experimental study.The results of actual tests showed that,compared with single-stage compression cycle, the compression ratio of two-stage cycles was much less, and the heating ability was generally higher. The COP of the two-stage system could keep to about 1.5 while the environment temperature dropped to -20℃. The lumped parameters steady model was built for the two-stage compression air-source heat pump water heater,and the simulated results were good agreement with the measured data.
Air-source heat pump Two-stage compression Water heater Simulation
Wu W B Jin S M
Institute of Air Conditioning and Refrigeration,Nanjing University of Technology,Nanjing 210009,P.R.China
国际会议
上海
英文
770-774
2008-04-05（万方平台首次上网日期，不代表论文的发表时间）