西安交通大学能源与动力工程学院,西安,710049
网络首发:2012-03-10,
纸质出版:2012
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赖芬, 吴裕远, 欧阳前武, 等. 新型部分自复叠热泵的理论研究[J]. 西安交通大学学报, 2012,46(3):15-20.
Theoretical Research on a New Partial Auto-Cascade Heat Pump[J]. 2012, 46(3): 15-20.
提出了一种新型部分自复叠热泵
通过调节复叠率
该热泵可以控制压缩机的排气温度在安全温度(120 ℃)以内
并且把水加热到生活用热水所要求的温度(55 ℃)
同时使热泵达到最高的能效比(COP).采用Matlab调用NIST制冷剂物性数据库Refprop 7.1编程对该热泵进行理论计算
分析了压缩机排气温度和热泵COP的影响因素
确定了最佳运行状态.理论计算结果表明:采用该新型部分自复叠热泵
可使压缩机排气温度下降30 ℃左右
当工质R22质量分数为0.28、冷凝器出口温度为55 ℃时
调节复叠率为0.717
可使压缩机排气温度降低至120 ℃
系统COP达到2.214.
A new partial auto-cascade heat pump(NPACHP)was proposed in this study. By adjusting the auto-cascade ratio
the NPACHP can obtain the safe discharge temperature of the compressor(≤120 ℃)and the required water temperature(55 ℃). The performance of the NPACHP system was calculated with Matlab and refrigerants property database Refprop 7.1 of NIST
and the factors influencing the discharge temperature of the compressor and the COP were analyzed. The best running state of the NPACHP was also determined. The results show that the NPACHP can reduce the discharge temperature of the compressor by about 30 ℃. The compressor discharge temperature can drop to 120 ℃ and the COP can be 2.214 when the auto-cascade ratio of the NPACHP is 0.717
the mass fraction of R22 is 0.28 and the outlet temperature of the condenser is 55 ℃.
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