含润滑油的R1234yf制冷剂物性及对系统性能的影响

发布时间：2018-05-14 06:53

  本文选题：R1234yf + 物性　； 参考：《华北理工大学》2017年硕士论文

【摘要】：基于能源和环保问题,新型制冷剂的开发研究已成为当前制冷行业刻不容缓的任务。新一代绿色制冷剂R1234yf因具备良好的环保性和热力学性质,引起了社会各界的广泛关注。本研究针对制冷剂R1234yf开展了热力学性质和循环性能的研究,为制冷行业进一步研发R1234yf空调制冷技术及热泵产品奠定基础。根据国内外相关文献,筛选出精度较高的R1234yf物性经验关联式,编制了制冷剂R1234yf和含油制冷剂R1234yf/POE的物性程序,并与R134a的物性进行比较,得出了R1234yf和R1234yf/POE的物性变化规律。研究表明,制冷剂R1234yf与R134a具有相似的热物性,微量润滑油对制冷剂R1234yf的物性影响较小。基于热力学第二定律,建立了R1234yf热泵系统?损失模型,进行了热泵系统各部件不同工况下的?损失计算。同时,研究了蒸发温度、冷凝温度及压缩机等熵效率对R1234yf热泵系统?效率的影响。研究表明,R1234yf热泵系统?损失主要为压缩机,回热器的?损失很小,基本可以忽略。提高蒸发温度或降低冷凝温度在一定程度上可减小系统?损失,过热度或压缩机效率的增大可提高系统?效率。选取制冷剂R134a、R32及R1234yf三种工质作为研究对象,编制了热泵性能计算程序,分析了运行参数及中间回热器对热泵循环性能的影响。并设计出与实验系统相匹配的套管换热器,搭建R1234yf热泵系统实验台,测试了不同工况下的热泵循环性能。实验结果表明:系统制冷量、COP0、制热量及COPh均随着蒸发温度的升高而逐渐增大,随着冷凝温度的升高而逐渐减小,实验结果进一步验证了理论分析的准确性。
[Abstract]:Based on the problems of energy and environmental protection, the development and research of new refrigerants has become an urgent task in the refrigeration industry. The new generation green refrigerant R1234yf has attracted wide attention because of its good environmental protection and thermodynamic properties. In this study, the thermodynamic properties and cycle performance of refrigerant R1234yf were studied, which laid a foundation for further research and development of R1234yf air-conditioning refrigeration technology and heat pump products in refrigeration industry. According to the relevant literatures at home and abroad, the empirical correlations of R1234yf physical properties with high precision were screened out, and the physical properties of refrigerant R1234yf and oil-bearing refrigerant R1234yf/POE were programmed. The physical properties of R1234yf and R1234yf/POE were compared with those of R134a, and the physical properties of R1234yf and R1234yf/POE were obtained. The results show that the refrigerant R1234yf and R134a have similar thermal properties, and the microamount of lubricating oil has little effect on the physical properties of refrigerant R1234yf. Based on the second law of thermodynamics, the R1234yf heat pump system is established. Loss model, the heat pump system components under different operating conditions? Loss calculation. At the same time, the effects of evaporation temperature, condensation temperature and compressor isentropic efficiency on R1234yf heat pump system are studied. The effect of efficiency. The research shows that the R1234yf heat pump system? Losses are mainly for compressors, recuperators? The loss is small and negligible. Increasing evaporation temperature or lowering condensation temperature can reduce the system to a certain extent. Loss, superheat or compressor efficiency increases in system? Efficiency. Three kinds of refrigerant R134a / R32 and R1234yf were selected as the object of study. The calculation program of heat pump performance was compiled, and the influence of operating parameters and intermediate regenerator on the performance of heat pump was analyzed. The casing heat exchanger matched with the experimental system was designed and the R1234yf heat pump system test bench was built to test the cycle performance of the heat pump under different operating conditions. The experimental results show that the cooling capacity, heating capacity and COPh of the system increase with the increase of evaporation temperature and decrease with the increase of condensation temperature. The experimental results further verify the accuracy of the theoretical analysis.
【学位授予单位】：华北理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TB64

【参考文献】

相关期刊论文 前10条

1 刘圣春;饶志明;杨旭凯;李叶;;新型制冷剂R1234yf的性能分析[J];制冷技术;2013年01期

2 姜昆;刘颖;姜莎;;新一代制冷剂HFO-1234yf的热物性模型[J];制冷学报;2012年05期

3 孙艳秀;刘旭升;;HFC134a与HFO1234yf用于汽车空调的理论分析[J];低温与超导;2012年06期

4 陈伟;祁影霞;张华;;HCFCs制冷剂替代物研究进展及性能分析[J];低温与超导;2011年12期

5 毛海萍;;R22氟利昂制冷剂的替代[J];压缩机技术;2011年03期

6 杨昭;吴曦;尹海蛟;刘焕卫;;低温室效应HCFCs替代物性能分析[J];制冷学报;2011年01期

7 王博;张伟;马洋博;曾纪s，

本文编号：1886794