活塞压缩机内R1234yf制冷剂泄漏模拟与测试
发布时间：2018-09-10 16:34
【摘要】：近年来,随着全球温室效应的加重,气候变化日益严峻,开始严重威胁到人类的生命财产安全。而在空调制冷系统中常用的各种制冷剂,则会导致臭氧层破坏和气候变化,并且制冷剂与制冷空调系统的效率以及经济性直接相关,因此新型制冷剂的开发与推广对环境保护与制冷系统至关重要。制冷剂在压缩机运行过程中产生的泄漏会极大影响压缩机的运行效率,故研究制冷剂在压缩机内的泄漏过程,对改善压缩机效率和节约能耗具有重要意义。针对制冷剂R1234yf在活塞压缩机内的工作过程,建立了制冷剂在泄漏通道内数学模型,研究了制冷剂R1234yf的泄漏规律。研究表明,在活塞压缩机的工作过程中制冷剂R1234yf的泄漏主要发生在压缩过程与排气过程。在给定工况下,随着活塞压缩机吸气温度的升高,泄漏通道内制冷剂R1234yf的泄漏速度减小,进而泄漏通道内的泄漏质量也随之减小;随着活塞压缩机吸气压力的上升,泄漏通道内的泄漏质量随之增大;随着活塞压缩机泄漏通道长度的增加,泄漏通道内的泄漏质量随之减小;随着活塞压缩泄漏通道宽度的增加,泄漏通道内的泄漏质量流量也随之增大。通过温度和压力在泄漏通道的耦合计算,研究温度和压力对泄漏通道的形变影响,联合求得活塞压缩机内泄漏通道的变形规律。在给定工况下,随着泄漏通道进口温度的升高,热变形和总变形都会随之增大,且差值也会逐渐增大。通过试验对活塞压缩机内润滑油泄漏进行了测试,为进一步对制冷剂泄漏测试创造条件。
[Abstract]:In recent years, with the aggravation of global greenhouse effect, climate change is becoming more and more serious, which has begun to seriously threaten the safety of human life and property. The development and popularization of refrigerant is very important for environmental protection and refrigeration system.The leakage of refrigerant during the operation of compressor will greatly affect the operation efficiency of compressor.Therefore,it is of great significance to study the leakage process of refrigerant in compressor for improving the efficiency of compressor and saving energy consumption. The mathematical model of refrigerant in the leakage channel is established and the leakage law of refrigerant R1234yf is studied. The results show that the leakage of refrigerant R1234yf mainly occurs in the compression and exhaust processes during the operation of the piston compressor. The leakage speed of refrigerant R1234yf in the leakage channel decreases, and then the leakage quality in the leakage channel decreases; with the increase of suction pressure of the piston compressor, the leakage quality in the leakage channel increases; with the increase of the length of the leakage channel of the piston compressor, the leakage quality in the leakage channel decreases; with the increase of the piston pressure The coupling calculation of temperature and pressure in the leakage passage is carried out to study the effect of temperature and pressure on the deformation of the leakage passage, and the deformation law of the leakage passage in the piston compressor is obtained. With the increase of temperature, the thermal deformation and total deformation will increase, and the difference will also gradually increase. The leakage of lubricating oil in the piston compressor is tested, which will create conditions for further testing of refrigerant leakage.
【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】：TB652
[Abstract]:In recent years, with the aggravation of global greenhouse effect, climate change is becoming more and more serious, which has begun to seriously threaten the safety of human life and property. The development and popularization of refrigerant is very important for environmental protection and refrigeration system.The leakage of refrigerant during the operation of compressor will greatly affect the operation efficiency of compressor.Therefore,it is of great significance to study the leakage process of refrigerant in compressor for improving the efficiency of compressor and saving energy consumption. The mathematical model of refrigerant in the leakage channel is established and the leakage law of refrigerant R1234yf is studied. The results show that the leakage of refrigerant R1234yf mainly occurs in the compression and exhaust processes during the operation of the piston compressor. The leakage speed of refrigerant R1234yf in the leakage channel decreases, and then the leakage quality in the leakage channel decreases; with the increase of suction pressure of the piston compressor, the leakage quality in the leakage channel increases; with the increase of the length of the leakage channel of the piston compressor, the leakage quality in the leakage channel decreases; with the increase of the piston pressure The coupling calculation of temperature and pressure in the leakage passage is carried out to study the effect of temperature and pressure on the deformation of the leakage passage, and the deformation law of the leakage passage in the piston compressor is obtained. With the increase of temperature, the thermal deformation and total deformation will increase, and the difference will also gradually increase. The leakage of lubricating oil in the piston compressor is tested, which will create conditions for further testing of refrigerant leakage.
【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】：TB652
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