文档介绍：上海交通大学
硕士学位论文
滚动活塞变频压缩机及R22替代工质热力性能研究
姓名:虞琳
申请学位级别:硕士
专业:车辆工程
指导教师:叶春;吴惠贤
20091110
上海交通大学工程硕士学位论文摘要
滚动活塞变频压缩机及 R22 替代工质热力性能研究
摘要
本文根据广州 TCL 空调器(中山)有限公司用户要求开发了一套人
机交互式新型工质热力性质模拟软件,能够处理大温度范围内的热力和
制冷问题,利用该软件可以进行完备的物理性质查询、热力性质计算以
及制冷空调循环多种工况性能分析。计算精度达到了工程要求。
本文针对滚动活塞变频压缩机,详细考虑了泄漏、换热等损失因素,
建立了完善的热力学模型,用实验验证了模型的实用性和可靠性。通过
对变工况和变频的模拟计算,得出了系统冷量、指示功率及各通道泄漏
量随频率的变化规律。分析了气阀的变频响应,指出了压缩机频率变化
的合适范围。在低负荷制冷工况下,低转速高蒸发温度运行,即可保证
冷量和负荷的相互匹配,又有较高的运行效率,显示了变频空调的节能
潜力,为空调系统的最优控制提供了参考和依据。
对比研究了 R22、R407C 和 R410A 的热力性质及制冷循环性能。利
用压缩机详细的热力学模型进行模拟计算,比较了三者的热力性质。原
充注 R22 的压缩机在机器结构基本不变的情况下,直接充灌 R407C 后,
能保持十分相似的热力性能。而 R410A 制冷系统要重新设计。在获得同
样制冷量的情况下,而 R410A 制冷系统的尺寸和工质流量均要减小。
关键词:制冷系统,性能模拟,热力性质
I
上海交通大学工程硕士学位论文 ABSTRACT
THERMODYNAMIC PERFORMANCE STUDIES OF NEW
TYPE REFRIGERANTS AND ROLLING PISTON
PRESSOR
ABSTRACT
This paper develops a suit of man-machine interactive software of the
thermodynamic simulation using new type refrigerants. It can deal with the
thermodynamic and refrigerant problems in a wide range of temperatures. The
computation precision has met the requirement of the practical engineering.
This paper takes into consideration of leakage and heating loss of working fluid and
lubraicating oil in details, the validity and reliability of the simulation model has been
verified by the experiment. Considered different kinds of profiles of the stop, the
bending-stesses of the valve roots pared.
By simulation calculation under variable conditions and at variable speeds, the
changing tendency of the refrigeration capacity, indicated power, and leakage mass of
each path with frequency is dynamic response of the reed valve at variable
speed is analyzed, and appropriate frequency range of pressor is pointed out. In
the case of part load for refrigeration, pressor ought to run at slower speed and
higer evapotating temperature. Because it can not only match l