带补气的罗茨式水蒸汽制冷压缩机工作过程研究.pdf

文档介绍：带补气的罗茨式水蒸汽制冷压缩机
工作过程研究

许树学马国远赵博刘中良
(北京工业大学环能学院,北京 100124)
摘要:对罗茨压缩机的水蒸汽压缩制冷循环工作过程进行了研究,利用变质量系统热力学原理建立了带补
气的罗茨式压缩机水蒸汽压缩过程模型。以理论容积排气量为20 m3/h的压缩机为例进行系统模拟,讨论了
制冷量、输入功率、制冷性能系数EER等性能参数随工况的变化规律。有关结论可指导以水为工质的罗茨
式蒸汽压缩制冷系统的设计与开发。
关键词:制冷,水蒸汽,补气,罗茨压缩机

RESEARCH ON WORKING PROCESS OF WATER PRESSION
REFRIGERATION USING ROOTS PRESSOR WITH VAPOR
INJECTION
Xu Shuxue Ma Guoyuan Zhao Bo Liu Zhongliang
(College of Environment and Energy Engineering, Beijing University of Technology, Beijing 100124, China)
Abstract: The working process of water pression refrigeration system using pressor was
studied, based the variable mass system thermodynamic theory, the mathematical model of pressor
compression process with vapor injection has been built. The system performance, including cooling capacity,
power input and cooling energy efficiency(EER) of one pressor, with ideal discharge volume of 20
m3/h was analysised. The results can provide some useful data for the promising development of water vapor
compression refrigeration system in the future.
Keywords: refrigeration water vapor vapor injection pressor
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0 前言速离心机或多级轴流压缩机比较适宜,对于中小
容量,罗茨式压缩机是水蒸汽压缩式制冷机的较理
水具有潜热大、环保、廉价等其它工质无法比想机型[3]。罗茨压缩机是一种容积式压缩机械,内
拟的优势。早期水曾作为蒸汽压缩式制冷设备的工部不对气体产生压缩,依靠系统的高压气体瞬时回
质使用,近年来,随着环保问题的突出,水再次引流产生升压,容积流量不随蒸发温度的降低而衰
起了制冷技术研究者的兴趣。理论计算出的水蒸汽减。罗茨压缩机的工作原理决定其具有较高的排气
压缩制冷系统可在9以上[1