R290水循环式空调系统性能优化分析
Performance optimization analysis of R290 water cycle air conditioning system
张凯强 1马国远1
作者信息
- 1. 北京工业大学制冷与低温工程系 北京 100124
- 折叠
摘要
以R290为工质的水循环式空调系统,利用板式换热器将冷量送入室内,工质不入户可以有效解决R290空调的安全问题.通过建立该系统的ε-NTU模型,模拟分析其室内换热器风量与水循环量对系统性能影响,结果表明:循环水的热容流量等于空气的热容流量在多数情况下可以提高换热器温度效率,还提出一种只测量系统温度便可准确控制泵流量的控制方法,可作为水循环空调系统优化设计的依据.
Abstract
The water circulation air conditioning system using R290 as the working fluid effectively solves the safety problem of R290 air conditioning by using plate heat exchangers to deliver the cooling capacity indoors without the working fluid entering the house.This article establishes an ε-NTU model of the system to simulate and analyze the influence of indoor heat exchanger air volume and water circulation on system performance.The results show that the heat capacity flow rate of circulating water is equal to that of air,which can improve the temperature efficiency of the heat exchanger in most cases.A control method that can accurately control the pump flow rate by only measuring the system temperature is also proposed,which can serve as a basis for optimizing the design of water circulation air conditioning systems.
关键词
R290/水循环式空调/板式换热器/ε-NTU方法/流量控制Key words
R290/Water circulation air conditioning/Heat Exchanger/ε-NTU method/Flow control引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据