带节流阀CO_2跨临界制冷系统模拟与性能研究  

Simulation and Performance Study of Transcritical CO_2 Refrigeration System with Throttle Valve

作　　者：代乾[1] 杨俊兰[1] 马一太[2] 

机构地区：[1]天津城市建设学院能源与安全工程学院,天津300384 [2]天津大学热能研究所,天津300072

出　　处：《煤气与热力》2013年第2期12-16,共5页Gas & Heat

基　　金：天津市科委应用基础及前沿技术研究计划项目(10JCYBJC08300)

摘　　要：建立带节流阀二氧化碳跨临界制冷系统数学模型,分析数学模型的计算流程。采用试验、模拟方法,对气体冷却器进口冷却水温度、冷却水流量、蒸发器进口冷水温度、冷水流量对系统制冷性能系数、制冷量的影响进行了探讨。降低气体冷却器进口冷却水温度和增大流量有利于提高制冷性能系数、制冷量。增大蒸发器进口冷水温度和流量,有利于提高制冷性能系数、制冷量。The mathematical model for transcrit- ical CO2 refrigeration system with throttle valve is de- veloped, and the calculation process of the mathemati- cal model is analyzed. The influences of inlet cooling water temperature of gas cooler, cooling water flow, in- let chilled water temperature of evaporator and chilled water flow on the refrigeration COP and refrigeration capacity of the system are discussed by tests and simu- lation method. Decreasing the inlet cooling water tem- perature of gas cooler and increasing the cooling water flow are favorable to improve the refrigeration COP and the refrigeration capacity. Increasing the inlet chilled water temperature and chilled water flow of evaporator is favorable to improve the refrigeration COP and the refrigeration capacity.

关 键 词：二氧化碳跨临界制冷系统 节流阀 模拟计算 制冷性能系数 制冷量 

分 类 号：TU995[建筑科学—供热、供燃气、通风及空调工程]