基于氟泵增压的机房空调系统性能实验研究

Experimental Research on Air Conditioning System of a Computer Room Based on Refrigerant Pump Pressurization

为解决蒸气压缩式制冷空调系统在低冷凝温度时供液不足以及寒冷季节自然冷能利用率低的问题,本文设计了氟泵增压空调系统并实验研究了系统运行特性。该系统可以在夏季炎热季节、过渡季节和冬季寒冷季节分别以蒸气压缩、氟泵增压、单氟泵驱动3种模式运行。结果表明:实验中使用毛细管/电子膨胀阀的传统压缩蒸气制冷系统分别会在室外温度低于25℃/15℃时发生供液不足、制冷量下降的问题,使用氟泵增压系统在室外温度为-5~25℃的工况范围内均可实现100%以上的额定制冷量,COP可达3.96~6.25,满足过渡季节工况下的运行需求。室外温度低于-5℃时,使用单氟泵驱动可满足额定制冷量,且COP>19。

To solve the problems involving insufficient liquid supply in the low-condensation temperature of the vapor compression air-conditioning refrigeration system and the low utilization rate of natural cold energy in the cold season,an air-conditioning system based on refrigerant pump boosting was designed,and the operating characteristics of the system was experimentally studied in this paper.The system can be operated in three modes:vapor compression,refrigerant pump boost,and single refrigerant pump drive in hot summer,transitional season,and cold winter.The results show that the traditional compression vapor refrigeration system using a capillary tube and an electronic expansion valve in the experiment suffers from insufficient liquid supply and reduced cooling capacity when the outdoor temperature is below 25℃and 15℃,respectively.Furthermore,it can achieve a rated cooling capacity of more than 100%and a COP of 3.96 to 6.25 in the working conditions with an outdoor temperature of 25℃to-5℃.This satisfies the operating requirements of the transition season.When the outdoor temperature is lower than-5℃,the use of a single refrigerant pump drive can satisfy the rated cooling capacity and exhibit a COP of more than 19.