Lin Yucong, Liu Jinping, Xu Xiongwen, et al. Experimental Research on Air Conditioning System of a Computer Room Based on Refrigerant Pump Pressurization[J]. Journal of refrigeration, 2020, 41(5).
DOI:
Lin Yucong, Liu Jinping, Xu Xiongwen, et al. Experimental Research on Air Conditioning System of a Computer Room Based on Refrigerant Pump Pressurization[J]. Journal of refrigeration, 2020, 41(5). DOI: 10.3969/j.issn.0253-4339.2020.05.083.
Experimental Research on Air Conditioning System of a Computer Room Based on Refrigerant Pump Pressurization
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 ℃and15 ℃
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.