Performance Analysis of a Coupled System based on Organic Rankine Cycle and Double Effect Absorption Refrigeration for Waste Heat Recovery in Data Center  

作　　者：LI Peng XU Jiaqi WANG Binbin LIU Jianyang ZHAO Wensheng HAN Zhonghe 

机构地区：[1]School of Energy Power and Mechanical Engineering,North China Electric Power University,Baoding 071003,China [2]Hebei Key Laboratory of Low Carbon and High Efficiency Power Generation Technology,North China Electric Power University,Baoding 071003,China

出　　处：《Journal of Thermal Science》2025年第1期188-205,共18页热科学学报(英文版)

基　　金：the support provided by the National Natural Science Foundation of China(No.52106010);the Beijing Natural Science Foundation(3232037);the Fundamental Research Funds for the Central Universities(No.2024MS150)。

摘　　要：During data center operation,it generates a significant volume of low-grade waste heat.To recover waste heat,a coupled system including solar collector,double effect absorption refrigeration and organic Rankine cycle is proposed.The system performance is analyzed in detail.For the organic Rankine cycle,five organic working fluids(R245fa,R245ca,R123,R11,and R113)are selected.R245fa,R113 and R245ca obtain the maximum net power output,thermal efficiency and exergy efficiency,respectively.In the double effect absorption refrigeration system,the evaporation temperature,condensation temperature,and generation pressure affect the COP and exergy efficiency.When the generator pressure is unchanged,the COP increases with increasing evaporation temperature and decreasing condensation temperature.When the COP reaches 1.3,the COP slightly decreases as the evaporation temperature or condensation temperature changes.Similarly,the exergy efficiency of refrigeration systems exhibits the same trend as the COP,and the exergy efficiency maximum value appears at approximately 0.32.A new performance indicator,rPUE,was defined to evaluate the data center power utilization efficiency.The flow distribution ratio and heat source temperature were optimized with multi-objective optimization.When the mass flow distribution rate is 0.6 and the heat source temperature is 441.5 K,rPUE and the total unit production costs of the system obtain the optimal solution.

关 键 词：data center solar heat collection organic Rankine cycle double effect absorption refrigeration waste heat recovery 

分 类 号：TP308[自动化与计算机技术—计算机系统结构] TK115[自动化与计算机技术—计算机科学与技术]