储能科学与技术2025，Vol.14Issue(4)：1471-1480,10.DOI:10.19799/j.cnki.2095-4239.2024.0934
液冷数据中心余热驱动的"热泵-跨临界CO2发电"卡诺电池热力性能分析
Thermal performance analysis of a Carnot battery driven by waste heat from a liquid-cooled data center coupled with a heat pump and a transcritical CO2 power cycle
摘要
Abstract
To recover waste heat from liquid-cooled data centers and advance the development of green data centers utilizing renewable energy,this study proposes a Carnot battery system driven by waste heat from liquid-cooled data centers.The system consists of a heat pump and a transcritical CO2 power cycle.A thermodynamic model is developed to evaluate the system's thermal performance under various operating conditions.The results indicate that under design conditions,with an energy storage capacity of 100 kW×5 h and R245fa as the heat pump working fluid,the heat pump achieves a COP of 5.23.Additionally,the power generation efficiency based on heat pump heating reaches 13.28%,and the round-trip efficiency is 67.64%.The study further investigates the effects of key operating parameters—including heat pump evaporator superheat,high and low water tank temperatures,power generation cycle pump outlet pressure,and condensing temperature—on system performance.The findings reveal that round-trip efficiency increases with higher superheat in the heat pump evaporator but decreases as the power generation cycle's hot and cold water tank temperatures,pump outlet pressure,and condensing temperature rise.Notably,when the condensing temperature of the power generation cycle falls below 18℃,round-trip efficiency can exceed 100%.A sensitivity analysis of the system's operating parameters further highlights that the condensing temperature of the power generation cycle has the most substantial impact on round-trip efficiency.关键词
卡诺电池/热泵/跨临界CO2发电/液冷数据中心/余热回收Key words
Carnot battery/heat pump/transcritical CO2 power generation/liquid-cooled data center/waste heat recovery分类
能源科技引用本文复制引用
谭鋆,丁若晨,周晓宇,蔺新星,苏文,徐波,吴宏..液冷数据中心余热驱动的"热泵-跨临界CO2发电"卡诺电池热力性能分析[J].储能科学与技术,2025,14(4):1471-1480,10.基金项目
中国长江电力股份有限公司科研项目(Z152402007). （Z152402007）
