制冷学报2024，Vol.45Issue(4)：21-27,7.DOI:10.3969/j.issn.0253-4339.2024.04.021
大滑移温度CO2非共沸工质余热回收热泵热水系统实验研究
Experimental Investigation of Heat Pump Water Heater Using CO2 Zeotropic Mixture with Large Temperature Glide for Waste Heat Recovery
摘要
Abstract
Heat pump technology can be used to upgrade and enhance the quality of low-grade waste heat in production and daily life.Zeotropic mixtures can achieve temperature matching during the heat exchange process of heat pump cycles,which realizes in-depth utilization of waste heat resources.This study conducts an experimental analysis of CO2/R1234yf,CO2/R290,CO2/R600a,and CO2/R32 zeotropic mixtures using a water-source heat pump experimental system.The performances of heat pumps with evaporators and condensers that simultaneously satisfy high-temperature differences were investigated using the zeotropic mixture.Results show that the amount of charge in the zeotropic mixture primarily affects the degree of cycle subcooling,thereby influencing the coefficient of performance(COP)of the system.When the mass composition of CO2/R1234yf is 15％/85％,an optimal refrigerant charge,which corresponds to a COP of 7.66 under the experimental condition(heat source inlet water temperature at 25 ℃,outlet at 5 ℃;heat sink inlet water temperature at 15 ℃,outlet at 45 ℃)is obtained.Furthermore,compared with pure R290,the CO2/R290 working pair exhibits an enhancement of 75.2％in the optimal COP,with a corresponding increase of 107.7％in the volumetric heating capacity(qv).Similarly,the CO2/R1234yf working pair demonstrates an improvement of 27.7％in the optimal COP and an increase of 92.0％in qV.The CO2/R32 working pair exhibits a 15.0％increase in the optimal COP.However,the CO2/R600a working pair exhibited only a 1.7％enhancement in the optimal COP,indicating a relatively low application potential.关键词
热泵/余热回收/非共沸混合物/滑移温度Key words
heat pump/waste heat recovery/zeotrope/temperature glide分类
通用工业技术引用本文复制引用
张涛,吴嘉峰,刘剑,张小松,李明霞..大滑移温度CO2非共沸工质余热回收热泵热水系统实验研究[J].制冷学报,2024,45(4):21-27,7.基金项目
国家自然科学基金(51976033)资助项目.(The project was supported by the National Natural Science Foundation of China(No.51976033).) 本文受中央高校基本科研业务费专项资金项目(2242024K30007)和江苏省自然科学基金项目(BK20230846)资助.(The project was supported by the Fundamental Research Funds for the Central Universities(No.2242024K30007)and the Jiangsu Province Fundamental Research Project(No.BK20230846).) （51976033）
