基于工业余热的高温空气源耦合热泵循环性能分析  

Performance analysis on high temperature air source heat pump coupling cycle based on industrial waste heat

作　　者：孙健[1] 秦宇 郝俊红[1] 杨勇平[1] SUN Jian;QIN Yu;HAO Junhong;YANG Yongping(State Key Laboratory of New Energy Electric Power,North China Electric Power University,Beijing 102206,China)

机构地区：[1]华北电力大学新能源电力国家重点实验室,北京102206

出　　处：《综合智慧能源》2023年第7期40-47,共8页Integrated Intelligent Energy

基　　金：国家重点研发计划项目(2019YFE0104900);国家自然科学基金项目(52090062);中央高校基本科研业务费专项资金资助项目(2020MS009)。

摘　　要：工业余热的温度分布范围广,常规余热利用方式难以对中低温余热进行有效回收利用,热泵用于回收中低温工业余热具有效率高、能耗低、安全环保等优点。传统的吸收式热泵与压缩式热泵由于热力学循环、工作介质热力性以及压缩机耐温耐压程度的限制导致其只能在窄温域内工作,无法满足工业余热回收背景下的“高制热温度”“宽温域换热”需求。为解决上述问题,提出一种基于吸收-压缩式耦合循环的超高温空气源热泵机组,回收工业废蒸汽(120℃)和空气热量,制取160℃热水(蒸汽)。通过使用工程方程求解器软件(EES)对提出的新型耦合循环进行数学建模和仿真分析,结果表明:最优工况为制取热水温度130℃,室外环境温度30℃时热泵机组热泵性能系数(COP)达到最大值1.600。在制取热水温度160℃下,热泵机组COP最高达1.400。研究的结果拓宽了热泵的工作温度范围,提高了热泵的制热温度。研究结果对热泵用于工业余热回收领域具有一定参考价值,对于提高工业领域一次能源利用率具有重要的研究意义。Industrial waste heat,with a wide range of temperature,can be hardly utilized by conventional ways.Heat pumps can recovery medium and low temperature waste heat effectively,safely and environmental-friendly with low energy consumption.However,traditional absorption heat pumps and compressive heat pumps can only work in a narrow temperature range due to the limitations of thermodynamic cycle,thermodynamic properties of their working mediums and temperature and pressure resistance of their compressors,which cannot meet the requirements of"high heating temperature"and"wide temperature range heat transfer"of industrial waste heat recovery.To solve the problems above,an ultra-high temperature air source heat pump unit based on absorption and compression coupling cycle is proposed.The unit can recover heat from industrial waste steam(120℃)and air to produce 160℃hot water(vapor).The proposed coupling cycle is modelled and simulated by Engineering Equation Solver(EES).The results show that the COP of the heat pump unit peaks at 1.600 under the optimal working condition under which hot water temperature is 130℃and outdoor temperature is 30℃.When the hot water temperature rises to 160℃,the COP of the heat pump unit will be 1.400.The coupling cycle greatly broadens the working temperature range of heat pumps and improves their heating temperature.The study is of certain reference value for heat pumps in industrial waste heat recovery,and can significantly improve the utilization rate of primary energy in industrial field.

关 键 词：吸收式热泵 压缩式热泵 耦合循环 余热回收 空气源热泵 

分 类 号：TK115[动力工程及工程热物理—热能工程]