新型高温耦合热泵循环性能研究  

Study on the Performance of a Novel High Temperature Coupled Heat Pump Cycle

作　　者：孙健 马世财 霍成 戈志华[1] 杨勇平[1] SUN Jian;MA Shicai;HUO Cheng;GE Zhihua;YANG Yongping(North China Electric Power Universtiy,Energy Power and Thermal Engineering,Beijing 102206,China)

机构地区：[1]华北电力大学能源动力与机械工程学院,北京102206

出　　处：《工程热物理学报》2024年第12期3611-3617,共7页Journal of Engineering Thermophysics

基　　金：中央高校基本科研业务费专项资金资助(No.2020MS009);国家自然科学基金(No.51606061);国家重点研发计划(No.2017YFB0602105)。

摘　　要：高效余热回收利用是实现节能减排的关键途径,近些年能源利用效率优异的热泵技术广泛应用于工业余热回收领域。受限于热泵自身的循环结构、压缩机于工作介质性能,压缩式与吸收式热泵工作温度区间较窄,在工业余热回收场景下难以满足较高制热温度下“大温升”的换热要求。该研究首先对提出的新型高温耦合热泵循环原理进行分析;其次建立了耦合热泵热力学稳态数学模型;针对某化工余热项目设计工况下计算得到在余热进口温度为90℃情况下,耦合热泵可制取115℃的热水,且COP为2.33,分析了耦合热泵循环中压缩式循环冷凝温度、中温余热出口温度及冷却水出口温度对耦合热泵性能的影响,该热泵相比常规热泵技术在较高制热温度工况下可实现“大温差”高效换热,且技术经济性良好,进而具有较好市场应用潜力。Efficient utilization of waste heat is a crucial approach to achieving energy conservation and emission reduction.In recent years,the highly efficient heat pump technology has been widely applied in industrial waste heat recovery due to its excellent energy utilization efficiency.However,the narrow operating temperature range of compression and absorption heat pumps makes it chal-lenging to meet the"large temperature rise"heat exchange requirements in industrial waste heat recovery at higher heating temperatures.Firstly,this paper analyzes the circulating principle of the new high-temperature coupled heat pump.Secondly,it establishes a thermodynamic steady-state mathematical model for the coupled heat pump.According to calculations under the design condi-tions of a chemical waste heat project,when the waste heat inlet temperature is 90℃,the coupled heat pump can produce hot water at 115℃ with a COP of 2.33.The effects of compressed circu-lation condensing temperature,medium temperature waste outlet temperature,and cooling water outlet temperature on the performance of the coupled heat pump cycle are analyzed.Compared with conventional technology,this new high-temperature coupled heat pump can efficiently transfer"large temperature difference"under higher heating temperatures and demonstrates good technical economy potential for market application.

关 键 词：余热回收 压缩式循环 吸收式循环 耦合循环 

分 类 号：TK123[动力工程及工程热物理—工程热物理]