), 王如竹 上海交通大学 制冷与低温工程研究所, 上海 200240
收稿日期:2020-01-16出版日期:2021-04-28发布日期:2021-04-30通讯作者:徐震原E-mail:xuzhy@sjtu.edu.cn作者简介:安美燕(1996-),女,山东省烟台市人,硕士生,现主要从事工业余热回收方面的研究基金资助:国家自然科学基金资助项目(51606124)A Hybrid Compression-Absorption High Temperature Heat Pump Cycles for Industrial Waste Heat Recovery
AN Meiyan, ZHAO Xinrui, XU Zhenyuan(), WANG Ruzhu Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai 200240, China
Received:2020-01-16Online:2021-04-28Published:2021-04-30Contact:XU Zhenyuan E-mail:xuzhy@sjtu.edu.cn摘要/Abstract
摘要： 针对常规吸收式热泵和压缩式热泵无法兼顾温升与效率的问题,本文提出采用热耦合压缩-吸收式热泵来达到高效高温输出的目的,并根据不同场景需求构建大温升型循环和高温输出型循环.采用R245fa和溴化锂-水溶液作为工质,针对100 ℃以上输出温度,利用Aspen Plus软件建立数学模型并对循环性能进行计算.研究结果显示:在采用大温升型循环回收30~40 ℃余热时,循环最优能效比(COP)可以达到2.58以上;在采用高温输出型循环回收60~70 ℃余热时,循环最优COP可以达到2.83;两种新循环在温升、输出温度和效率上比R245fa压缩式循环均有明显提升.
关键词: 工业余热, 热泵, 压缩, 吸收, 回收, Aspen Plus软件
Abstract: Aimed at the problem that the conventional absorption heat pumps and compression heat pumps cannot take into account the temperature rise and efficiency, this paper proposes the use of a thermally-coupled hybrid compression-absorption heat pump to achieve high-efficiency and high-temperature output. To meet the demands of different scenarios, a large-temperature-lift cycle and a high-temperature-output cycle are constructed. R245fa and lithium bromide aqueous solution are used as working substance. For output temperature above 100℃, Aspen Plus software is used to establish a mathematical model to predict the cycle performance for calculation. The results show that the optimized coefficient of performance(COP) can be 2.58 or higher when the large-temperature-lift cycle is used to recover the waste heat at 30-40℃. When the high-temperature-output cycle is used to recycle waste heat at 60-70℃, the optimized COP of the cycle can reach 2.83. The cycles proposed are more advantageous than the R245fa compression cycle on temperature lift, output temperature, and efficiency.
Key words: waste heat, heat pump, compression, absorption, recovery, Aspen Plus software
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