Performance analysis and optimization of a coupling sub-cooler heat pump steam system in a quasi two-stage compression cycle

doi:10.16085/j.issn.1000-6613.2016-2089

Chemical Industry and Engineering Progress ›› 2017, Vol. 36 ›› Issue (07): 2360-2367.DOI: 10.16085/j.issn.1000-6613.2016-2089

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Performance analysis and optimization of a coupling sub-cooler heat pump steam system in a quasi two-stage compression cycle

LIU Bingshen^1,2, GONG Yulie¹, LU Zhenneng¹, QU Yong³, GAO Yifeng³

1 CAS Key Laboratory of Renewable Energy, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, Guangdong, China;
2 University of Chinese Academy of Sciences, Beijing 100049, China;
3 Shandong Oceanair Energy Technology Group Co., Ltd., Yantai 264000, Shandong, China

Received:2016-11-14 Revised:2016-12-28 Online:2017-07-05 Published:2017-07-05

热泵蒸汽系统准两级压缩联合过冷器循环的性能分析及优化

刘炳伸^1,2, 龚宇烈¹, 陆振能¹, 曲勇³, 高一峰³

1 中国科学院广州能源研究所, 中国科学院可再生能源重点实验室, 广东广州 510640;
2 中国科学院大学, 北京 100049;
3 山东欧森纳能源科技集团有限公司, 山东烟台 264000

通讯作者: 龚宇烈,研究员,硕士生导师,研究方向为低品位能源利用及热泵节能技术。
作者简介:刘炳伸(1991-),男,工学硕士,研究方向为制冷空调与热泵。E-mail:liubs@ms.giec.ac.cn。
基金资助:
广东省科技计划（2014A020223001）及科技型中小企业技术创新项目（14C26213701973）。

Abstract

Abstract: A sub-cooler and quasi two-stage compression cycle were introduced for classical heat pump steam system to overcome the negative effects on coefficient of performance (COP) and exhaust temperature of high compression ratio.Simple and revised systems were conducted in a comparative study on their theoretical cycle performance,at the fixed input heat source temperature of 65℃ and condensing temperature range of 115-135℃,using R245fa as working fluid.Then the parameters of economizer (supplement rate of gas,expressed as B) and sub-cooler (sub-cooling rate of heat source water,expressed as A) were optimized to achieve higher COP.The result showed that,the revised system presents better cycle and safety performances,when adopting 0.4 and 0.2 as the typical value for B and A respectively,increasing COP value by 13.5%,cutting exhaust temperature and compression ratio by 1.72℃ and 19.2%,on average.The revised system using optimized parameters of economizer and sub-cooler can achieve a mean increase on COP of 32.36%.

Key words: heat pump steam system, cofficient of performance (COP), quasi two-stage compression, sub-cooler

摘要： 为了克服高压比的运行工况对能效系数（COP）、排气温度等热泵系统循环、安全性能的影响，将准两级压缩联合过冷器的循环方式引入经典的热泵蒸汽系统，在低温热源水输入温度固定为65℃、冷凝温度变化区间为115~135℃的工况下，以R245fa为工质，对经典系统及改进系统进行理论循环性能对比，并以取得更高COP为目标对改进系统的补气参数（补气率B）和过冷器参数（热源水过冷率A）进行优化。结果表明：在所考察的冷凝温度区间内，采用准两级压缩联合过冷器的循环方式下的改进系统取得了更好的循环与安全性能，当B和A的典型值分别取为0.4和0.2时，改进系统COP较经典系统平均提高了13.5%，排气温度与压缩比平均降低了1.72℃与19.2%，采用优化过的补气率和过冷率参数后，改进系统的COP可平均提高32.36%。

关键词: 热泵蒸汽系统, 能效系数, 准两级压缩, 过冷器

CLC Number:

TK123

LIU Bingshen, GONG Yulie, LU Zhenneng, QU Yong, GAO Yifeng. Performance analysis and optimization of a coupling sub-cooler heat pump steam system in a quasi two-stage compression cycle[J]. Chemical Industry and Engineering Progress, 2017, 36(07): 2360-2367.

刘炳伸, 龚宇烈, 陆振能, 曲勇, 高一峰. 热泵蒸汽系统准两级压缩联合过冷器循环的性能分析及优化[J]. 化工进展, 2017, 36(07): 2360-2367.

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Performance analysis and optimization of a coupling sub-cooler heat pump steam system in a quasi two-stage compression cycle

热泵蒸汽系统准两级压缩联合过冷器循环的性能分析及优化

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