地表水源热泵毛细管箱式换热器和螺旋盘管换热器的热性能和水力性能对比实验研究

IF 6.4 2区 工程技术 Q1 MECHANICS
Jinfu Zheng , Changpeng Han , Songtao Hu , Qixiang Qin , Jinda Wang , Hui Zhu , Shimin Liang
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引用次数: 0

摘要

前端热交换器的热性能和水力性能对地表水源热泵的能效有很大影响。为了评估毛细管箱式热交换器(CBHE)的性能,我们在不同的管速、传热介质和温度条件下对 CBHE 和传统螺旋盘管热交换器(HCHE)进行了比较研究。比较不仅考虑了传热系数、传热效率和压降等传统指标,还考虑了容积传热系数和两个热-水综合性能参数:具有越大越好特性的修正 Colburn-Fanning 因子比 (JFK) 和具有越小越好特性的耗电量与提取或排出热量比 (EHR)。结果表明,CBHE 的传热系数、传热效率和体积传热系数分别比 HCHE 大 10.1 W/(m2.°C)-25.58 W/(m2.°C)、34%-45% 和 1140 W/(m3.°C)-1416 W/(m3.°C),而其总压降仅为 HCHE 的 15%-21%。此外,CBHE 的 JFK 和 EHR 分别约为 HCHE 的三倍和 11 %-16%。这项研究为选择和设计前端热交换器提供了参考。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Comparative experimental study on the thermal and hydraulic performances of capillary box heat exchanger and helical coil heat exchanger for surface water-source heat pump
The thermal and hydraulic performances of front-end heat exchangers significantly influence the energy efficiency of surface water-source heat pumps. To evaluate the performance of a capillary box heat exchanger (CBHE), a comparative study between the CBHE and a conventional helical coil heat exchanger (HCHE) was conducted under different tube velocities, heat transfer media, and temperatures. The comparison considered not only traditional metrics, such as the heat transfer coefficient, heat transfer efficiency, and pressure drop, but also the volume heat transfer coefficient and two thermal-hydraulic comprehensive performance parameters: the modified Colburn–Fanning factor ratio (JFK) with larger-the-better characteristics and the electricity consumption to extracted or rejected heat quantity ratio (EHR) with smaller-the-better characteristics. The results indicated that the heat transfer coefficient, heat transfer efficiency, and volume heat transfer coefficient of the CBHE were 10.1 W/(m2.°C)–25.58 W/(m2.°C), 34 %–45 %, and 1140 W/(m3.°C)–1416 W/(m3.°C) larger than those of the HCHE, whereas its total pressure drop was only 15 %–21 % of that of the HCHE. Additionally, the JFK and EHR of the CBHE were approximately three times and 11 %–16 %, respectively, those of the HCHE. This study serves as a reference for selecting and designing front-end heat exchangers.
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来源期刊
CiteScore
11.00
自引率
10.00%
发文量
648
审稿时长
32 days
期刊介绍: International Communications in Heat and Mass Transfer serves as a world forum for the rapid dissemination of new ideas, new measurement techniques, preliminary findings of ongoing investigations, discussions, and criticisms in the field of heat and mass transfer. Two types of manuscript will be considered for publication: communications (short reports of new work or discussions of work which has already been published) and summaries (abstracts of reports, theses or manuscripts which are too long for publication in full). Together with its companion publication, International Journal of Heat and Mass Transfer, with which it shares the same Board of Editors, this journal is read by research workers and engineers throughout the world.
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