Heat transfer characteristics of multi-loop pump-driven loop heat pipe system

doi:10.11949/j.issn.0438-1157.20160835

Abstract

Abstract:

In order to improve the temperature efficiency of the pump-driven loop heat pipe system and explore the technical feasibility of replacement of the single-loop pump-driven loop heat pipe system by the multi-loop pump-driven loop heat pipe system for energy recovery from exhaust air in public buildings, a single-loop and a triple-loop pump-driven loop heat pipe system prototype were developed.An experimental setup was built to contrast the heat transfer characteristics between the single-loop system and the triple-loop system under summer and winter working conditions based on the principle of heat transfer temperature difference uniformity.Results indicated that performance of the triple-loop system was better.Compared with the single-loop system, the temperature efficiency of the triple-loop system was improved by 22.6% under winter working condition when the temperature difference between indoor and outdoor air was 31.9℃ because the temperature difference uniformity was much better, while the temperature efficiency changed little under summer working condition.

Key words: pump-driven loop heat pipe, multi-loop system, temperature efficiency, temperature difference uniformity

摘要：

为提高泵驱动回路热管系统的温度效率，探讨多回路系统替代单回路系统用于空调系统排风能量回收的技术可行性，制作了单回路和三回路泵驱动回路热管系统样机，搭建实验测试平台，研究单回路和三回路系统在夏、冬季运行工况下的换热特性，并基于换热温差均匀性原理进行对比分析。结果表明，相比于单回路系统，三回路系统的性能更优，冬季工况下室内外温差为31.9℃时，换热温差均匀性明显改善，系统温度效率提高22.6%，夏季工况下系统温度效率变化不大。

关键词: 泵驱动回路热管, 多回路系统, 温度效率, 温差均匀性

CLC Number:

TU831.6

DUAN Wei, MA Guoyuan, ZHOU Feng. Heat transfer characteristics of multi-loop pump-driven loop heat pipe system[J]. CIESC Journal, 2017, 68(1): 104-111.

段未, 马国远, 周峰. 多回路泵驱动回路热管系统的换热特性[J]. 化工学报, 2017, 68(1): 104-111.

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