内聚焦真空管集热器热泵系统实验研究及分析  

Experimental Study and Exergy Analysis of Internally Focused Vacuum Tube Collector Heat Pump System

作　　者：扶星雨 胡晓微[1] 董胜明 石晨阳 靳茗森 FU Xing-yu;HU Xiao-wei;DONG Sheng-ming;SHI Chen-yang;JIN Ming-sen(School of Mechanical Engineering,Tianjin University of Commerce,Tianjin 300134,China)

机构地区：[1]天津商业大学机械工程学院,天津300134

出　　处：《节能技术》2024年第3期284-288,F0003,共6页Energy Conservation Technology

基　　金：天津市自然科学基金(18JCYBJC90500)。

摘　　要：本文提出了一种集热蒸发器为内聚焦真空管的直膨式太阳能热泵来提升系统性能,并搭建实验台获取实验数据,深入研究不同工况下系统的热力学性能。结果表明,太阳辐照强度对系统性能影响显著,当太阳辐照强度由400 W/m^(2)上升到800 W/m^(2)时,系统COP由4.18升至5.34,集热效率由0.94降至0.67,此时系统损由1175.33 W升高到2290.27 W,系统效率由16.82%下降到11.99%,此外循环水入水温度和环境温度对系统的性能影响远小于太阳辐照强度。集热蒸发器是系统从太阳辐射获取能量的部件,对它的设计优化将有助于改善系统性能。This article proposes a direct expansion solar thermal heat pump with a collector composed of internal concentrating vacuum tubes to enhance system performance.An experimental setup was constructed to obtain empirical data and thoroughly investigate the thermodynamic performance of the system under various operating conditions.The results indicate that solar irradiance significantly affects system performance.When solar irradiance increases from 400 W/m^(2) to 800 W/m^(2),the system's Coefficient of Performance(COP)rises from 4.18 to 5.34,while the collector efficiency decreases from 0.94 to 0.67.At the same time,the system's exergy loss increases from 1175.33 W to 2290.27 W,and the exergy efficiency decreases from 16.82% to 11.99%.Additionally,the impact of circulating water inlet temperature and ambient temperature on system performance is much smaller compared to solar irradiance.The collector serves as the component of the system that extracts energy from solar radiation,and optimizing its design will contribute to improving system performance.

关 键 词：太阳能 全玻璃真空管 COP 集热效率 损 

分 类 号：TH49[机械工程—机械制造及自动化]