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微通道分离式热管数值模拟及性能分析

发表时间:2021-03-31  浏览量:31  下载量:5
全部作者: 陈炎,刘向农,毕笑维,李伟,冯小桃
作者单位: 合肥工业大学汽车与交通工程学院
摘 要: 首先以微通道换热器作为蒸发段和冷凝段,R134a为制冷剂,建立了分离式热管一维稳态换热模型,并利用Matlab进行了模拟计算。然后通过搭建的实验台在不同充注量下进行了实验研究,实验和模拟的性能参数最大相对误差为8.46%. 最后应用稳态模型研究变工况下的系统性能。结果表明:1)系统最佳充液率随室内温度的增加呈上升趋势,本系统最佳充液率范围为80%~100%;2)同一温差下,系统换热量随换热器之间高度差的增加先增大后基本不变;同一高度差下,随着温差的增大,换热量的增加幅度逐渐减小;3)室内温度在40~65℃时,换热量增加迅速,变化曲线与二次曲线相似;室内温度高于65℃时,系统换热量线性增加,而系统阻力增加曲线近似于二次曲线。
关 键 词: 工程热物理;微通道;分离式热管;稳态换热模型;室内温度;充液率
Title: Numerical simulation and performance analysis of micro-channel separate heat pipe
Author: CHEN Yan, LIU Xiangnong, BI Xiaowei, LI Wei, FENG Xiaotao
Organization: School of Automobile and Transportation Engineering, Hefei University of Technology
Abstract: Firstly, a one-dimensional steady-state heat transfer model of the separate heat pipe was established with the micro-channel heat exchanger as the evaporation and condensation section and R134a as the refrigerant, and the simulation calculation was carried out with Matlab. Next, the experimental investigation was carried out under different refrigerant charge through the built experimental platform and the maximum relative error of the experimental and simulated performance parameters was 8.46%. Finally, based on the steady-state model, the system performance was studied under variable operating conditions. The result shows that the optimal refrigerant filling ratio of the system shows an upward trend with the increase of indoor temperature and ranges from 80% to 100%. Under the same temperature difference, the heat transfer of the system increases first with the increase of the height difference between the heat exchangers, and then remains unchanged. Under the same height difference, as the temperature difference increases, the increase of the heat transfer slows down. When the indoor temperature is between 40℃ and 65℃, the heat transfer increases rapidly, and the change curve is similar to the quadratic curve. When the indoor temperature is above 65℃, the heat transfer increases linearly, and the increasing curve of the system resistance is approximately quadratic.
Key words: engineering thermophysics; micro-channel; separate heat pipe; steady-state heat transfer model; indoor temperature; refrigerant filling ratio
发表期数: 2021年3月第1期
引用格式: 陈炎,刘向农,毕笑维,等. 微通道分离式热管数值模拟及性能分析[J]. 中国科技论文在线精品论文,2021,14(1):38-46.
 
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