由于我国西北地区冬季气温通常在零度以下,光伏集热器的集热管可能会结冰.为此,开发了一种微热管技术,通过将光伏板改装到微热管PV/T系统中来调节工作温度.测试将于 2021年12月1日至 2022年2月28日,每天 9:30 开始,16:30 停止.将冬至日2021年12月24日作为典型天,典型天平均光热效率、平均光电效率和平均总效率分别为 26.4%、12.8%和 39.4%.微热管中使用的工作介质是 R141b,沸点相比丙酮更低,系统效率更高,并根据实验数据做了微热管PV/T表面温度的拟合公式,平均误差为 7.1%.该实验研究旨在为微热管 PV/T 提供科学基础和工程参考,并可为未来带来更高效的太阳能应用.
Due to winter temperatures typically below zero degrees Celsius in the northwest region of Chi-na,the collector tubes of photovoltaic collectors may freeze.Therefore,a micro heat pipe technology was developed to adjust the working temperature by modifying photovoltaic panels into a micro heat pipe PV/T system.The testing will start from December 1,2021 to February 28,2022 at 9:30 and stop at 16:30.Taking the winter solstice day of December 24,2021 as a typical day,the average photothermal efficien-cy,average photoelectric efficiency,and average total efficiency of typical scales are 26.4%,12.8%,and 39.4%,respectively.The working medium used in the micro heat pipe is R141b,which has a lower boil-ing point compared to acetone and higher system efficiency.Based on experimental data,a fitting formula for the surface temperature of the PV/T micro heat pipe was developed,with an average error of 7.1%.