摘要
不同于传统的平板集热器和真空管集热器,直接吸收式太阳能集热器是一种集热工质直接吸收太阳辐射能量并转化为集热介质内能的新型集热器。从传热学角度,直接吸收式太阳能集热器因为减少了吸热表面到集热工质之间的传热损失而具有更高的集热性能。然而,传统的集热工质(如水、导热油、乙二醇等液体)对太阳光的吸收能力以及光热转换效率极其有限。近年来,纳米流体因其优异的传热性能和光学性能而被视为应用于直接吸收式太阳能集热器集热工质的最佳选择。本文介绍了直接吸收式太阳能集热器的传热模型,列举了用于直接吸收式太阳能集热器的纳米流体的研究进展,归纳总结了各类具有代表性的纳米流体及其光热转换性能的相关研究,最后对纳米流体在直接吸收式太阳能集热器中的应用进行了展望。
Different from the traditional flat plate collector and vacuum tube collector, the direct absorption solar collector (DASC) is a new type of collector that directly absorbs solar radiation energy and converts it into heat. From the perspective of heat transfer, direct absorption solar collectors have excellent heat collection performance due to reducing the heat transfer loss between the absorbing surface and the collecting medium. However, traditional thermal fluids such as water, conduction oil, ethylene glycol and other organic solvent have limited ability to absorb solar energy . In recent years, nanofluids have been regarded as the best choice for direct absorption solar collectors due to their excellent heat transfer and optical properties. This paper introduces the heat transfer model of DASC, summarizes the research progress of nanofluids for DASC, and lists various representative nanofluids and related research on their photothermal conversion performance. Finally, the application of nanofluids in DASC is prospected.
作者
左夏华
宋立健
关昌峰
阎华
杨卫民
安瑛
ZUO Xiahua;SONG Lijian;GUAN Changfeng;YAN Hua;YANG Weimin;AN Ying(College of Mechanical and Electrical Engineering,Beijing University of Chemical Technology,Beijing 100029,China;State Key Laboratory of Organic-Inorganic Composites,Beijing University of Chemical Technology,Beijing 100029,China)
出处
《材料导报》
CSCD
北大核心
2023年第21期25-33,共9页
Materials Reports
基金
国家自然科学基金面上项目(52176175)。
