针对高能流密度下密集阵列光伏组件的冷却控温问题,采用模块化阵列射流冲击装置实现电池控温。基于Fluent软件对密排光伏组件阵列射流冲击换热进行数值模拟,研究不同射流孔径、冲击间距比与射流孔长径比等关键参数对其电池冷却的影响特性,综合分析了质量流量和能流密度变化对其冷却效果和所获电能的影响规律。结果表明冲击间距比对电池的换热效果存在最优值,在本文范围内h3/d=4.5时换热效果最佳,但随着孔径的增大其换热均匀性有所下降;射流孔高度增大,换热效果和电池表面温度均匀性均降低;随着电池表面聚焦能量增加,其发电功率将成比例增加,而电池温度仅有小幅度升高;随着质量流量的合理增加,电池温度大幅度降低,且所产生的压降功耗基本不变。该文工作能为高倍聚光密集阵列光伏组件的高效均匀控温设计提供基础。
Abstract
To investigate the cooling and temperature control of dense array photovoltaic modules under high energy flux density, adopt a modular array jet impingement device to realize the battery temperature control. The numerical simulation of jet impingement heat transfer of dense photovoltaic module array is base on Fluent software. The influence of critical parameters such as different jet aperture, impact spacing-aperture ratio, and jet hole length-diameter ratio on the battery’s cooling was studied. Mass flow and energy flow density on the cooling effect and the obtained electric energy were comprehensively analyzed. The results show that the impact spacing-aperture ratio has an optimal value for the battery’s heat transfer effect, and the heat transfer effect is the best when h3/d=4.5 in this range, but the heat transfer uniformity decreases with the increase of pore size. With the increase of jet hole height, the heat transfer effect and the battery surface’s temperature uniformity decrease. With the increase of the focused energy on the battery surface, the power generation will increase proportion, while the battery temperature will only increase slightly. With the moderate increase of mass flow rate, the battery temperature decreases significantly, and the generated voltage drop power consumption is unchanged. This work can provide a basis for efficient uniform temperature control design of high-power concentrating dense array photovoltaic modules.
关键词
光伏组件 /
能流密度 /
高倍聚光光伏光热系统 /
冲击冷却 /
传热特性
Key words
photovoltaic modules /
energy flux density /
HCPV/T /
impingement cooling /
heat transfer characteristics
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基金
湖南省自然科学基金（2019JJ40085; 2020JJ5189）; 湖南省教育厅科学研究项目（19C0794）
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