An innovative cooling method for concentrator photovoltaic (CPV) systems is essential to control the temperature of photovoltaic cells to boost the net output power and extend their lifetime. Thus, novel designs of radially flow microchannel heat sinks are developed. Three different configurations of single-layer radial microchannel (Conf. A), double-layer radial microchannel (Conf. B), and double-header radial microchannel (Conf. C) are studied. The new designs offer a symmetrical distribution of coolant through the heat sink with lower pressure drop. Consequently, a higher temperature uniformity over the cell surface is attained along with lower thermal stresses. A comprehensive three-dimensional thermal model for the concentrator photovoltaic system coupled with the proposed heat sinks was developed and numerically simulated. The results revealed that the new heat sink configurations significantly decreased the silicon layer temperature while maintaining high-temperature uniformity. Furthermore, when compared to other configurations, using the double-header heat sink (Conf. C) achieved the lowest cell temperature (83.6 °C) at the highest temperature uniformity with the deviation of 1.8 °C, the minimumpumping power of 1.4 W and the highest net electrical power of 42.7 W at a solar concentration ratio (CR) of 20 suns. Finally, the CPV system coupled with Conf. C attained the minimum unit price of electricity at 8 Ȼ/KWh compared to 16.9 Ȼ/KWh form the utility in the United States.

中文翻译：

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使用径向微通道散热器的新颖配置增强低聚光光伏系统的性能

聚光光伏 (CPV) 系统的创新冷却方法对于控制光伏电池的温度以提高净输出功率并延长其使用寿命至关重要。因此，开发了径向流动微通道散热器的新颖设计。研究了单层径向微通道（Conf.A）、双层径向微通道（Conf.B）和双头径向微通道（Conf.C）的三种不同配置。新设计通过散热器实现冷却剂的对称分布，并具有较低的压降。因此，电池表面的温度均匀性更高，热应力更低。开发了与所提出的散热器相结合的聚光光伏系统的综合三维热模型并进行了数值模拟。结果表明，新的散热器配置显着降低了硅层温度，同时保持了高温均匀性。此外，与其他配置相比，使用双头散热器（Conf.C）在最高温度均匀性下实现了最低电池温度（83.6℃），偏差为1.8℃，最小泵浦功率为1.4W，当太阳聚光比 (CR) 为 20 个太阳时，最高净电功率为 42.7 W。最后，CPV 系统与 Conf 相结合。 C 的最低电价为 8 埃/千瓦时，而美国公用事业公司的最低电价为 16.9 埃/千瓦时。