利用多孔纳米通道的光致发光器件的热管理
Thermal Management of Photovoltaics using Porous Nanochannels
摘要：
太阳能电池的光电转换效率取决于其温度。当太阳辐射入射到光伏（PV）面板上时，其大部分被下面的材料吸收，这增加了其内能，导致热的产生。过热的PV板会导致其性能下降，这需要一种有效的冷却机制，可以提供最佳的电力输出。在本数值工作中，采用能够消散高热通量的多孔纳米通道装置的热管理来通过将装置集成在板的背面上来调节商业PV板的温度。通过数值求解能量平衡方程，得到了光伏表面温度的时空变化规律。通过评估稳态PV表面温度与和没有热管理，冷却的程度和由此产生的电力输出的增强进行了详细研究。发现纳米通道装置显著降低PV表面温度，平均冷却31.5 oC。此外，电功率输出提高约33%，响应时间缩短至1/8，突出了使用多孔纳米通道作为热管理装置的潜力。此外，数值方法是用来开发一个通用的曲线，可以预测任何通用的热管理设备的PV冷却的程度。
英文摘要：
The photoelectric conversion efficiency of a solar cell is dependent on its temperature. When the solar radiation is incident on the photovoltaics (PV) panel, a large portion of it is absorbed by the underlying material which increases its internal energy leading to the generation of heat. An overheated PV panel results in a decline in its performance which calls for an efficient cooling mechanism that can offer an optimum output of the electrical power. In the present numerical work, thermal management with a porous nanochannels device capable to dissipate high heat flux is employed to regulate the temperature of a commercial PV panel by integrating the device on the back face of the panel. The spatial and temporal variation of the PV surface temperature is obtained by solving the energy balance equation numerically. By evaluating the steady-state PV surface temperature with and without thermal management, the extent of cooling and the resulting enhancement in the electrical power output is studied in detail. The nanochannels device is found to reduce the PV surface temperature significantly with an average cooling of 31.5 oC. Additionally, the enhancement in the electrical power output by ~33% and the reduction in the response time to 1/8th highlight the potential of using porous nanochannels as a thermal management device. Furthermore, the numerical method is used to develop a universal curve which can predict the extent of PV cooling for any generic thermal management device.
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