基于微热管的太阳电池HCPV模组新型散热研究

高倍聚光光伏(HCPV)模组凭着其特有的优势,近些年得到了广泛的应用。HCPV模组采用的是III-V族多结太阳电池,尽管如今III-V族多结太阳电池的实验室最高光电转换效率已高达46.0%,而采用三结电池的HCPV模组,其最高转化效率只有35%左右。造成HCPV模组效率下降的主要原因之一就是模组的散热和工作温度均匀性问题。因此,如何对HCPV模组进行有效地均匀散热对提高模组转化效率具有重要的意义。热管作为一种高效相变传热技术,具有当量导热系数很高,且恒温传热的特点。本文针对典型HCPV模组的热流分布特点和结构特点,采用扁平微热管阵列作为新型散热器,实验研究了基于微热管阵列散热的HCPV系统的光电特性和散热特性。研究结果表明,优化工况下,采用微热管阵列作为散热装置的HCPV模组必常规HCPV模组其输出功率大约提高22%,表明该散热结构具有很好的应用前景。

A New Heat Dissipation Research of High Concentrated Photovoltaic Based on Micro-heat Pipe

With its unique advantages, High Concentrated Photovoltaic(HCPV) modules have been widely used in recent years. HCPV modules usually use III-V multi-junction solar cells. Although the photoelectric conversion efficiency of III-V multi-junction solar cells in laboratory is as high as 46.0%, the highest conversion efficiency of HCPV modules is only 35%. The problem of heat dissipation and uniform temperature uniformity are the main reasons for the decrease of HCPV modules efficiency. Therefore, it is of great significance to improve the transformation efficiency of HCPV modules through effectively and evenly heat dissipation. As an efficient heat transfer technique, heat pipe has the characteristics of high thermal conductivity and constant temperature heat transfer. Aiming at the typical HCPV modules of heat flux distribution characteristics and structure characteristics, micro-heat pipe array was used as a new type of heat sink. The photoelectric characteristics and heat dissipation characteristics of HCPV system based on the heat dissipation of micro-heat pipe array are studied experimentally. Research results show that the output power of HCPV modules with heat-pipe array is 22% higher than the regular under the optimized conditions. It shows that the heat dissipation structure has a good application prospect.