Abstract Cooling of photovoltaic panels is an important factor in enhancing electrical efficiency, reducing solar cell destruction, and maximizing the lifetime of these useful solar systems. Generally, the traditional cooling techniques consume considerable amount of water, which can be a major problem for large scale photovoltaic power stations. In this experimental study, a pulsed-spray water cooling system is designed for photovoltaic panels to improve the efficiency of these solar systems and decrease the water consumption during the cooling process. The results of the photovoltaic panel with the pulsed-spray water cooling system are compared with the steady-spray water cooling system and the uncooled photovoltaic panel. A cost analysis is also conducted to determine the financial benefits of employing the new cooling systems for the photovoltaic panels. The results show that as compared with the case of non-cooled panel, the maximum electrical power output of the photovoltaic panel increases about 33.3%, 27.7%, and 25.9% by using the steady-spray water cooling, the pulsed-spray water cooling with DC = 1 and 0.2, respectively. The pulsed-spray water cooling system with DC = 0.2 can reduce the water consumption to one-ninth in comparison with the case of steady-flow one. The levelized cost of electricity by the uncooled system was found lower than the spray-cooled systems but very near to pulsed-spray water cooling with DC = 0.2. The levelized cost of electricity produced by the PV system is reduced about 46.5% and 76.3% by using the pulsed-spray water cooling system with DC = 1 and 0.2, respectively as compared with the case of steady-spray water cooling system. As a result, the new pulsed-spray water cooling is efficient from the economic point of view.

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一种高效的光伏板脉冲喷水冷却系统：实验研究和成本分析

摘要 光伏电池板的冷却是提高电效率、减少太阳能电池损坏和最大限度延长这些有用太阳能系统寿命的重要因素。通常，传统的冷却技术消耗大量的水，这对于大型光伏电站来说可能是一个主要问题。在这项实验研究中，为光伏电池板设计了脉冲喷雾水冷却系统，以提高这些太阳能系统的效率并减少冷却过程中的用水量。将采用脉冲喷水冷却系统的光伏板与稳态喷水冷却系统和未冷却光伏板的结果进行了比较。还进行了成本分析，以确定为光伏电池板采用新冷却系统的财务收益。结果表明，与非冷却板相比，采用稳喷水冷、脉冲喷水冷却的光伏板最大电功率输出分别提高了33.3%、27.7%和25.9%左右。 DC 分别为 1 和 0.2。DC=0.2的脉冲喷淋水冷系统与稳流系统相比，可将耗水量减少到九分之一。发现非冷却系统的平均电力成本低于喷雾冷却系统，但非常接近 DC = 0.2 的脉冲喷雾水冷却。光伏系统发电的平准化成本降低了约 46.5% 和 76。与稳定喷雾水冷却系统的情况相比，使用DC=1和0.2的脉冲喷雾水冷却系统分别降低3%。因此，从经济的角度来看，新的脉冲喷射水冷却是有效的。