Cooling performance between natural draft cooling system and pre-spray cooling system of photovoltaic modules

Abstract

In order to solve the problem of low photoelectric conversion efficiency caused by high operating temperature of photovoltaic modules, a pre-spray cooling system for photovoltaic modules driven by buoyancy was proposed. Based on Fluent 2020R2 software, the photovoltaic module cooling systems of natural draft cooling and pre-spray cooling were established respectively. Their cooling performance under typical hot and drought conditions was compared. The research shows that the pre-spray cooling system obviously has a pre-cooling effect on the inlet air. After pre-spray cooling, the average temperature of photovoltaic modules is 7 K lower than that of natural draft cooling, and the photoelectric conversion efficiency is 0.43% higher than that of natural draft cooling.

Keywords

• photovoltaic modules
• cooling
• natural draft cooling
• pre-spray