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Effect of hot-spotted cell on PV module performance

In this paper, the effects of the hot-spotted cell on PV module were evaluated. The experimental observation was based on 100 kW PV array composed of 20 PV modules. It was found that an increasing number of hot-spotted solar cells in a PV module would likely increase its output power loss. | Effect of hot-spotted cell on PV module performance International Journal of Mechanical Engineering and Technology IJMET Volume 10 Issue 03 March 2019 pp. 994-1000. Article ID IJMET_10_03_100 Available online at http www.iaeme.com ijmet issues.asp JType IJMET amp VType 10 amp IType 3 ISSN Print 0976-6340 and ISSN Online 0976-6359 IAEME Publication Scopus Indexed EFFECT OF HOT-SPOTTED CELL ON PV MODULE PERFORMANCE Najib Hamisu Umar Sharda University Greater Noida NCR Delhi - 201306 India Birinchi Bora and Chandan Banerjee National Institute of Solar Energy Gurugram India corresponding author ABSTRACT In this paper the effects of the hot-spotted cell on PV module were evaluated. The experimental observation was based on 100 kW PV array composed of 20 PV modules. It was found that an increasing number of hot-spotted solar cells in a PV module would likely increase its output power loss. It was also noticed that most of the PV modules affected by hot-spotted PV string are relatively affected by high-temperature levels dust and Partial shading due to trees or tall vegetation. Furthermore the average performance ratio PR and degradation rate DR of all examined PV modules were analyzed. PR was observed to have a higher value of 0.78 in a non-hot-spotted PV array whereas low PR of 0.65 was observed in a hot-spotted PV array. High DR of 3.13 year was observed in hot-spotted PV array while low DR of 1.48 year was found in a module with no hot-spot. It was evident that the mean PR is significantly reduced due to the existence of hot-spots in the PV modules. DR was also increased due to hot-spot in the PV array. Hence it is important to select materials that have the highest thermal stability to avoid mild hot spot situations that will lead to immediate damage of the panel. Hot-spot study analysis will help increase PV lifetime power output by detecting and preventing hot spotting before it permanently damages the PV panel. Keyword Photovoltaic system Hot-spot Performance .