Masoud Talaei - Faculty of Mechanical Engineering, Islamic Azad University, Khomeinishahr Branch, Isfahan, Iran
Saeid Rasuoli Jazi - Faculty of Mechanical Engineering, Islamic Azad University, Khomeinishahr Branch, Isfahan, Iran

In this study, a computational method for determining the contribution of each module in the output power of a photovoltaic power plant is presented and the results of that are compared with actual values. This method is based on infrared thermography. In other words, in this study, we are trying to develop a new model for analyzing the photovoltaic module thermography images through field measurements on several photovoltaic systems in Isfahan region. Since it is very important to precisely calculate the module surface temperature in this method, practical methods are presented to calculate the temperature accurately. Validation of these methods have been done by performing specific experiments. The results of this study show that for modules in which difference between maximum and minimum temperature in STC conditions is less than ۱۰ °C and therefore classified in terms of temperature pattern in the healthy group, the calculation of power contribution of each module through this method is very close to the actual value ​​and have an error below ۲.۸%.