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International Journal of Photoenergy
Volume 2017 (2017), Article ID 3829671, 10 pages
Research Article

Performance Investigation of Air Velocity Effects on PV Modules under Controlled Conditions

1Mechanical Engineering Department, University of Engineering and Technology Taxila, Taxila, Pakistan
2Mechanical Engineering Department, COMSATS Sahiwal, Sahiwal, Pakistan
3Mechanical Engineering Department, Faculty of Engineering, HITEC University, Taxila, Pakistan
4Department of Mechanical and Manufacturing Engineering, Faculty of Engineering, Universiti Malaysia Sarawak (UNIMAS), 94300 Kota Samarahan, Sarawak, Malaysia

Correspondence should be addressed to Muzaffar Ali

Received 26 May 2017; Accepted 6 August 2017; Published 12 December 2017

Academic Editor: Srinivas Devayajanam

Copyright © 2017 Muzaffar Ali et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Junction temperature of PV modules is one of the key parameters on which the performance of PV modules depends. In the present work, an experimental investigation was carried out to analyze the effects of air velocity on the performance of two PV modules, that is, monocrystalline silicon and polycrystalline silicon under the controlled conditions of a wind tunnel in the presence of an artificial solar simulator. The parameters investigated include the surface temperature variation, power output, and efficiency of PV modules under varying air velocity from near zero (indoor lab. conditions) to 15 m/s. Additionally, the results were also determined at two different module angular positions: at 0° angle, that is, parallel to air direction and at 10° angle with the direction of coming air to consider the effects of tilt angles. Afterwards, the thermal analysis of the modules was performed using Ansys-Fluent in which junction temperature and heat flux of modules were determined by applying appropriate boundary conditions, such as air velocity, heat flux, and solar radiation. Finally, the numerical results are compared with the experiment in terms of junction temperatures of modules and good agreement was found. Additionally, the results showed that the maximum module temperature drops by 17.2°C and the module efficiency and power output increased from 10 to 12% with increasing air velocity.