• FLORIN SĂFTOIU Universitatea Politehnica din Bucureşti
  • ALEXANDRU-MIHAIL MOREGA Universitatea Politehnica din Bucureşti


Photovoltaic panel, Single flow cooling system, Infrared irradiance, Joule effect, Numerical simulation


This study focuses on the heating of a PV panel subject to infrared irradiance and the electric load-related Joule effect, as reducing the temperature of the PV panel may increase the PV conversion efficiency. A water-circulated heat exchanger is provided on the back of the PV panel to minimize the hotspot temperature. The heat thus extracted out of the system may be further used in a secondary energy conversion system.


(1) K.A. Moharram, M.S. Abd-Elhady, H.A. Kandil, H. El-Sherif, Enhancing the performance of photovoltaic panels by water cooling, Ain Shams Engineering Journal, 4, 4, pp. 869–877, 2013.

(2) W. Owhaib, Y. Qanadah, H. Al-Ajalin, A. Tuffaha, W. Al-Kouz, Photovoltaic panel efficiency improvement by using direct water passive cooling with clay pot, International Renewable Engineering Conference (IREC), 12, pp. 1-4, 2021.

(3) S.A. Saada, I. Kecili, R. Nebbali, Preliminary study of a water-cooled PV system, International Conference on Communications and Electrical Engineering (ICCEE), pp. 1-4, 2018.

(4) C. Hajjaj, H. Amiry, R. Bendaoud, S. Yadir, A. Elhassnaoui, S. Sahnoun, M. Benhmida, A. El Rhassouli, Design of a new photovoltaic panel cooling system to optimize its electrical efficiency, International Renewable and Sustainable Energy Conference (IRSEC), pp. 623-627, 2016.

(5) D. Adhya, S. Bhattacharjee, S. Acharya, Back surface cooling of photovoltaic panel – an experimental investigation, IEEE International Conference on Power Systems (ICPS), 6, 1, pp. 1-6, 2016.

(6) A. Bejan, Heat Transfer, John Wiley & Sons, Inc., New York, 1993.

(7) H.T. Lin, W.S. Yu, S.L Yang, Free convection on an arbitrarily inclined plate with uniform surface heat flux, Wärme und Stofffübertragung, 24, pp.183-190, 1989.

(8) A.M. Morega, Principles of Heat Transfer, Chapter VII in Mechanical Engineer’s Handbook, Ed. D.B. Marghitu, Academic Press, pp. 446-557, 2001.

(9) A.M. Morega, Energy Sources, Lecture notes, UPB, 2020.

(10) ***Solahart Data Sheet, ih0113_qcells_qplus-g43_285w_april-2019_web (2019).

(11) A.M. Morega, Photovoltaic Systems, Lecture notes, UPB, 2020.

(12) *** Comsol Multiphysics v. 5.6a, Release Notes (2021).






Thermotechnique et thermoénergétique | Thermotechnics and Thermal Energy