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The temperature of the photovoltaic module has an adverse effect on the performance of photovoltaic modules. The photovoltaic module converts a small portion of energy from solar radiations into electricity while the remaining energy wastes in the form of heat. In this study, water cooled PV/T system was analyzed to enhance the efficiency by absorbing the heat generated by the photovoltaic modules and allowing the photovoltaic module to work at comparatively low temperature. For this system, four photovoltaic modules of two different types were used. To investigate the cooling effect, two modules were modified by making ducts at their back surface having inlet and outlet manifolds for water flow. The measurements were taken with cooling and without cooling of photovoltaic modules. The temperature was measured at inlet, outlet and at different points at the back of Photovoltaic modules. It was found that there was a linear trend between the module efficiency and temperature. The average module temperature of c-Si and p-Si modules without cooling was 13.6% and 7.2% lower respectively than the same modules without cooling. As a result of temperature drop, the average module electrical efficiency of c-Si and p-Si was 13% and 6.2% higher respectively compared to the modules without cooling. Flowing water also gains useful heat from PV module so the resultant overall energy of the system was much higher.
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 Ali, H.M., Mahmood, M., Bashir, M.A, Ali, M. and Siddiqui, A.M., Outdoor testing of Photovoltaic Modules during summer in Taxila, Pakistan. Online, Journal of Thermal Science (2013). DOI:10.2298/TSCI131216025A.
 P. Singh, S. N. Singh, M. Lal, and M. Husain, Temperature dependence of I-V characteristics and performance parameters of silicon solar cell, Solar Energy Materials and Solar Cells,. 92, no. 12, (2008), pp. 1611–1616.
 M. Mattei, G. Notton, C. Cristofari, M. Muselli, and P. Poggi, “Calculation of the polycrystalline PV module temperature using a simple method of energy balance,” Renewable Energy, vol. 31, no. 4, (2006) pp. 553–567,.
 S. Rehman and I. El-Amin, “Performance evaluation of an off grid photovoltaic system in Saudi Arabia,” Energy, vol. 46, (2012), pp. 451–458.
 Rosa CM, Rosa CP, Tina GM, Scandura PF. Submerged photovoltaic solar panel: SP2. Renewable Energy;35(8), (2010), pp. 1862-1865.
 Bahaidarah, H., Subhan, A., Gandhidasan, P., Rehman, S., Performance evaluation of a PV (photovoltaic) module by back surface water cooling for hot climatic conditions. Energy 59 (2013), pp.445-453.
 Krauter S. Increased electrical yield via water flow over the front of photovoltaic panels. Solar Energy Materials & Solar Cells, Vol. 82, (2010), pp. 131-137.
 Erdil E, Ilkan M, Egelioglu F. An experimental study on energy generation with a photovoltaic (PV) solar thermal hybrid system. Energy, Vol. 33,(2008), pp. 1241-45.
 Amori KE, Al-Najjar HMT. Analysis of thermal and electrical performance of a hybrid (PV/T) air based solar collector for Iraq. Applied Energy, Vol. 98, (2012), pp. 384-395.
 H.G. Teo a, P.S. Lee b, M.N.A. Hawlader, An active cooling system for photovoltaic modules, Applied Energy, Vol. 90 (2012), pp. 309–315.
 Al Harbi Y, Eugenio NN, Al Zahrani S. Photovoltaic-thermal solar energy experiment in Saudi Arabia. Renewable Energy, Vol. 15, (1998), pp. 483–486.
 Bahaidarah, H., Rehman, S., Subhan, A., Gandhidasan, P., and Baig, H., Performance evaluation of a PV module under climatic conditions of Dhahran, Saudi Arabia. Energy exploration & exploitation. Volume 33,no. 6 (2015) pp. 909–930.
 Bahaidarah, H., Tanweer, B., Gandhidasan, P., and Rehman, S., A combined optical, thermal and electrical performance study of a V-Trough PV system, experimental and analytical investigations, energies 8, (2015). ISSN 1996-1073.
 Sandnes B, Rekstad J. A photovoltaic/thermal (PV/T) collector with a polymer absorber plate: experimental study and analytic model. Sol Energy, Vol. 72(1), (2002), pp. 63–73.
 Zakherchenko R, Licea-Jime’nez L, Pe’rez-Garci’a SA, Vorobeiv P, DehesaCarrasco U, Pe’rez-Robels JF, et al. Photovoltaic solar panel for a hybrid PV/thermal system. Sol Energy Mater Sol Cells, Vol. 82(1–2), pp. 253–261.
 Saitoh H, Hamada Y, Kubota H, Nakamura M, Ochifuji K, Yokoyama S, et al. Field experiments and analysis on a hybrid solar collector. Applied Thermal Engg., Vol. 23, (2003), pp. 2089–2105.
 Dubey S, Tiwari GN. Thermal modeling of a combined system of photovoltaic thermal (PV/T) solar water heater. Sol Energy, Vol. 82, (2008), pp. 602–612.
 Chaudhry M.A., Raza R., and Hayat S. A., “Renewable energy technologies in Pakistan: prospects and challenges,” Renewable and Sustainable Energy Reviews, vol. 13(6), (2009), pp. 1657–1662.
 Ulfat I., Javed F., and Abbasi F.A., “Estimation of solar energy potential for Islamabad, Pakistan,” Energy Procedia, vol. 18, (2013), pp. 1496–1500.
 Mirza, U. K., Mercedes M,V., and Ahmad N., “Status and outlook of solar energy use in Pakistan,” Renewable and Sustainable Energy Reviews, vol. 7(6), (2003), pp. 501–514.
 Irwan YM, Leow WZ, Irwanto M, Fareq M, Amelia AR, Gomesh N, et al. Indoor test performance of PV panel through water cooling method. Energy Procedia 79 (2015) pp. 604–11
 El-Seesy, I. E., Khalil, T., Ahmed, M. T., Experimental Investigations and Developing of Photovoltaic/Thermal System, World Applied Sciences Journal 19(9),(2012), pp.1342-1347.
 Chandrasekar, M., et al., Passive cooling of standalone flat PV module with cotton wick structures, Energy Conversion and Management 71 (2013) 43–50.
 Han, X., Wang, Y., Zhu, L., The Performance and Long-term Stability of Silicon Concentrator Solar Cells Immersed in Dielectric Liquids, Energy Conversion and Management 66 (2013) 189–198.
 Wu, S.Y., Zhanga,Q.L., Xiao, L., Guoa, F.H., A heat pipe photovoltaic/thermal (PV/T) hybrid system and its performance evaluation. Energy Buildings, 43 (2011), pp. 3558–3567
 Kalogirou, A.S., Use of TRNSYS for modelling and simulation of a hybrid PV–thermal solar system for Cyprus. Renewable Energy 23 (2001), pp. 247–260.
 Abdolzadeh M, Ameri M. Improving the effectiveness of a photovoltaic water pumping system by spraying water over the front of photovoltaic cells. Renewable Energy 34 (2009); pp. 91–98.
 Kolhe, M., Bin, D., Hu, E., Water cooled concentrated photovoltaic system. Int J. Smart Grid Clean Energy 2 (2013)
 Cox III CH, Raghuraman P. Design consideration for flat-plate photovoltaic/thermal collectors. Solar Energy, Vol. 35(1), (1985), pp. 227–241.
 I. Ceylan, A.E. Gurel, H. Demircan, B. Aksu, Cooling of a photovoltaic module with temperature controlled solar collector, Energy and Buildings (2014), http://dx.doi.org/10.1016/j.enbuild.2013.12.058.
 Bashir, M.A., Ali, H.M., Ali, M., and Siddiqui, A.M., An Experimental Investigation of Performance of Photovoltaic Modules in Pakistan, Journal of Thermal Science., (2015) Supplement, Vol. 19, pp. S525- S534.