[1] D. Gielen, F. Boshell, D. Saygin, M. D. Bazilian, N. Wagner, and R. Gorini, “The role of renewable energy in the global energy transformation,” Energy Strateg. Rev., vol. 24,   pp. 38–50, 2019, doi: 10.1016/j.esr.2019.01.006.

[2] C. G. Popovici, S. V. Hudişteanu, T. D. Mateescu, and N. C. Cherecheş, “Efficiency Improvement of Photovoltaic Panels by Using Air Cooled Heat Sinks,” Energy Procedia, vol. 85, no. November 2015, pp. 425–432, 2016, doi: 10.1016/j.egypro.2015.12.223.

[3] A. A. Hachicha, C. Ghenai, and A. K. Hamid, “Enhancing the Performance of a Photovoltaic Module Using Different Cooling Methods,” Int. J. Energy Power Eng., vol. 9, no. 9, pp. 1106–1109, 2015.

[4] M. G. Villalva, J. R. Gazoli, and E. Ruppert Filho, “Modeling and circuit-based simulation of photovoltaic arrays,” 2009 Brazilian Power Electron. Conf. COBEP2009, pp. 1244–1254, 2009, doi: 10.1109/COBEP.2009.5347680.

[5] An. Al-Shamani, K. Sopian, S. Mat, H.A. Hasan, AM. Abed, MR. Ruslan , “Experimental studies of rectangular tube absorber photovoltaic thermal collector with various types of nanofluids under the tropical climate conditions,” Energy Convers Manag;124:528–42, 2016.   

[6] G. N. Tiwari, M. Meraj, ME. Khan, RK. Mishra, V. Garg, “Improved Hottel-Whillier-Blissequation for N-photovoltaic thermal-compound parabolic concentrator (N-PVTCPC) collector,” Solar Energy,166:203–12, 2018.

[7] A. A. Hasan, S. Baig, Sundaram , and T. K. Mallick, “ Use of Nanofluids in Solar PV/Thermal Systems” International Journal of Photoenergy,” Volume 2019, Article ID 8039129, 17 pages, 2019.

[8]   J. H. Lee, S. G. Hwang and G. H. Lee,” Efficiency Improvement of a Photovoltaic Thermal(PVT) System Using Nanofluids,” Energies, 12, 3063, 2019. doi:10.3390/en12163063.

[9] S. Diwania, S. Agrawal, A. S. Siddiqui and S. Singh, “Photovoltaic–thermal (PV/T) technology: a comprehensive review on applications and its advancement” International Journal of Energy and Environmental Engineering 11:33–54, 2019.

[10]  M. R. Salem, M.M. Elsayed, A.A.  Abd-Elaziz, K. M. Elshazly, “Performance enhancement of the photovoltaic cells using Al2O3/PCM mixture and/or water cooling-techniques,” Renewable Energy, vol. 138, pp. 876-890, 2019, doi: https://doi.org/10.1016/j.renene.2019.02.032.

[11] D. Jones, “A thermal model for photovoltaic systems,” Solar Energy, pp. 349–359., 2001.

[12]  G. N. Tiwari and A. Gaur, “Photovoltaic thermal (PVT) systems and its applications," 2nd International Conference on Green Energy and Technology, pp. 132-138, 2014, doi: 10.1109/ICGET.2014.6966678.

[13]  M. S. Kundan, “Experimental Study on Thermal Conductivity and Viscosity of Al2O3 Nano transformer Oil,” International Journal on Theoritical and Applied Researcher in Mechanical Engineering (IJTARME), ISSN: 2319-3182, Volume-2, issue-3, 2013.

[14] I. Hasan, R. Sahar, and K. Azhar, “Theoretical temperature distribution investigation in electrical transformer by using nano-technology,” Eng. &Tech. Journal, Vol.34, Part (A), No.12, 2016.