Thermodynamic Simulation of Photovoltaic Panels Installed in Surfaces with Different Albedo Indices using the Finite Element Method Dayane Martins Salles, Antônio Pereira Arantes Neto, Nikholas Segatti, Jussanã Milograna, Elder Geraldo Domingues 2018/04/20

Abstract

High temperatures decrease the output voltage in photovoltaic panels, interfering in the energy generation process. This article presents simulation results that demonstrate the interference of the surface material on which the photovoltaic panels are installed in the panels operation temperature. The study was developed from the thermodynamic simulation model using the finite element method. The cases were analyzed from the construction of a three-dimensional design with two photovoltaic panels installed on a surface of galvanized steel of 80m², which had 20m² of area covered by a reflective paint. Ten simulation routines were performed considering the different indices of solar irradaytion in a period of 18 hours. The simulation results confirmed that the surface of the panels installation was cooled to 20°C after the coating application. Measurements from a thermal camera was presented showing the heat transfer in the materials, and the temperature profile of the panels and the surface of the roof with and without the reflective paint.

Authors and affiliations

Dayane Martins Salles1,2, Antônio Pereira Arantes Neto3, Nikholas Segatti4, Jussanã Milograna1, Elder Geraldo Domingues1,2
1. Master Program on Sustainable Process Technology
2. Nucleus of Experimental and Technological Studies and Research (NExT)
3. Mechanical Engineering Program,
4. Electrical Engineering Program
Federal Institute of Goiás (IFG), Campus of Goiânia – Goiás, Brazil

Key words

Energy Efficiency, Finite Element Method, Photovoltaic Panel, Thermodynamic Simulation, Reflective Paint.

References

[1] BRAUN-GRABOLLE, P. The integration of solar photovoltaic systems on a large scale without urban electricity distribution system.(in Portuguese). 2010.
[2] PARIDA, B., INIYAN, S., GOIC, R. A review of solar photovoltaic technologies. Renewable and sustainable energy reviews, v. 15, n. 3, p. 1625-1636, 2011.
[3] HINRICHS, R. A., KLEINBACH, M., REIS, L. B. Energy and environment (in Portuguese). Cengage Learning Editores, 5ª edição, 2014
[4] TESKE, S., MASSON, G. Solar generation 6. Solar photovoltaic electricity empowering the world. 2011.
[5] MARQUES, J. P. S. M., PEREIRA, A. J. C. Study of Hybrid Electric Power Microproduction Systems Using Solar and Wind Energy (in Portuguese), 2011.
[6] GOMES, P. L. I. Semi-transparent solar cells of amorphous silicon micro / nanocrystalline (in Portuguese). 2009. Tese de Doutorado. FCT-UNL
[7] ROYNE, A., DEY, CHRISTOPHER, J., MILLS, D. R. Cooling of photovoltaic cells under concentrated illumination: a critical review. Solar energy materials and solar cells, v. 86, n. 4, p. 451-483, 2005.]
[8] MOHARRAM, K. A., ABD-ELHADY, M. S., KANDIL, H. A., & EL-SHERIF, H. (2013). Enhancing the performance of photovoltaic panels by water cooling. Ain Shams Engineering Journal, 4(4), 869-877.X
[9] LAFAE - Laboratory of Alternative Energy Sources "The influence of temperature on the electrical performance of the modules: The thermal behavior of the panel" (in Portuguese). Avaliable in: http://www.solar.coppe.ufrj.br/practica2.html. Acess: 08/02/2017.
[10] WILLIAMS N. C. G., J. P. RAYNER, K. J. RAYNOR. Green roofs for a wide brown land: Opportunities and barriers for rooftop greening in Australia. Urban Forestry & Urban Greening, v. 9, n. 3, p. 245-251, 2010.
[11] MATIAS, C. A.; SANTOS, L. M.; ALVES, A. J.; CALIXTO, W. P. Electrical performance evaluation of PV panel through water cooling technique (in Portuguese). (EEEIC) IEEE 16th International Conference on Environment and Electrical Engineering, 2016
[12] KLUTH A. Using water as a coolant to increase solar panel efficiency, California State science fair, California, USA, April 2008
[13] MOSHFEGH, B., & SANDBERG, M. (1998). Flow and heat transfer in the air gap behind photovoltaic panels. Renewable and Sustainable Energy Reviews, 2(3), 287-301.
[14] SANTAMOURIS, M., AKBARI, H., SYNNEFA, A. Estimating the effect of using cool coatings on energy loads and thermal comfort in residential buildings in various climatic conditions. Energy and Buildings, v. 39, n. 11, p. 1167-1174, 2007.
[15] LOTTI, R.S. et. al. "Scientific applicability of the finite element method" (in Portuguese). Maringá, v. 11, n. 2, p. 35-43, mar./abril 2006.
[16] Google Earth, 2017. [17] CARVALHO, E. F A., CALVETE, M. J. F. Solar Energy: A past, a present ... an auspicious future (in Portuguese). Virtual Journal of Chemistry, v. 2, n. 3, p. 192-203, 2010.
[17] ASHRAE, Fundamentais Handbook. American Society of Heating, Refrigerating and Air-Conditioning Engineers, Atlant, 2001. CH, 32
[18] NANOTHERMIC, Technical specifications manual (in Portuguese), 2017. [20] HE, Wei et al. Hybrid photovoltaic and thermal solar-collector designed for natural circulation of water. Applied energy, v. 83, n. 3, p. 199-210, 2006. [21] FRAISSE, G.; MÉNÉZO, C.; JOHANNES, K. Energy performance of water hybrid PV/T collectors applied to combisystems of Direct Solar Floor type. Solar Energy, v. 81, n. 11, p. 1426-1438, 2007.