Thermal modeling of semi-transparent photovoltaics: impacts on the cell efficiency and on the zone performance

In semi-transparent photovoltaic (STPV) systems, the heat accumulated in the back of the panels can be transmitted to the thermal zone and contribute to the heating effects. It can even cause an increase in the temperature of the photovoltaic (PV) cell, which reduces the efficiency of the system. Th...

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Autori principali:	Rodrigues, Thiago Toledo Viana, Carlo, Joyce Correna, Oliveira Filho, Delly
Natura:	Online
Lingua:	eng
Pubblicazione:	Universidade Estadual de Campinas 2018
Accesso online:	https://periodicos.sbu.unicamp.br/ojs/index.php/parc/article/view/8652785
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spelling	oai:ojs.periodicos.sbu.unicamp.br:article-86527852019-05-28T17:45:18Z Thermal modeling of semi-transparent photovoltaics: impacts on the cell efficiency and on the zone performance Modelagem térmica de fotovoltaicos semitransparentes: impactos na eficiência da célula e no desempenho da zona Rodrigues, Thiago Toledo Viana Carlo, Joyce Correna Oliveira Filho, Delly Solar Energy. Computational Simulation. Thermal Performance. EnergyPlu. Energia Solar. Simulação Computacional. Desempenho Térmico. EnergyPlus. In semi-transparent photovoltaic (STPV) systems, the heat accumulated in the back of the panels can be transmitted to the thermal zone and contribute to the heating effects. It can even cause an increase in the temperature of the photovoltaic (PV) cell, which reduces the efficiency of the system. This article aims to develop, through EnergyPlus software, a modeling method of the thermal properties of an STPV system, to evaluate the influence of the heat generated by the PV system in the internal temperature of the simulated environment and in the efficiency of the PV system itself. The method included computational simulations, in which we proposed STPV systems combined with different window configurations: single and double glazing, different thicknesses for the air gap, and high-performance glass. Shading devices play the role of the PV material to retrieve its thermal properties. The simulations showed that the STPV materials influence the thermal conditions of the zone, due to the increase in the mean air temperature (3.3°C) and the increase in the surface temperature of the windows (17.4°C). The differences among the window models were more significant in the thermal issues than in the variations of the PV system efficiency. The results confirm that the most used case in the literature presented the best performance, what strengthens the reliability of the proposed method. Em sistemas fotovoltaicos semitransparentes (STPV), o calor acumulado na parte posterior dos painéis pode ser transmitido para a zona térmica, e contribuir para o aquecimento do ambiente. Ele pode ainda provocar o aumento da temperatura da célula fotovoltaica (FV), o que reduz a eficiência do sistema. Este artigo tem como objetivo desenvolver, por meio do software EnergyPlus, um novo método de modelagem das propriedades térmicas de um STPV, ao avaliar a influência do calor gerado pelo sistema FV na temperatura interna do ambiente simulado e na eficiência do próprio sistema. O método incluiu simulações computacionais, em que foram propostos STPV integrados a diferentes configurações de esquadrias: vidros simples e duplos; espessuras diferentes para a camada de ar e vidros com propriedades térmicas especiais. Dispositivos de sombreamento desempenham o papel do material fotovoltaico para representar suas propriedades térmicas. As simulações mostraram que os STPV influenciam as condições térmicas da zona, tanto pelo acréscimo na temperatura média (3,3°C), quanto pelo aumento da temperatura superficial das janelas (17,4°C). As diferenças nos modelos de esquadrias foram mais significativas nas questões térmicas do que nas variações de eficiência do FV, com confirmação do caso mais usado na literatura como caso de melhor desempenho, o que reforça a confiança no método proposto. Universidade Estadual de Campinas 2018-12-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Computer simulation Simulação computacional application/pdf https://periodicos.sbu.unicamp.br/ojs/index.php/parc/article/view/8652785 10.20396/parc.v9i4.8652785 PARC Pesquisa em Arquitetura e Construção; Vol. 9 No. 4 (2018): O desempenho em foco; 305-318 PARC Pesquisa em Arquitetura e Construção; Vol. 9 Núm. 4 (2018): O desempenho em foco; 305-318 PARC Pesquisa em Arquitetura e Construção; v. 9 n. 4 (2018): O desempenho em foco; 305-318 1980-6809 eng https://periodicos.sbu.unicamp.br/ojs/index.php/parc/article/view/8652785/18830 Copyright (c) 2018 PARC Pesquisa em Arquitetura e Construção
institution	Universidade Estadual de Campinas
collection	OJS
language	eng
format	Online
author	Rodrigues, Thiago Toledo Viana Carlo, Joyce Correna Oliveira Filho, Delly
spellingShingle	Rodrigues, Thiago Toledo Viana Carlo, Joyce Correna Oliveira Filho, Delly Thermal modeling of semi-transparent photovoltaics: impacts on the cell efficiency and on the zone performance
author_facet	Rodrigues, Thiago Toledo Viana Carlo, Joyce Correna Oliveira Filho, Delly
author_sort	Rodrigues, Thiago Toledo Viana
title	Thermal modeling of semi-transparent photovoltaics: impacts on the cell efficiency and on the zone performance
title_short	Thermal modeling of semi-transparent photovoltaics: impacts on the cell efficiency and on the zone performance
title_full	Thermal modeling of semi-transparent photovoltaics: impacts on the cell efficiency and on the zone performance
title_fullStr	Thermal modeling of semi-transparent photovoltaics: impacts on the cell efficiency and on the zone performance
title_full_unstemmed	Thermal modeling of semi-transparent photovoltaics: impacts on the cell efficiency and on the zone performance
title_sort	thermal modeling of semi-transparent photovoltaics: impacts on the cell efficiency and on the zone performance
description	In semi-transparent photovoltaic (STPV) systems, the heat accumulated in the back of the panels can be transmitted to the thermal zone and contribute to the heating effects. It can even cause an increase in the temperature of the photovoltaic (PV) cell, which reduces the efficiency of the system. This article aims to develop, through EnergyPlus software, a modeling method of the thermal properties of an STPV system, to evaluate the influence of the heat generated by the PV system in the internal temperature of the simulated environment and in the efficiency of the PV system itself. The method included computational simulations, in which we proposed STPV systems combined with different window configurations: single and double glazing, different thicknesses for the air gap, and high-performance glass. Shading devices play the role of the PV material to retrieve its thermal properties. The simulations showed that the STPV materials influence the thermal conditions of the zone, due to the increase in the mean air temperature (3.3°C) and the increase in the surface temperature of the windows (17.4°C). The differences among the window models were more significant in the thermal issues than in the variations of the PV system efficiency. The results confirm that the most used case in the literature presented the best performance, what strengthens the reliability of the proposed method.
publisher	Universidade Estadual de Campinas
publishDate	2018
url	https://periodicos.sbu.unicamp.br/ojs/index.php/parc/article/view/8652785
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Thermal modeling of semi-transparent photovoltaics: impacts on the cell efficiency and on the zone performance

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