Aumento da eficiência de painéis fotovoltaicos com esfriamento por energia geotérmica e aquecimento de água

Detalhes bibliográficos
Ano de defesa: 2014
Autor(a) principal: Fernandes, Felipe Teixeira
Orientador(a): Não Informado pela instituição
Banca de defesa: Não Informado pela instituição
Tipo de documento: Dissertação
Tipo de acesso: Acesso aberto
Idioma: por
Instituição de defesa: Universidade Federal de Santa Maria
BR
Engenharia Elétrica
UFSM
Programa de Pós-Graduação em Engenharia Elétrica
Programa de Pós-Graduação: Não Informado pela instituição
Departamento: Não Informado pela instituição
País: Não Informado pela instituição
Palavras-chave em Português:
Link de acesso: http://repositorio.ufsm.br/handle/1/8541
Resumo: This thesis deals with the increased efficiency of photovoltaic panels (PVs) through cooling the cells by geothermal energy and water heating. Initially, a photovoltaic modeling is made proposing an equation to obtain the maximum power point considering the variations of solar radiation and cell temperature. Initially, it is proposed a PV modeling for obtaining the maximum power point (MPP) as a function of solar radiation and temperature of the cells by the PV 5-parameter model. Thus, the determination of the PV MPP, which depends only on the internal parameters, can be made with greater precision. Water circulation by a pipe that passes through the thermal reservoir is used to cool the PV. This is complemented by cooling hoses buried underground to exchange geothermal avoiding the saturation of the heat exchange between PV and water circulation, increasing the PV efficiency. After studies on the constitution of the soil, the technical characteristics of the tubes for circulating water, hydraulic pump and heat exchanger installed after PV, economic analysis and a set of two PVs were mounted with and without the heat exchangers to verify the gains in power and performance. The experiments were made with two PVs operating in MPP, proving that the MPP and the performance increase with decreasing temperature as the modeling performed. During the experiments, the underground temperature varied slightly, avoiding the heat exchange saturation. The main contributions include the PV modeling to obtain the MPP with a single iteration, the use of geothermal energy without heat pump and residential heat load reduction by use of heated water circulation in PVs.