Estudo de desempenho de um sistema híbrido fotovoltaico/térmico
The present dissertation presents a performance study of a hybrid photovoltaic / thermal system (PVT system), comparing it with a photovoltaic system (photovoltaic system). The electrical and thermal power, efficiency and energy produced by the systems were analyzed, correlating the influence of...
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| Formato: | Dissertação |
| Idioma: | por |
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Brasil
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| Endereço do item: | https://repositorio.ufrn.br/jspui/handle/123456789/22399 |
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| Resumo: | The present dissertation presents a performance study of a hybrid photovoltaic / thermal
system (PVT system), comparing it with a photovoltaic system (photovoltaic system). The
electrical and thermal power, efficiency and energy produced by the systems were analyzed,
correlating the influence of the temperature of the photovoltaic module and the electrical
efficiency of the systems. The photovoltaic (PV) module used was the MSX 77 of the brand
SOLAREX, composed of polycrystalline solar cells, whose peak power is 77 Watts. The PVT
system analyzed was of the PVT-liquid type, composed of the MSX77 photovoltaic module
and a flat plate type solar collector made of acrylic, the water supply of the manifold was
forced by gravity and with open system. To determine the characteristic curves of the PV
module and consequently the maximum electric power generated, a load bank formed by
power resistors was developed. The thermal power was quantified by measuring the flow of
the water that fed the collector and the difference in temperature of the incoming and outgoing
water. With the powers and the radiation incident on the systems, the efficiencies were
determined. The maximum electrical efficiency reported by the manufacturer of the PV
module is 10.8 %, however, under actual operating conditions, the maximum efficiency of the
PV module was 8.46 %. In the PVT system, the PV module showed a maximum efficiency of
approximately 7.8 % at the point of maximum power generated. The average efficiency of the
thermal system was around 42.5 %. The PVT system provided a reduction in the temperature
of the PV module, increasing the efficiency of electric generation, providing an increase in the
order of 6.9 % in the average daily electric energy. The PVT system, besides providing an
increase in electrical energy, still provides thermal energy with a higher efficiency than
electric. The heated water can be used to power water heating systems for bathing,
contributing to reduce the consumption of electric energy of a residence. |
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