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Simulación de un enfriador híbrido alimentado por energía solar térmica
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Advisor(s)
Abstract(s)
RESUMEN: En este trabajo se presenta la modelación y simulación de un enfriador híbrido compresión/absorción alimentado por un concentrador solar de disco parabólico. El enfriamiento producido por este sistema se utiliza para aire acondicionado de una vivienda. El estudio fue realizado mediante balances de energía y de masa, en cada componente de los sistemas de refrigeración y del sistema solar. La transferencia de calor por convección y por radiación también fueron considerados. Los resultados muestran que la carga proporcionada por el sistema de compresión es 20% mayor que el alimentado por el sistema de absorción. Aunque el sistema de absorción opera al 40% de la carga total requerida en el espacio a condicionar, requiere en torno a 40% más energía térmica que el sistema de compresión. Pueden obtenerse temperaturas cercanas a 1050 °C y 400 °C con relación de concentración de 20 y radiación solar de 600W/m2 respectivamente. La eficiencia del colector solar es 0.4 (40%) cuando la temperatura exterior es 35 °C a baja radiación de 200 W/m2.
RESUMO: This paper presents the modeling and simulation of a compression/absorption hybrid chiller driven by a solar dish collector. The cooling produced by this system is used for air conditioning in a home. The study was carried out using energy and mass balances in each component of the cooling systems and the solar system. Convection and radiation heat transfer were also considered. The results show that the load provided by the compression system is 20% greater than that fed by the absorption system. Although the absorption system operates at 40% of the total load required in the space to be conditioned, it requires around 40% more thermal energy than the compression system. Temperatures close to 1050 °C and 400 °C can be obtained in concentration ratio of 20 and solar radiation of 600W/m2 respectively. Efficiency of the solar collector is 0.4 (40%) when the outdoor temperature is 35 °C at a low radiation of 200 W/m2.
RESUMO: This paper presents the modeling and simulation of a compression/absorption hybrid chiller driven by a solar dish collector. The cooling produced by this system is used for air conditioning in a home. The study was carried out using energy and mass balances in each component of the cooling systems and the solar system. Convection and radiation heat transfer were also considered. The results show that the load provided by the compression system is 20% greater than that fed by the absorption system. Although the absorption system operates at 40% of the total load required in the space to be conditioned, it requires around 40% more thermal energy than the compression system. Temperatures close to 1050 °C and 400 °C can be obtained in concentration ratio of 20 and solar radiation of 600W/m2 respectively. Efficiency of the solar collector is 0.4 (40%) when the outdoor temperature is 35 °C at a low radiation of 200 W/m2.
Description
CIES2020 - XVII Congresso Ibérico e XIII Congresso Ibero-americano de Energia Solar
Keywords
Solar energy Thermal solar systems Hybrid chiller
Pedagogical Context
Citation
Romage, G... [et.al.] - Simulación de un enfriador híbrido alimentado por energía solar térmica. In: CIES2020: As Energias Renováveis na Transição Energética: Livro de Comunicações do XVII Congresso Ibérico e XIII Congresso Ibero-americano de Energia Solar. Helder Gonçalves, Manuel Romero (Ed.). Lisboa, Portugal: LNEG, 3-5 Novembro, 2020, p. 451-457
Publisher
LNEG - Laboratório Nacional de Energia e Geologia