Estimación de la radiación solar global incidente en superficies inclinadas
Fecha
1992-01-01
Autores
Wright Gilmore, Jaime
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Editor
Universidad Nacional, Costa Rica
Resumen
Se estimaron valores diarios medios mensuales de la radiación solar global incidente sobre un colector solar inclinado, orientado hacia el sur, con datos observados o estimados de la radiación solar global, directa o difusa, sobre una superficie horizontal en Limón, Palmar Sur, Santa Rosa y Fabio Baudrit. Asimismo, se estimaron valores horarios medios mensuales de la radiación global incidente sobre la inclinaciones 10° y 30°, con mediciones experimentales de la radiación global y directa en Heredia, durante el período de abril a junio de 1991.
Para lograr la máxima eficiencia posible de un colector solar, se utilizó un modelo isotrópico y se encontró que la inclinación óptima de un colector en los meses de setiembre, octubre, noviembre, diciembre y enero las mayores inclinaciones óptimas. Asimismo, se encontró con base en mediciones horarias de la radiación global y directa en Heredia, que la inclinación horaria de 0° es la óptima durante abril, mayo y junio de 1991.
en este trabajo se presentan curvas que se espera sean de utilidad en instituciones de colectores solares o de paneles fotovoltaicos, en terrenos con pendientes variables en las regiones geográficas del Valle Central (representado por Fabio Budrit), Pacifico Norte (representado por Santa Rosa), Pacifico Sur (representado por Palmar Sur) y del Atlántico (representado por Limón)
Monthly averages of daily global radiation incident upon a tilted southfacing surface, were computed from the available values of global, direct or diffuse solar radiation incident upon a horizontal surface for Limon, Fabio Baudrit, Palmar Sur and Santa Rosa. Also, there were computed monthly averages hourly values of global radiation for tilt angles of 10 and 30 degrees, with experimental data in Heredia over the period from Abril to June 1991. In order to obtain the maximum output from a solar energy system, it is found by using different models, that the collector optimum tilt angle has to be in the range 5-30 degrees, for September, October, November, December, January and February, and 0 degrees for the optimum hourly tilt angle for Abril, May and June. The curves in this paper will be useful for large scale installations of solar collectors or photovoltaic panels in terrain with variable slopes in the geographic regions of the Central Valley (represented by Fabio Baudrit), North Pacific (represented by Santa Rosa), South Pacific (represented by Palmar Sur) and the Atlantic (represented by Limon)
Monthly averages of daily global radiation incident upon a tilted southfacing surface, were computed from the available values of global, direct or diffuse solar radiation incident upon a horizontal surface for Limon, Fabio Baudrit, Palmar Sur and Santa Rosa. Also, there were computed monthly averages hourly values of global radiation for tilt angles of 10 and 30 degrees, with experimental data in Heredia over the period from Abril to June 1991. In order to obtain the maximum output from a solar energy system, it is found by using different models, that the collector optimum tilt angle has to be in the range 5-30 degrees, for September, October, November, December, January and February, and 0 degrees for the optimum hourly tilt angle for Abril, May and June. The curves in this paper will be useful for large scale installations of solar collectors or photovoltaic panels in terrain with variable slopes in the geographic regions of the Central Valley (represented by Fabio Baudrit), North Pacific (represented by Santa Rosa), South Pacific (represented by Palmar Sur) and the Atlantic (represented by Limon)
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Palabras clave
RADIACION SOLAR, ENERGIA SOLAR, SOLAR ENERGY, SOLAR RADIATION