Simulation of instantaneous thermal fluxes in solar walls by polynomial approximations

J.J. Eliçabe Urriol and R.D. Piacentini

Applied Energy, 1989, vol. 34, issue 4, 289-302

Abstract: By solving the heat-conduction equation with polynomial driving functions, the time evolution of the thermal fluxes for external surface excitations representative of different ambient conditions has been obtained. The error involved in the determination of the initial thermal profile of the wall and the [`]numerical coupling' between successive periods, such as the diurnal and nocturnal ones, have been considered. Also, the case in which the surface temperature is assumed to be [`]floating' with a specified inner ambient temperature has been analysed. The proposed method is well adapted for the treatment of non-repetitive ambient conditions. We suggest applications for conventional walls.

Date: 1989
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