We propose an extended model for the climatization of an ecological bu
ilding. Solar radiation is the main energy source. The theoretical app
roach includes models for: (i) generating meteorological data; (ii) ge
nerating solar radiation data; (iii) optimum operation of a photovolta
ic array; (iv) thermal interactions between building and ambient; (v)
operation of the climatization system; and (vi) operation of the refri
geration system. Preliminary results show that the photovoltaic array
provides all of the energy required to drive the climatization system
in midsummer on clear days. The Romanian standard STAS 6648/1-82 overe
stimates the thermal load of the climatization system. The development
of more sophisticated computing procedures is desirable. We show the
influence of the type of day (with clear or covered sky) and of solar-
cell quality on both the thermal load and the power delivered by the p
hotovoltaic array. (C) 1998 Elsevier Science Ltd. All rights reserved.