Étude expérimentale de l’optimisation du mode d’utilisation d’un distillateur solaire plan à multiples effets

Abstract

Experimental study on the optimization of the operating mode of a multiple-effect flat solar still

This work experimentally investigates the influence of the operating mode on the productivity of a five-compartment flat plate solar still. Three modes are compared: (1) all compartments active, (2) only the central compartment active, (3) only the lateral compartments active. An original directional parameter, the mean absolute angle between the solar trajectory and the vertical East‑West plane, is introduced. Spearman analyses show that productivity is strongly correlated with useful heat (  = 1) and mean water temperature (  = 0.94). Mode 1 yields the highest productivity (4.82 kg m^-2 day^-1), followed by Mode 3 (2.51 kg m^-2 day^-1), and then Mode 2 (< 0.9 kg m^-2 day^-1). Useful heat depends significantly on daily irradiation (  = 0.97) and on the solar angle (  = – 0.66). For equatorial regions, maximum performance is achieved under high irradiation (end of dry season) and when the sun is close to the vertical East‑West plane (equinoxes). Mode 2, although less productive, is suitable for photosensitive compounds.

https://doi.org/10.70974/mat10126012