Comparative Study of Three Solar Desalination Units Based on Theoretical and Experimental Approach

Abstract

This work presents a theoretical and experimental study of a double slope still with and without immersed fins compared to the single solar still monthly production. The influences of the distance between fins, fin heights, fin numbers and water layer thickness on the solar still production have been widely researched. From the obtained results, the distance between fins has no significant effect on the still productivity. Moreover, for fin heights from 2 to 5 cm, cause the productivity raising, when the fin heights are from 6 to 8 cm found an increasing in the still production. A larger fin numbers lead to a rising in the produced water amount. The water quantity augmentation in the basin makes the water productivity decreasing. The experimentally obtained results during the day June 11, 2016, show that the solar still with immersed fins productivity was about 15 to 27 % higher than that of the simple solar still, under the following conditions, i.e. mw = 42.61 kg, h1 = 3.6 cm, Vw = 3.5 m/s, lw = 5 cm and Nfins = 12.

Effect of the Double Glazing on the performance of an Air Solar Collector

“…The second layer of glass (3) is subjected to two convective transfers: (one between the first layer of air (2) and its upper face and the other between the second layer air (4) and its lower face) but also with two radiative transfers (one with its upper face and the lower face of the first layer of glass (1) and the other between the upper face of the absorber (5) and its underside).…”

“…One of the simplest and most direct applications of this naturally and freely available energy is to convert solar radiation into heat. This conversion is accomplished using solar panels with the objective of heating water or air for domestic and industrial applications [1]. Glazing is the top cover of a solar collector.…”

Investigation on Wind Power Generation for Different Heights on Bechar, South West of Algeria

“…The exponent  varies with height, time of day, season, and nature of the terrain, wind speeds, and temperature. For relatively low heights from the ground, the values of alpha for typical classes are given in [11]. In this study, without specific site data, the one-seventh-power law ratio is applied [12].…”

Air Behavior Inside Duct of Air Solar Collector with Three Models of Baffles

“…The objective of this study is to perform the flat plate collector with using computational fluid dynamics simulation to perform detailed fluid flow and heat transfer analysis. Hocine Moungar et al [7], presents a theoretical and experimental study of a double slope still with and without immersed fins compared to the single solar still monthly production. The influences of the distance between fins, fin heights, fin numbers and water layer thickness on the solar still production have been widely researched.…”