Study and numerical simulation of solar system for air heating

Abstract

The use of solar energy in sunny countries, is an effective outil for compensate the lack in the energy, their benefits are not related only to its economic benefits but especially for the environmental protection, so we must find solutions to the problems of pollution. This work is a theoretical study of a solar flat plate collector; air is used as the heat transfer fluid. In this study, we established in first step calculation of solar radiation in various sites in Algeria (Adrar, El Oued, Bechar, Biskra and Tamanrasset). The second step is the parameters influence study of the sites and climate on the performance of our collector. The results obtained are encouraging for the use of this type in the heating in the winter; also it can be used in different kinds of drying.

Optical Modeling and Thermal Behavior of a Parabolic Trough Solar Collector in the Algerian Sahara

“…The parabolic trough solar concentrator has a copper tube on the cylindrical shape with a suitable selective layer located in the focal line of the parable. The selective surface that has a high absorption coefficient and a good absorbent of solar radiation, it has a high radiant emittance to Infrared waves [3][4][5][6][7][8][9][10][11][12][13]. The receiver tube is covered with a glass tube.…”

“…The direct solar radiation is concentrated on the absorber tube by a mirror on the shape of a parabola. A fluid heat transfer (HTF) moving into the copper tube and absorbs the heat that will use in many areas of industrial or household [3][4][5][6][7][8][9][10][11][12][13].…”

“…The parabolic trough solar concentrators are the most widely used in linear concentrators family for thermodynamic solar energy conversion, especially in industrial and domestic areas that require an operating temperature between 80 ° C and 160 ° C [4][5][6]16], but the flat solar collectors are used for low and medium temperature applications [9].…”

“…Figure (1) illustrated the monthly average of the overall radiation received on horizontal surfaces in the period between 1992 and 2002 on the national territory. In previou8s studies we have spoken to capture and exploitation of solar energy in the Algerian territory, in many fields [3][4][5][6][7][8][9][10][11][12][13]. This article will talk about the exploitation of solar energy by using the parabolic trough solar concentrator (PTC) to obtain the water steam with a very high temperature at site of Guemar, mandate of El-Oued, in country of Algeria.…”

A numerical analysis of the energy behavior of a parabolic trough concentrator

“…The annual duration of a solar radiation on almost all the national territory exceeds 2000 hours, which can reach 3900 hours (high plains and Sahara). Daily, the solar energy potential given on a horizontal surface of 1 m² is around 5 KWh over most of the country, where we find that the average energy received at the coastal region near 1700 [KWh / m² / year], 1900 [KWh / m² / year] in the highlands, and 2650 [KWh / m² / year] in the south of the country [2,3]. This paper is concerned with examining the effectiveness of a linear solar concentrator of a parabolic trough type.…”