Mathematical modelling and optimisation of a solar collector performances
Journal Title: Journal of New technology and Materials - Year 2017, Vol 7, Issue 1
Abstract
Although a lot of research work has been performed in the field of renewable energy, this domain of research has received, with the recent technological developments, a significant turnover both on the theoretical and experimental sides. At low temperatures, the solar collector plays the role of a converter of solar radiation into heat. Our work focuses on the study of the dynamics and thermal transport phenomena in the air gap of a solar collector in order to optimize its performance. The evolution of thermal and dynamic profiles in the air gap is presented in this paper, which allows us to quantify the convective energy losses. The impact of the interposition of partitions in the air gap was analyzed as well. The influence of this new model on convection losses turns out to be significant.
Authors and Affiliations
M. Dahmani, B. Adouane, F. Z. Ferahta, Z. Aouachria
Removal of lead ions using a cellulose acetate/ zeolite composite membrane and their analyzes by inverse voltammetry
Zeolitic faujasite Y type was prepared from the crystallization of the gel resulting from the combination of the solutions of silica and alumina. Its structure was characterized by XRD, SEM, BET, ATR-FTIR, and elementary...
Dependence of hardness to the applied load of the 42CrMo4 steel manufactured by MIM process
For the purposes of this article the hardness of material 42CrMo4 steel which is manufactured by metal injection molding (MIM) process was measured by Vickers method. When determining hardness the following loads: 196,1;...
Modeling of 2D photonic crystals waveguides
Abstract Photonic crystals are nanometric structures which are composed of periodic elements of different permittivity in two or three dimensions. The periodic variation of the refractive index prevents the propagation o...
Getting ferromagnetic metallic nanofilms for information recording on the magnetic moments of the electrons
The ferromagnetic nanofilms are promising for recording information by means of electron spins. The preparation of such films is technologically very cheap. It is assumed in such matrices can be a huge recording density...
Experimental study of solar drying of Tunisian phosphate: in open sun, under greenhouse and by a parabolic concentrator
This work is part of operating a parabolic concentrator for drying the phosphate. This study is to analyzing the drying of Tunisian phosphate by three separate solar processes. Two experimental devices have been implemen...