May 2014

Study of vibrations by Raman spectroscopy low frequencies of the phase transition in pyridinium picrate (C6H2N3O7)-.(C5H6N)+

The spectra of the crystals of pyridine picrate crude formula, C11H8N4O7, in the mid infrared (IR) and Raman are studied as a function of temperature. They show some changes, which allowed us to first track and describe the structural changes (in both directions under the effect of heat treatment) accompanying the phase transition between 358 and 383K observed by DSC, Rx. After gradual cooling, the reversibility of the...

Author(s): AZIZI Abdelkader and MEDDOUR Athmane

May 2014

Analysis and supervision of the water extraction of a thermal power plant

The aim of this paper is to analysis the water treatment process in a thermal power plant (TPP). In fact, we present an application of a supervisory control and data acquisition (SCADA) system. Thus, an example of a SCADA system of the center of RADES in Tunisia was presented. Our contribution in this work consists in the analysis of the water loss in the TPP on the one hand and the supervision of the water extraction...

Author(s): M. N. Lakhoua

May 2014

Simulation analysis of the effect graded Zn(O,S) on the performance of the ultra thin copper indium gallium diselenide (CIGS) solar cells

This paper indicated a numerical modeling of ultra thin copper indium gallium diselenide (CIGS) solar cells. An optimum value of the thickness of the structure has been calculated and it is shown that by optimizing the thickness of the cell, efficiency has been increased and cost of production can been reduced. Numerical optimizations have been done by adjusting parameters such as thickness of the layers and the gap. It...

Author(s): Chihi Adel, Boujmil Mohamed Fethi and Bessais Brahim