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  • Author: István Bodnár x
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Designing Procedure of Led-Halogen Hybrid Solar Simulator to Small Size Solar Cell Testing

Abstract

During the experimental investigation of solar cells, the quality of the illumination is essential. In the case of solar simulators, the main goal is the accurate reproduction of sunlight. The designing procedure of a halogen LED hybrid solar simulator is described in this article. One of the main goals is the compliance with the relevant standard (ASTM E972).

Open access
Examination of Acacia-Tree Gasification Process Under Varying Operating Parameters

Abstract

This paper presents the thermokinetic modeling of the gasification process performed on the acacia-tree under varying operating circumstances and different humidity levels. Gasification does not produce flue gas, but due to imperfect burning, synthesis gas appears which is rich in flammable components (CO2 and H2). The chemical structure of this gas depends on the components of the fuel and the humidity level, but is also greatly affected by the technological parameters, such as pressure and temperature, as well as the air-ratio. The study shows the change of chemical composition, fuel value and the reaction efficiency as a function of varying gasification temperature and pressure. Rising temperature results in improved efficiency, while higher pressure worsens reaction efficiency. However, at higher temperature intervals, the effect of the pressure is neglectable.

Open access