The current study is dedicated to the realization and development of an ASTM E972 standardized, class C sunlight simulator. Sunlight simulators or sun simulators are laboratory devices used to study solar cells. Our sun simulator is suitable for the examination and qualification of solar cells, with an area of 150 mm x 150 mm. It consists of 4 LED blocks of different colors and a halogen reflector. The completed sun simulator is validated; the design and realized parameters display good matching.

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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).

This paper presents a thermos-kinetical modelling on the gasification process done on the acacia-tree under varying industrial circumstances and different humidity levels. The gasification does not produce flue gas, but due to imperfect burning synthesis gas which is rich in flammable components (CO 2 and H 2). The chemical structure of this gas is depends on the components of the fuel and the humidity levels but greatly affected by the technological parameters, also. Such as parameters are the pressure and the temperature, as well as the air-ratio. The study introduces the changing in the conjunction, the fuel value and the reaction efficiency due to varying gasification temperature and pressure. Rising temperature results in improved efficiency, while the higher pressure worsens the reaction efficiency. However at higher temperature intervals the effect of the pressure is neglect able.