JFAS_Vol 02 N 01

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Browsing JFAS_Vol 02 N 01 by Author "Baba Ahmed, N."

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    Experimental Measurement, Analysis And Modelling Of Dependency Emissivity In Function Of Temperature
    (University of Eloued جامعة الوادي, 2010-01-01) Baba Ahmed, N.; Benmoussat, A.; Benouaz, T.
    We propose a direct method of measurement of the total emissivity of opaque samples on a range of temperature around the ambient one. The method rests on the modulation of the temperature of the sample and the infra-red signal processing resulting from the surface of the sample we model the total emissivity obtained in experiments according to the temperature to establish linear correlations. This leads us to apply the method of optimal linearization associated the finite element method with the nonlinear problem of transfer of heat if thermal conductivity, the specific heat and the emissivity of studied material depend on the temperature. We obtain a good agreement between the resolution of the nonlinear equation of heat and the results obtained by the experimentation.
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    Study On The Energetic Parameters In A Photothermic Sensor With Black Polymeric Film
    (University of Eloued جامعة الوادي, 2010-01-01) Benmoussat, A.; Baba Ahmed, N.; Ainad Tabet, S.; Belahcene, B.
    Renewable energies such as thermal solar energy are accessible energy hydrous for desalination water, recycling and hot water production. Heat is produced by greenhouse effect in the sensor. It is no polluting form of energy according to the sustainable development. In this paper the design of sensor photothermic prototype with polymeric film absorbing, the materials radiation properties, the analysis of different energy losses in the system and the energy balance will be presented. The evolution of incidental solar illumination on the horizontal plan of sensor and the temperature distribution are studied. Results showed that the temperature obtained by thermal conversion depends on the absorbing characteristics of the polymeric film, radiation intensity and time exposure