REVUE INTERNATIONALE D'HÉLIOTECHNIQUE N° 42 (2010) 25-30
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MODELING WATER ACTIVITY AND ENTHALPY OF THE DESORPTION OF WATER MARJORAM (ORIGANUM MAJORANA)
A. BENHAMOU1, A. IDLIMAM2, M. KOUHILA2, B. ZEGHMATI3, B. BENYOUCEF4
1 Dynamic motors and vibroacoustic laboratory University of Boumerdes , Algeria
2 Solar energy and Medicinal Plants laboratory, Superior Normal School of Marrakech, Morocco
3 Mathematical and physical systems laboratory, University of Perpignan, France
4 Material and renewable energies laboratory, University of Tlemcen, Algeria
Contact: benhamouamina@gmail.com
Reçu le 27avril 2010, accepté 31 mai 2010, en ligne le 7 juin 2010
The relationship between moisture marjoram, humidity and temperature are important for the design and modeling methods of drying and storage. In this work, it is proposed to be determined experimentally by the gravimetric method, and at different temperatures, the desorption isotherms marjoram. These isotherms are used to determine the temperature and moisture content to reach final at the end of a drying operation of this product in order to ensure its stability physical, chemical and biological during storage. The nature of the interaction-product water is highlighted in the enthalpy of desorption. The study confirms that the thermal properties of marjoram depend on its moisture content.
Keywords: Marjoram; Water Activity; Heat; Property thermal desorption; simulation model;