Thermal degasification of ammonia in a porous generator
Por:
Sen M., Best R., Pilatowsky I.
Publicada:
1 ene 1987
Resumen:
Solid generators are often used in mechanically simple refrigeration systems and thermochemical energy storage devices. In this work we analyze the heat and mass transfer associated with the desorption of ammonia in calcium chloride ammoniate due to the application of heat. The ammoniate is in solid phase in the form of a porous matrix and the ammonia gas that is generated by the degasification filters through it due to the pressure gradient generated by the degasification. Assuming chemical equilibrium between reactants and products, as well as Darcy's law for flow through porous media, a simplified model of the process is developed. A strongly nonlinear diffusion equation is obtained under a constant specific heat and molecular mass approximation. Numerical solutions of this diffusion equation for a semi-infinite slab are examined. Qualitative information has been obtained on the kind of heating that is desirable. © 1987 Martinus Nijhoff Publishers.
Filiaciones:
Sen M.:
Department of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, 46556, IN, United States
Best R.:
Laboratorio de Energía Solar, Instituto de Investigaciones en Materiales, U.N.A.M., Temixco, Mor., 62580, Mexico
Pilatowsky I.:
Laboratorio de Energía Solar, Instituto de Investigaciones en Materiales, U.N.A.M., Temixco, Mor., 62580, Mexico
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