Publication: Exergy optimization in a steady moving bed heat exchanger
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2007
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Blackwell Publishing
New York Academy of Sciences
New York Academy of Sciences
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Abstract
This work provides an exergy analysis of a moving bed heat
exchanger to obtain for a range of incoming fluid flow rates the
operational optimum and the incidence on it of the relevant
parameters such as the dimensions of the exchanger, the
particle diameter and the flow rate of the fluid. The MBHE
proposed can be analyzed as a cross flow heat exchanger where
one of the phases is a moving granular medium. In the present
work the exergy analysis of the MBHE is carried out over
operation data of the exchanger obtained in two ways: a
numerical simulation of the steady state problem and the
analytical solution of the simplified (avoiding conduction
terms) equations. The numerical simulation is carried over the
two steady energy equations (fluid and solid), involving for the
solid the convection heat transfer to the fluid and the diffusion
term in both directions, and for the fluid only the convection
heat transfer to the solid. The analytical solution is the wellknown
solution of the simplified problem neglecting
conduction effects.
Description
Proceedings of: Interdisciplinary Transport Phenomena V: Fluid, Thermal, Biological, Materials and Space Sciences (ITP 2007), 14-19 of October, 2007, Bansko, Bulgaria (Oral paper nº 70)
Keywords
Moving bed, Exergy optimization, Heat exchanger
Bibliographic citation
S.S. Shadhal, ed., Interdisciplinary transport phenomena: fluid, thermal, biological, materials and space sciences (pp. 584-601) . [Proceedings]. Boston, Massachusetts: Blackwell Publishing on behalf of New York Academy of Sciences, 2009