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Metal foam regenerators; heat transfer and storage in porous metals

Published online by Cambridge University Press:  17 June 2013

Farzad Barari ,
Erardo Mario Elizondo Luna ,
Russell Goodall  and
Robert Woolley
Farzad Barari*
Affiliation:
Department of Mechanical Engineering, The University of Sheffield, Sheffield, S1 3JD, United Kingdom
Erardo Mario Elizondo Luna
Affiliation:
Department of Materials Science and Engineering, The University of Sheffield, Sheffield, S1 3JD, United Kingdom
Russell Goodall
Affiliation:
Department of Materials Science and Engineering, The University of Sheffield, Sheffield, S1 3JD, United Kingdom
Robert Woolley
Affiliation:
Department of Mechanical Engineering, The University of Sheffield, Sheffield, S1 3JD, United Kingdom
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

Open pore metal foams may be of interest as regenerators because of their large specific surface area and their high porosity. In this experiment, three aluminum foam samples (pore size 2–2.36 mm and around 65% porosity) were manufactured by the replication process. The volumetric heat transfer coefficient and number of transfer units (NTU) of the foams and a packed bed of steel ball bearings (2 mm diameter) were determined using a single-blow transient technique over the range 500 < Rem < 1400. The NTU values of the foams and ball bearings both reduced with increasing Reynolds number (flow velocity). The pressure drop across the matrices increased with the velocity, though the values for the metal foams were much lower than that of the ball bearings, indicating that they may have potential for this type of application.

Type
Invited Feature Paper
Information
Journal of Materials Research , Volume 28 , Issue 17: Focus Issue: Advances in the Synthesis, Characterization, and Properties of Bulk Porous Materials , 14 September 2013 , pp. 2474 - 2482
Copyright
Copyright © Materials Research Society 2013 

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