Abo Bibliothek: Guest
Digitales Portal Digitale Bibliothek eBooks Zeitschriften Referenzen und Berichte Forschungssammlungen
Journal of Enhanced Heat Transfer
Impact-faktor: 1.406 5-jähriger Impact-Faktor: 1.075 SJR: 0.287 SNIP: 0.653 CiteScore™: 1.2

ISSN Druckformat: 1065-5131
ISSN Online: 1563-5074

Volumes:
Volumen 27, 2020 Volumen 26, 2019 Volumen 25, 2018 Volumen 24, 2017 Volumen 23, 2016 Volumen 22, 2015 Volumen 21, 2014 Volumen 20, 2013 Volumen 19, 2012 Volumen 18, 2011 Volumen 17, 2010 Volumen 16, 2009 Volumen 15, 2008 Volumen 14, 2007 Volumen 13, 2006 Volumen 12, 2005 Volumen 11, 2004 Volumen 10, 2003 Volumen 9, 2002 Volumen 8, 2001 Volumen 7, 2000 Volumen 6, 1999 Volumen 5, 1998 Volumen 4, 1997 Volumen 3, 1996 Volumen 2, 1995 Volumen 1, 1994

Journal of Enhanced Heat Transfer

DOI: 10.1615/JEnhHeatTransf.v24.i1-6.220
pages 403-420

POROUS COUNTERFLOW HEAT EXCHANGER MODEL: EXPERIMENTAL AND NUMERICAL INVESTIGATION

Jose C. F. Pereira
Mechanical Engineering Department Instituto Superior Tecnico Av. Rovisco Pais, 1049-001 Lisboa Portugal
Mário Costa
IDMEC, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal
Isabel Malico
Department of Physics, University of Évora, R, Romão Ramalho, 59, 7000-671, Évora, Portugal ; IDMEC/IST, Department of Mechanical Engineering, Technical University of Lisbon, Av. Rovisco Pais, 1049-001 Lisbon, Portugal

ABSTRAKT

An experimental and numerical investigation was performed in order to evaluate the performance of several heat transfer sub-models for conduction, convection and radiation in the prediction of flow and heat transfer through 10 ppi Al2O3 foams with Peclet number based on the pore size o(102). These sub-models comprise either effective conductivity models or two phase (gas and solid) models, corresponding to thermodynamic equilibrium or non-equilibrium assumptions, respectively. Experiments were conducted in a counterflow coaxial heat exchanger, where the hot outer air, flowing at a maximum temperature of 800°C, heats the counter cold inner pipe water flow. Temperature measurements were obtained at several locations inside the porous media, pipe walls and inlet/outlet ports. Two-dimensional finite volume calculations of the coupled phenomena in the full geometrical configuration of the heat exchanger were performed.
This study shows that the effective conductivity sub-models derived for packed beds of spheres and arrays of cylinders do not provide satisfactory solutions when applied to ceramic foams. An inverse method was used to estimate the effective conductivity and contact resistance between the porous media and the inner pipe as a function of the reference temperature. Two phase flow models were scrutinised in order to discuss the influence of the relevant heat transfer parameters.


Articles with similar content:

Experimental and Numerical Investigation of a Porous Counterflow Heat Exchanger Model
Journal of Enhanced Heat Transfer, Vol.8, 2001, issue 3
Jose C. F. Pereira, Isabel Malico, Mário Costa
AN EXPERIMENTAL AND NUMERICAL INVESTIGATION OF MIXED CONVECTION IN A POROUS MEDIUM BETWEEN VERTICAL CONCENTRIC CYLINDERS
International Heat Transfer Conference 9, Vol.2, 1990, issue
R. Golightly , Randy C. Clarksean, Robert F. Boehm
NANOFLUIDS FLOW SIMULASION AS THE FLOW THROUGH THE POROUS MEDIA
ICHMT DIGITAL LIBRARY ONLINE, Vol.0, 2014, issue
Anchasa Pramuanjaroenkij, Sadik Kakac, Apichart Chaengbamrung , Amarin Tongkratoke
NUMERICAL MODELING OF INERTANCE TUBE PULSE TUBE REFRIGERATOR
ICHMT DIGITAL LIBRARY ONLINE, Vol.13, 2008, issue
Subhash Jacob, G.S.V.L. Narasimham, T. R. Ashwin
A FEASIBILITY STUDY OF EMPLOYING SEQUENTIAL FUNCTION SPECIFICATION METHOD FOR ESTIMATION OF TRANSIENT HEAT FLUX IN A NON-THERMAL EQUILIBRIUM POROUS CHANNEL
Journal of Porous Media, Vol.14, 2011, issue 5
Farshad Kowsary, Mohsen Nazari