Inscrição na biblioteca: Guest
Portal Digital Begell Biblioteca digital da Begell eBooks Diários Referências e Anais Coleções de pesquisa
Journal of Porous Media
Fator do impacto: 1.49 FI de cinco anos: 1.159 SJR: 0.43 SNIP: 0.671 CiteScore™: 1.58

ISSN Imprimir: 1091-028X
ISSN On-line: 1934-0508

Volumes:
Volume 22, 2019 Volume 21, 2018 Volume 20, 2017 Volume 19, 2016 Volume 18, 2015 Volume 17, 2014 Volume 16, 2013 Volume 15, 2012 Volume 14, 2011 Volume 13, 2010 Volume 12, 2009 Volume 11, 2008 Volume 10, 2007 Volume 9, 2006 Volume 8, 2005 Volume 7, 2004 Volume 6, 2003 Volume 5, 2002 Volume 4, 2001 Volume 3, 2000 Volume 2, 1999 Volume 1, 1998

Journal of Porous Media

DOI: 10.1615/JPorMedia.v16.i11.30
pages 997-1010

THREE-DIMENSIONAL NUMERICAL SIMULATION OF A THREE-LAYERED RADIANT POROUS HEAT EXCHANGER WITH VARIABLE GAS PROPERTIES

Mohammad Sajedi
Mechanical Engineering Department, Shahid Bahonar University, Kerman, Iran
S. A. Gandjalikhan Nassab
Mechanical Engineering Department, School of Engineering, Shahid Bahonar University of Kerman, Kerman, Iran
E. Jahanshahi Javaran
Mechanical Engineering Department, Shahid Bahonar University, Kerman, Iran

RESUMO

This paper deals with the thermal analysis of a new type of porous heat exchanger (PHE). This system operates based on energy conversion between gas enthalpy and thermal radiation. The proposed PHE has one high temperature (HT) and two heat recovery (HR1 and HR2) sections. In the HT section, the enthalpy of flowing high temperature gas that is converted to thermal radiation emitted towards the two heat recovery sections where the reverse energy conversion from thermal radiation to gas enthalpy occurs. In each section, a 3D cubic porous layer which is assumed to be absorbing, emitting and scattering is presented. For theoretical analysis of the PHE, the gas and solid phases are considered in nonlocal thermal equilibrium and separate energy equations are used for these two phases. For thermal analysis of the proposed PHE, the coupled energy equations for the gas and porous layer at each section are numerically solved using the finite difference method. The radiative transfer equation is solved by the discrete ordinates method (DOM) to compute the distribution of radiative heat flux in the porous layer. The numerical results consist of the gas and porous temperature distributions. The variations of radiative heat flux and gas property are also presented. Furthermore, the effects of scattering albedo, optical thickness and inlet gas temperature on the efficiency of the proposed PHE are investigated. It is shown that this type of porous heat exchanger has a very high efficiency especially when the porous layers have high optical thickness. The present results are compared with those reported theoretically by other researchers and good agreement is found.


Articles with similar content:

COMPARISON OF GLOBAL NON-GRAY GAS MODELS FOR RADIATION IN PARTICIPATING MEDIUM
Proceedings of the 24th National and 2nd International ISHMT-ASTFE Heat and Mass Transfer Conference (IHMTC-2017), Vol.0, 2017, issue
Thirumalachari Sundararajan, Shashikant Cholake, S.P. Venkateshan
Heat Transfer Through Fiberglass Insulation
International Heat Transfer Conference 7, Vol.5, 1982, issue
Seppo Antero Korpela, R. L. Houston
COMPARISON OF RADIATIVE HEAT TRANSFER MODELS IN MINERAL WOOL AT ROOM TEMPERATURE
ICHMT DIGITAL LIBRARY ONLINE, Vol.6, 1997, issue
S. Dyrbol, F. M. B. Andersen
NUMERICAL SIMULATION OF REACTING FLOWS AND NITRIC OXIDE FORMATION IN RADIANT POROUS BURNERS
International Heat Transfer Conference 13, Vol.0, 2006, issue
Karam Ramzy Beshay, Y. Li, M. M. M. Abou-Ellail, Timothy W. Tong
EXPERIMENTS ON THE PERMEABILITY LIMITS OF TIGHT OIL RESERVOIRS FOR GAS FLOOD RECOVERY
Special Topics & Reviews in Porous Media: An International Journal, Vol.7, 2016, issue 4
Zhengming Yang, Xuewei Liu, Ying He, Lijun Lin, Junchang Sun, Hekun Guo