Inscrição na biblioteca: Guest
Portal Digital Begell Biblioteca digital da Begell eBooks Diários Referências e Anais Coleções de pesquisa
International Journal of Fluid Mechanics Research
ESCI SJR: 0.206 SNIP: 0.446 CiteScore™: 0.5

ISSN Imprimir: 2152-5102
ISSN On-line: 2152-5110

Volumes:
Volume 47, 2020 Volume 46, 2019 Volume 45, 2018 Volume 44, 2017 Volume 43, 2016 Volume 42, 2015 Volume 41, 2014 Volume 40, 2013 Volume 39, 2012 Volume 38, 2011 Volume 37, 2010 Volume 36, 2009 Volume 35, 2008 Volume 34, 2007 Volume 33, 2006 Volume 32, 2005 Volume 31, 2004 Volume 30, 2003 Volume 29, 2002 Volume 28, 2001 Volume 27, 2000 Volume 26, 1999 Volume 25, 1998 Volume 24, 1997 Volume 23, 1996 Volume 22, 1995

International Journal of Fluid Mechanics Research

DOI: 10.1615/InterJFluidMechRes.v43.i5-6.100
pages 503-520

Transient Models to Analyze the Influence of the Air Velocity and Ducts Diameter on the Performance of Earth-Air Heat Exchangers

R. S. Brum
Instituto de Fısica e Matematica, Universidade Federal de Pelotas Pelotas, Brazil, Campus Capao do Leao s/n, 96.160-000; Programa de Pos-Graduacao em Engenharia Mecanica, Universidade Federal do Rio Grande do Sul Porto Alegre, Brazil, Rua Sarmento Leite, 425, 90.050-170
J. V. A. Ramalho
Instituto de Fısica e Matematica, Universidade Federal de Pelotas Pelotas, Brazil, Campus Capao do Leao s/n, 96.160-000
Luiz Alberto O. Rocha
Programa de Pos-Graduacao em Engenharia Mecanica, Universidade Federal do Rio Grande do Sul Porto Alegre, Brazil, Rua Sarmento Leite, 425, 90.050-170
L. A. Isoldi
Universidade Federal do Rio Grande (FURG), Escola de Engenharia (EE), Programa de Pos-Graduacao em Engenharia Oceanica (PPGEO), Rio Grande, Rio Grande do Sul, Brazil
E. D. dos Santos
Universidade Federal do Rio Grande (FURG), Escola de Engenharia (EE), Programa de Pos-Graduacao em Engenharia Oceanica (PPGEO), Rio Grande, Rio Grande do Sul, Brazil

RESUMO

A potential sustainable option to improve thermal conditions in buildings is to use the Earth-air heat exchangers (EAHE), i. e., buried ducts where the air is blown to use the soil as a heat or cold sink. Despite being a simple and old technology, the interest for these devices has mainly increased in the last decades, accompanying global concerns with the use of renewable sources of energy and the advances in computer simulations. In countries like Brazil, the research about them is very limited, and their installations are just beginning. This paper aims to study the thermal performance of EAHE, under the variations of ducts diameter and the air velocity crossing them, adopting climatic and soil parameters found in experimental data from the south of Brazil. The thermal fields are computed using a validated complete model, and the results are used to find new sine-based models describing the thermal potential of EAHE, through which analytical analysis are made. From the study of the energy performance, significant improvement in thermal conditions can be obtained in the local summer at low energy consumption.