Fitting new constructal models for the thermal potential of earth-air heat exchangers

被引：8

作者：

de Alencar Ramalho, Jairo Valoes ^{[1
]}

Brum, Ruth da Silva ^{[2
]}

Oliveira Rocha, Luiz Alberto ^{[2
]}

Isoldi, Liercio Andre ^{[3
]}

dos Santos, Elizaldo Domingues ^{[3
]}

Sulzbacher, Mariane ^{[1
]}

机构：

[1] Univ Fed Pelotas, Inst Fis Matemat, Campus Capao do Leao S-N, BR-96160000 Pelotas, RS, Brazil

[2] Univ Fed Rio Grande do Sul, Programa Posgrad Engn Mecan, Porto Alegre, RS, Brazil

[3] Univ Fed Rio Grande, Escola Engn, Rio Grande, RS, Brazil

来源：

ACTA SCIENTIARUM-TECHNOLOGY | 2018年 / 40卷

关键词：

constructal design; Eahe; energy performance; numerical simulation; DESIGN;

D O I：

10.4025/actascitechnol.v40i1.30897

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Relying on the Constructal Design method, this paper introduces new periodic models for the thermal potential of Earth-Air Heat Exchangers (Eahe). As a case study, it analyses the best spacing for three ducts arranged triangularly in order to maximize the heat transfer between soil and air. More specifically, the ratio s between the horizontal and vertical spaces among the ducts is set free to vary up to limiting global constraints. This paper aims to better understand how the variations in s affect the thermal performance of Eahe. As an additional contribution, some relationships between s and the thermal potential of Eahe are mathematically and continuously stated. This allows establishing additional results for the efficiency and energetic performance of Eahe, as well as recommend arrangements in the shape of isosceles triangles with base and height unitary.

引用

页数：8

共 21 条

[1]

Bejan A., 1997, ADV ENG TERMODYNAMIC

[2]

Bejan A., 2008, DESIGN CONSTRUCTAL T

[3]

Bejan Adrian., 2012, Design in Nature

[4] Constructal H-shaped cavities according to Bejan's theory [J].

Biserni, C. ;

Rocha, L. A. O. ;

Stanescu, G. ;

Lorenzini, E. .

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2007, 50 (11-12) :2132-2138

[5]

Brum R. S., 2012, International Journal of Advanced Renewable Energy Research, V1, P505

[6]

Brum R. S., 2013, THERM ENG, V12, P63

[7] A Matlab code to fit periodic data [J].

Brum, Ruth da Silva ;

de Alencar Ramalho, Jairo Valoes ;

Oliveira Rocha, Luiz Alberto ;

Isoldi, Liercio Andre ;

dos Santos, Elizaldo Domingues .

REVISTA BRASILEIRA DE COMPUTACAO APLICADA, 2015, 7 (02) :16-25

[8] A new computational modeling to predict the behavior of Earth-Air Heat Exchangers [J].

Brum, Ruth da Silva ;

Vaz, Joaquim ;

Oliveira Rocha, Luiz Alberto ;

dos Santos, Elizaldo Domingues ;

Isoldi, Liercio Andre .

ENERGY AND BUILDINGS, 2013, 64 :395-402

[9]

Bulmer M. G., 1979, PRINCIPLES STAT

[10] Natural constructal emergence of vascular design with turbulent flow [J].

Cetkin, E. ;

Lorente, S. ;

Bejan, A. .

JOURNAL OF APPLIED PHYSICS, 2010, 107 (11)

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