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

Autores

  • Jairo Valões de Alencar Ramalho Universidade Federal de Pelotas Autor
  • Ruth da Silva Brum Universidade Federal do Rio Grande do Sul Autor
  • Luiz Alberto Oliveira Rocha Universidade Federal do Rio Grande do Sul Autor
  • Liércio André Isoldi Universidade Federal do Rio Grande Autor
  • Elizaldo Domingues dos Santos Universidade Federal do Rio Grande Autor
  • Mariane Sulzbacher Universidade Federal de Pelotas Autor

DOI:

https://doi.org/10.4025/actascitechnol.v40i1.30897

Palavras-chave:

constructal design, Eahe, energy performance, numerical simulation.

Resumo

 

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  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  affect the thermal performance of Eahe. As an additional contribution, some relationships between  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.

 

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Publicado

2018-01-01

Edição

Seção

Engenharia Mecânica

Como Citar

Ramalho, J. V. de A., Brum, R. da S., Rocha, L. A. O., Isoldi, L. A., Santos, E. D. dos, & Sulzbacher, M. (2018). Fitting new constructal models for the thermal potential of earth-air heat exchangers. Acta Scientiarum. Technology, 40(1), e30897. https://doi.org/10.4025/actascitechnol.v40i1.30897

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