A first study on earth-air heat exchanger in Pelotas

Eduardo de Sá Bueno Nóbrega, Ruth da Silva Brum, Jairo Valões de Alencar Ramalho, Régis Sperotto Quadros

Resumo


Earth-air heat exchangers (EAHE) represent a promising option to reduce the
heating/cooling load of buildings. Unlike traditional air conditioning systems, the EAHE employ a renewable source of energy and they can work using low electric power. Basically, EAHE employ underground ducts where the air is blown to exchange heat with the ground. Since the superficial layers of the Earth are warmer than outside air in winter and cooler than it in summer, the soil can
be used as a heat source or sink. Therefore, the air leaves the ducts at milder temperatures. Recent research has shown that the Brazilian south region, where prevails a subtropical climate, has a high potential for the use of EAHE. However, such references are still very limited. Hence, this work aims to analyze the thermal performance of EAHE considering the city of Pelotas, located in the south Brazilian state of Rio Grande do Sul. As a case study, we used in situ data, covering the
soil geotechnical profiles from a site in the city, which were obtained by a standard penetration test (SPT). To make the computer simulations, we used an analytical model, which was previously tested and validated. The results point out good prospects for the installation of these devices in the city of Pelotas, taking advantage of its geological potential

Palavras-chave


Earth-air heat exchangers (TCSA); Simulation models; Geologic potential; Sustainability

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DOI: http://dx.doi.org/10.21575/25254782rmetg2020vol5n61336

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Direitos autorais 2020 Eduardo de Sá Bueno Nóbrega, Ruth da Silva Brum, Jairo Valões de Alencar Ramalho, Régis Sperotto Quadros

Revista Mundi Engenharia, Tecnologia e Gestão ISSN 2525-4782

Qualis: B4 - Interdisciplinar, B5 - Geografia, B5 - Administração Pública e de Empresas, Ciências Contábeis e Turismo, B5 - Comunicação e Informação, B5 - Engenharias III