Maximizing Efficiency of Earth-Air Heat Exchangers with Galvanized Blocks

• DOI: 10.4028/p-qs2lqy
• Publication Date: 2023-07-14T15:08:31Z
• Authors: Ana Maria Bersch ...; Jairo Valões de A...; Honório Joaquim F...
• Keywords: 0211 other engineering and technologies; 02 engineering and technology; 7. Clean energy

Earth-air heat exchangers (EAHE) consist of buried ducts and a ventilation system, which require minimal electricity, making them cost-effective sustainable solution for improving the thermal conditions built environments. To enhance efficiency EAHE system optimize its use soil's potential, we employed galvanized block with cross-sectional area 1.5 m 2 around duct. The simulations conducted in this study used climatic data from Viamão, city southern Brazil, demonstrated effectiveness strategy. increased conductivity soil region enabled to utilize higher quantities energy. first part work highlights importance coupling two potentials systems. We also introduce new method calculating throughout year. name it maximum because measures how much potential an installation can extract highest amount available during Subsequently, at different depths evaluate their performance. Our results showed that annual efficiencies significantly addition block. found depth impacts potentials. Specifically, obtained almost 4.0°C 3.8°C (annual RMS) potentials, respectively, 3.5m.