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ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
STUDY ABOUT THE SOIL TEMPERATURE STABILIZATION TIME IN AN EARTH-AIR HEAT EXCHANGER COMPUTATIONAL MODELING
Submission Author:
Lucas Costa Victoria , RS
Co-Authors:
Lucas Costa Victoria, Igor Vaz, Luiz Alberto Oliveira Rocha, Elizaldo dos Santos, Michel Kepes Rodrigues, Liércio Isoldi
Presenter: Lucas Costa Victoria
doi://10.26678/ABCM.ENCIT2020.CIT20-0186
Abstract
Earth-Air Heat Exchangers (EAHE) are equipment used to reduce electrical consumption usage by traditional air conditioning systems aiming to maintain thermal comfort in buildings. In this way, EAHE studies are developed with the purpose of improve constructive and operational parameters, and hence its performance. A widely used approach to this is the computational modeling. Therefore, the goal of the present work is to develop an investigation that allows the reduction of the time needed for the soil temperatures stabilization, without significant loss in thermal behavior of the EAHE. Nowadays, based on the literature, the numerical simulations of EAHE are performed during 2 years, being the first year used only to guarantee an adequate soil temperature distribution. From that, here numerical simulations adopting 1 year and 6 months, 1 year and 3 months and 1 year and 1 month were proposed in comparison with the one using 2 years. Results show a variation between 34.24 and 52.94% of reduction in processing time for a typical EAHE case with losses of accuracy in an order of only 0.69 to 3.38%.
Keywords
Earth-Air Heat Exchangers (EAHE), Computational modeling, Numerical simulation, Finite volume method
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