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ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
COMPARATIVE STUDY OF GEOTHERMAL AND CONVENTIONAL AIRCONDITIONER: A CASE OF STUDY FOR OFFICE APPLICATIONS
Submission Author:
Willian Moreira Duarte , MG , Brazil
Co-Authors:
Willian Moreira Duarte, Tiago de Freitas Paulino, Sinthya Tavares, André Gonçalves de Oliveira, Luiz Machado
Presenter: Willian Moreira Duarte
doi://10.26678/ABCM.ENCIT2020.CIT20-0071
Abstract
The high cost of electricity has done that the air condition sector search for alternatives to produce coldefficiently. It is a necessity, especially in Brazil, where 17% of the total electricity consume is due air condition systems.Many studies have presented technical-economic data of heat-pumping and air conditioner systems but there is a lack ofstudies that consider applications with only cooling demand. This work presents a comparative analysis of conventionaland a ground source air conditioning system. The geothermal air conditioner used an open loop water. The systems aredesign and simulated for cooling an office considering the climate of Belo Horizonte, Brazil using weather data obtainedfrom June of 2019 to May of 2020. The refrigerant and expansion device chosen was the R410A and capillary tubedue availability of commercial components. In order to evaluate the performance of the geothermal and conventionalair conditioner a quasi-steady-state model was developed using the Equation Engineering Solver (EES). The results arepresented for twelve different scenarios based in three water well temperatures and four water well depth. In the bestscenario, the geothermal system has annual energy consumption 33% lower than convention system and a payback timeof 1.7 years.
Keywords
Geothermal, HVAC, mathematical model, Payback
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