Evaluación de un sistema de enfriamiento radiante acoplado a un intercambiador geotérmico

Tomas Concha; Marcos Hongn; Federico Montenegro

Authors

Tomas Concha Instituto de Investigaciones en Energía No Convencional (INENCO), Grupo de Edificios Bioclimáticos, CONICET
Marcos Hongn Instituto de Investigaciones en Energía No Convencional (INENCO), Grupo de Edificios Bioclimáticos, CONICET; Universidad Nacional de Salta, Facultad de Ciencias Exactas, Departamento de Física e mail: mhongn@unsa.edu.ar
Federico Montenegro Comisión Nacional de Energía Atómica (CNEA), Departamento de Estudios de Reactores y Centrales, División Diseño y Análisis Neutrónico. Centro Atómico Constituyentes. Buenos Aires, Argentina

Keywords:

Horizontal Geothermal Exchanger, Radiant Cooling System, Building Thermal Conditioning

Abstract

Geothermal heat exchangers (GHEs) are systems that leverage the thermal buffering of temperature variations that occur below the soil's surface. This phenomenon can be used, for example, for the thermal conditioning of buildings by coupling the GHEs with thermo-activated radiant systems (TABS).In this work, we evaluated the performance of a horizontal GHE coupled to an experimental test cell with TABS in one of its walls. For this system, a comprehensive thermal model was developed and validated against experimental data. We obtained a good fit with nRMSE% errors below 2.6% for temperatures and less than 14% for heat fluxes.

Subsequently, through a parametric analysis of the integrated system (gTABS), we found that the gTABS's cooling potential can be substantially increased by reducing the incidence of solar radiation on the shallow soil layer where the GHE is located, as well as by implementing appropriate control strategies.