Thermo-hydraulic design of earth-air heat exchangers

A thermo-activated wall for load reduction and supplementary cooling with free to low-cost thermal water

“…The outlet water temperature of the capillary network can be computed by the lumped parameter method as follows [26,27]:…”

Simulation of a passive ground-coupled cooling system for a room in a hot humid climate

“…Therefore, equation (7) is applied to each of those segments, however, the total length of pipe required needs to be determined. There have also been studies that used one-dimensional analytical method to determine the physical characteristics of the EAHX, De Paepe and Janssens [19] where the equation (7) above was rearranged and used it to find a non-dimensionless group called the number of transfer units (NTU). This is dependent on the convective heat coefficient of the air in the tube, the area of heat transfer surface and the air mass flow rate.…”

“…The convective heat transfer coefficient for the tubular section is however influenced by both the Nusselt (Nu) and Reynolds numbers (Re) as calculated by Gnielinski [20] If Re 2300 (12) Another parameter that is important for designing the EAHX is the pressure drop (Δp) across the tube, which has a linear relationship with the length of the tube and the specific pressure drop (J) that is necessary to realize a unit of the NTU and has an inverse relation with it as pointed out by De Paepe and Janssens [21].…”

Usando séries temporais obtidas experimentalmente como condições de contorno para a simulação numérica de trocadores de calor solo-ar

“…Por outro lado, importantes recomendações de leitura sobre o princípio de funcionamento do TCSA podem ser visualizadas em [10,11,12]. Essa bibliografia inicial apresenta aspectos fundamentais para a compreensão dos fenômenos físicos presentes no estudo de TCSA, bem como princípios essenciais para sua modelagem.…”