Comparisons of deep well and insulated shallow earth storage of solar heat

Pneumatic and thermal design procedure and analysis of earth-to-air heat exchangers of registry type

“…The EAHE operation model needs the temperature distribution in the soil and generally this implies solving a couple set of energy and mass balance equations [15,16]. A number of simplifying assumptions are usually accepted [17,18]. First, the soil is assimilated to a homogeneous and isotropic media.…”