The influence of soil moisture transfer on building heat loss via the ground

Abstract

In this paper, the influence of soil moisture transfer on building heat loss via the ground is investigated by comparing fully coupled simulations with linear thermal simulations. The observed influences of coupling are (1) the larger amplitude of surface temperature, (2) the variation of thermal conductivity with moisture content, and (3) the advection of sensible heat by liquid transfer. In a parameter study, it is shown that these conclusions hold for a variety of climates, soils and foundation constructions. However, given the current accuracy level of standard methods, the integration of coupling effects in these calculation methods cannot be defended.

Combined Effects of Mulch and Tillage on Soil Hydrothermal Conditions under Drip Irrigation in Hetao Irrigation District, China

“…Soil thermal conductivity and capacity highly rely on soil moisture and movement of soil water leads to thermal storage or transfer [42]. In addition, evaporation normally plays a crucial role in surface heat balance of dry area.…”

Hygrothermal Simulation of Foundations: Part 1 - Soil Material Properties

“…A computational approach for heat transfer through the ground has been well defined (EN ISO 13370:2007, and simplified methods have been developed (Staszczuk, Radon, and Holm 2010). However, these approaches generally ignore the transfer of soil moisture, which is not negligible (Janssen, Carmeliet, and Hens 2004).…”

Wind-driven rain as a boundary condition for HAM simulations: Analysis of simplified modelling approaches

“…Different models exist for the calculation of sky temperatures: a comparison in [24] indicated that the deviations are not that large. The model presented in this paper applies: (16) A model relating the cloudiness cf to the short-wave radiation was presented by Kasten and Czeplak [26], but was shown to give erroneous results in [24]. The cloudiness factors are thus adopted from solar radiation measurements [27], which though only allow deriving a year-averaged value.…”

“…Ground surface temperature is taken equal to the air temperature, based on [24,25]. Different models exist for the calculation of sky temperatures: a comparison in [24] indicated that the deviations are not that large. The model presented in this paper applies: (16) A model relating the cloudiness cf to the short-wave radiation was presented by Kasten and Czeplak [26], but was shown to give erroneous results in [24].…”