Ground source heat pumps are often coupled with vertical boreholes in order to heat and
cool buildings. As the maximum depth of boreholes has increased, the ranges of …

The present paper introduces new concepts related to the modeling of vertical Borehole
Heat Exchangers for Ground Coupled Heat Pump applications. A sensitivity analysis on how …

Soil thermal properties are essential for investigating the thermal performance of many kinds
of underground thermal engineering structure. To investigate the influences of …

Thermal response tests are used to assess the subsurface thermal conductivity to design
ground-coupled heat pump systems. Conventional tests are cumbersome and require a …

After the closure of coal mining in the northwestern German coalfields the further utilization
of mines ie, for geothermal applications is currently discussed. Recent exploration activities …

Obtaining in situ thermal properties of soils is often difficult and time-consuming. Here, cone
penetration test (CPT) correlations are proposed and validated for thermal properties of …

Undisturbed ground temperature (UGT), thermal conductivity (TC) and heat capacity (HC)
are essential parameters to design geothermal heat pumps and underground thermal …

Thermal response tests (TRTs) are performed on borehole heat exchangers in order to
evaluate ground and borehole thermal properties, which are needed in the design of ground …

Thermal conductivity of rocks defined as the ability of rocks to transmit heat, can indicate the
potential for geothermal resource in a given location. While direct laboratory core sample …

After the closure of an underground mine, tunnels commonly become flooded and can be
potentially exploited for its geothermal resource. Developing new methods for quantifying …