Metadata 2017

Figure 2.26 from the SPBA: Heat-flow density (uncorrected). Data sources: Hurtig et al.(1991/1992); Hurter & Haene (2002); The Global Heat Flow Database of The International Heat Flow Commission. Site: www.heatflow.und.edu/index2.html.

Figure 2.27 from the SPBA: Temperature level at 1000 m. Data sources: Belgium – Legrand (1975); Vandenberghe & Fock (1989); Netherlands – temperature data from bottom-hole temperature measurements (from TNO); Germany – Schellschmidt (2007); Poland – deep drillhole temperature data from Polish geothermal database (Polish Geological Institute).

Figure 2.28 from the SPBA: Temperature level at 2000 m. Data sources: Belgium – Legrand (1975); Vandenberghe & Fock (1989); Netherlands – temperature data from bottom-hole temperature measurements (from TNO); Germany – Schellschmidt (2007); Poland – deep drillhole temperature data from Polish geothermal database (Polish Geological Institute).

Figure 2.29 from the SPBA: Temperature level at 3000 m. Data sources: Belgium – Legrand (1975); Vandenberghe & Fock (1989); Netherlands – temperature data from bottom-hole temperature measurements (from TNO); Germany – Schellschmidt (2007); Poland – deep drillhole temperature data from Polish geothermal database (Polish Geological Institute).

Specific annual thermal energy content for heating and / or cooling referring per surface area for borehole heat exchangers at a defined length.

Energy content available per year in a defined volume of a groundwater body for heating and/or cooling applications

Maximum yield or pumping rate of a groundwater well doublet per square meter at a given location.

Specific thermal capacity per surface area unit for borehole heat exchangers of a defined length.

Thermal capacity of a well doublet for heating and/or cooling depending on the hydraulic productivity and the thermal productivity.

Extracted water volume per hour and meter drawdown for a defined well diameter.