Thermally Affected Zone (TAZ) Assessment in Open-Loop Low-Enthalpy Groundwater Heat Pump Systems (GWHPs): Potential of Analytical Solutions

Table 2

Thermal and hydrodynamic parameters used as input data in FEFLOW modelling (unit 1 and unit 2) [12].

Parameter	Symbol	Unit of measure	Test site value
Unit 1
Horizontal hydraulic conductivity		[ms^-1]	0.0025
Vertical hydraulic conductivity		[ms^-1]	0.00001
Effective porosity		[-]	0.2
Volumetric heat capacity of the fluid		[10^6 J·m^-3K^-1]	4.2
Volumetric heat capacity of the solid		[10^6 J·m^-3K^-1]	1.3
Heat conductivity of the fluid		[J·m^-1·s^-1K^-1]	0.65
Heat conductivity of the solid		[J·m^-1·s^-1K^-1]	3
Longitudinal dispersivity		[m]	5
Transverse dispersivity		[m]	0.5
Unit 2
Horizontal hydraulic conductivity		[m·s^-1]	0.00027
Vertical hydraulic conductivity		[m·s^-1]	0.000054
Effective porosity		[-]	0.2
Volumetric heat capacity of the fluid		[10^6 J·m^-3K^-1]	4.2
Volumetric heat capacity of the solid		[10^6 J·m^-3K^-1]	2.52
Heat conductivity of the fluid		[J·m^-1·s^-1K^-1]	0.65
Heat conductivity of the solid		[J·m^-1·s^-1K^-1]	3
Longitudinal dispersivity		[m]	5
Transverse dispersivity		[m]	0.5