Table 4 Thermo-physical properties of various media

Volumetric heat capacity of thermal insulation pipe (VHC_TIP), J/(m³ K)

3.63 × 10⁶

Volumetric heat capacity of casing (VHC_cas), J/(m³ K)

3.63 × 10⁶

Volumetric heat capacity of cement sheath (VHC_cs), J/(m³ K)

1.85 × 10⁵

Volumetric heat capacity of caprock (VHC_cap), J/(m³ K)

1.96 × 10⁶

Volumetric heat capacity of transition formation (VHC_tf), J/(m³ K)

2.10 × 10⁶

Volumetric heat capacity of insulation formation (VHC_if), J/(m³ K)

2.3 × 10⁶

Volumetric heat capacity of hot dry rock (VHC_HDR), J/(m³ K)

2.60 × 10⁶

Thermal conductivity of thermal insulation pipe (λ_TIP), W/(m K)

0.03

Thermal conductivity of casing (λ_cas), W/(m K)

45

Thermal conductivity of cement sheath (λ_cs), W/(m K)

22

Thermal conductivity of caprock (λ_cap), W/(m K)

2.1

Thermal conductivity of transition formation (λ_tran),W/(m K)

2.8

Thermal conductivity of insulation formation (λ_if),W/(m K)

0.3

Thermal conductivity of hot dry rock reservoir (λ_HDR),W/(m K)

2.6