Recoverable Resource Prediction of Shallow Geothermal Energy in Small Towns Using the Finite Volume Method: Taking the Central Urban Area of Danyang City, Jiangsu Province, as an Example

Table 1

Borehole experiment parameters.

Test hole number	Pipe burying mode	Test condition	Heating power (kW)	Backfill materials
DW2	Double-U/SSingle-U	Constant heat-flow method	4.5/7.5	Medium-coarsesand
DW3	Single-U	Constant heat-flow method	4.5/7.5	Medium-coarsesand
DW1	Single-U	Constant heat-flow method	4.5/7.5	Medium-coarsesand
DW6	Single-U	Constant heat-flow method	4.5/7.5	Medium-coarsesand
DW4	Single-U	Constant heat-flow method	4.5/7.5	Medium-coarsesand