Patent ID: 11906205
Assignee: QUANTITATIVE HEAT OY
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 6:
7. The method according to claim 6, wherein the method comprises:
operating the geothermal heat exchanger in an extraction mode in which the primary working fluid releases thermal energy to the secondary working fluid in the heat exchange between the primary working fluid circulating in the geothermal heat exchanger and the secondary working fluid; and
circulating the primary working fluid in the extraction mode in a downwards direction in the drain pipe and in a direction upwards in the rise pipe for transporting thermal energy from the ground hole and for releasing thermal energy from the primary working fluid to the secondary working fluid in the heat exchange between the primary working fluid circulating in the geothermal heat exchanger and a secondary working fluid.