US 11,859,871 B2
Geothermal heat utilization system and operation method for geothermal heat utilization system
Rinnichi Sai, Tokyo (JP); Masanobu Sakai, Tokyo (JP); Toru Yamaguchi, Tokyo (JP); Masaki Nakao, Osaka (JP); and Yasuhisa Nakaso, Osaka (JP)
Assigned to MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD., Tokyo (JP); and UNIVERSITY PUBLIC CORPORATION OSAKA, Osaka (JP)
Appl. No. 17/276,371
Filed by MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD., Tokyo (JP); and UNIVERSITY PUBLIC CORPORATION OSAKA, Osaka (JP)
PCT Filed Sep. 19, 2019, PCT No. PCT/JP2019/036722
§ 371(c)(1), (2) Date Mar. 15, 2021,
PCT Pub. No. WO2020/059788, PCT Pub. Date Mar. 26, 2020.
Claims priority of application No. 2018-175985 (JP), filed on Sep. 20, 2018.
Prior Publication US 2022/0034552 A1, Feb. 3, 2022
Int. Cl. F24T 10/20 (2018.01); F24T 10/13 (2018.01)
CPC F24T 10/20 (2018.05) [F24T 10/13 (2018.05)] 11 Claims
OG exemplary drawing
 
1. A geothermal heat utilization system, comprising:
a first well that includes a first upper opening that opens in an upper aquifer and a first lower opening that opens in a lower aquifer;
a second well that includes a second upper opening that opens in the upper aquifer and a second lower opening that opens in the lower aquifer;
a first pipe;
a second pipe;
a first heat exchanger connected to the first pipe; and
a second heat exchanger connected to the second pipe,
wherein the geothermal heat utilization system is capable of supplying underground water of the upper aquifer from the first upper opening to the second upper opening via the first pipe,
wherein the geothermal heat utilization system is capable of supplying underground water of the lower aquifer from the second lower opening to the first lower opening via the second pipe, and
wherein the geothermal heat utilization system is configured to pump hot water as the underground water to be supplied from one of the upper aquifer and the lower aquifer, and at the same time, pump cold water as the underground water to be supplied from the other of the upper aquifer and the lower aquifer.