Mitsubishi Heavy Industries Thermal Systems, Ltd.

The Kansai Electric Power Co., Inc.

Osaka City University

University Public Corporation Osaka

Newjec Inc.

Morikawa Sakusen Industries Co., Ltd.

Rinnichi Sai

Masaki Nakao

Masanobu Sakai

Yasuhisa Nakaso

Toru Yamaguchi

Kazuhiro Nakamura

Takeshi Fuchimoto

Shinsuke Sakae

Masatoshi Nishioka

Toshihide Morikawa

A geothermal heat utilization system includes a first well having a first upper opening and a first lower opening, and a second well having a second upper opening and a second lower opening. The geothermal heat utilization system further includes a first pipe, a second pipe, a first heat exchanger, and a second heat exchanger. The geothermal heat utilization system is capable of supplying underground water of an upper aquifer from the first upper opening to the second upper opening via the first pipe, and the geothermal heat utilization system is capable of supplying underground water of a lower aquifer from the second lower opening to the first lower opening via the second pipe.

Geothermal heat utilization system and operation method for geothermal heat utilization system

The geothermal heat utilization system is capable of supplying underground water of an upper aquifer from the first upper opening to the second upper opening via the first pipe, and capable of supplying underground water of a lower aquifer from the second lower opening to the first lower opening via the second pipe. Further, the geothermal heat utilization system is configured to pump hot water and at the same time, pump cold water.

A geothermal heat utilization system () includes a pumping well (), a water injection well (), a pipe () having two ends which are immersed in water stored in the pumping well () and the water injection well () so as to connect the pumping well () and the water injection well () to each other, a pump () and a pump () which are respectively provided inside the pumping well () and the water injection well () and pump up stored water through the pipe (), a valve () and a valve () which are respectively provided on a pressurization side of the pump () inside the pumping well () and a pressurization side of the pump () inside the water injection well (), and a heat exchanger () which is configured to exchange heat with the pipe ().

Geothermal heat utilization system and geothermal heat utilization method

A geothermal heat utilization system includes a heat source well facility, a heat source device having a refrigeration cycle including a compressor, a condenser, an expanded portion, and an evaporator, a primary refrigerant circuit that is connected to a first unit which is one of the condenser and the evaporator of the heat source device, heat exchange being able to be performed between the first unit and the well-side pipe, a secondary refrigerant circuit that is connected to a second unit which is the other of the condenser and the evaporator of the heat source device, heat exchange being able to be performed between the second unit and a load, and a mode switching unit that switches between a cold heat storage operation mode in which the primary refrigerant circuit is connected to the evaporator and the secondary refrigerant circuit is connected to the condenser and a cold heat discharge operation mode in which the primary refrigerant circuit is connected to the condenser and the secondary refrigerant circuit is connected to the evaporator.

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Tokyo, Japan

Rinnichi Sai