The Kansai Electric Power Co., Inc.

Mitsubishi Heavy Industries Thermal Systems, Ltd.

Osaka City University

Newjec Inc.

Morikawa Sakusen Industries Co., Ltd.

Shinsuke Sakae

Kazuhiro Nakamura

Masaki Nakao

Masanobu Sakai

Takeshi Fuchimoto

Yasuhisa Nakaso

Rinnichi Sai

Masatoshi Nishioka

Toshihide Morikawa

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.

Growing community of inventors

Osaka, Japan

Shinsuke Sakae