Mitsubishi Heavy Industries Thermal Systems, Ltd.

The Kansai Electric Power Co., Inc.

Osaka City University

Newjec Inc.

Morikawa Sakusen Industries Co., Ltd.

Mitsubishi Heavy Industries Limited

Takeshi Fuchimoto

Minoru Matsuo

Toru Yamaguchi

Kazuhiro Nakamura

Masaki Nakao

Masanobu Sakai

Rinnichi Sai

Yasuhisa Nakaso

Shinsuke Sakae

Satoshi Nikaido

Toshiaki Ouchi

Masatoshi Nishioka

Toshihide Morikawa

Kei Akatsuka

Takachika Mori

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.

A heat source system that optimizes a load on compressors in multiple heat source machines with respective independent refrigeration cycles that are situated in series. This is accomplished by using an information acquisition unit that acquires measurement values of operation frequencies of compressors from the respective heat source machines, a load distribution change unit that changes a load distribution currently assigned to each of the heat source machines, and a temperature setting unit that sets the hot/chilled water outlet temperatures of respective heat source machines.

Heat source system and control method thereof

Provided is a heat pump system that can appropriately manage the number of heat pumps in operation even when any of the heat pumps is defrosting, and that can always operate at a capacity that corresponds to a load. Also provided is an operation method for the heat pump system. A heat pump system () wherein a plurality of heat pumps (A-C (A-D)) are connected to a system load and wherein a system management unit () successively calculates the capacity that can be output by the heat pumps (A-C (A-D)) in operation, compares the calculated capacity value, as a threshold value, to the thermal load of the system load, and manages the number of heat pumps (A-C (A-D)) in operation.

Heat pump system and operation method therefor

Growing community of inventors

Tokyo, Japan

Takeshi Fuchimoto