Yokogawa Electric Corporation

Taiyo Nippon Sanso Corporation

Ricoh Company, Ltd.

Masaki Ishii

Akira Kinoshita

Takahiro Imai

Hirotsugu Gotou

Kenji Namie

Go Takami

Hirokazu Hirai

Shinsuke Ozaki

Makoto Endo

Nobuyuki Morioka

A turbo-Brayton refrigeration machine () includes a first circulation path (L) in which a first refrigerant circulates, a second circulation path (L) in which a second refrigerant which is a cooling target circulates, a subcooler () disposed over the first circulation path (L) and the second circulation path (L) and configured to have a single heat-exchanging unit, and an expansion turbine () positioned on a primary side of the subcooler () in the first circulation path (L), in which the pressure ratio of the expansion turbine () is the pressure ratio at which the outlet temperature of the expansion turbine () is higher than a freezing point of the second refrigerant.

Refrigeration machine

A patrol check system according to one aspect of the present invention includes at least one data collection device installed in a first position in an area in which facilities are installed, the data collection device being configured to collects measured values indicating a state of at least one facility installed in a first range around the first position, the facility belonging to a check target of the data collection device, the measured values being measured by a measurement device installed in the facility, and a patrol check device configured to acquire the measured values collected by the data collection device, and reflect the acquired measured values in a check result of a check record in which check items to be performed on the facility belonging to the check target of the data collection device are included.

Patrol check system, patrol check device, patrol check method, and storage medium

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Tokyo, Japan

Masaki Ishii