Abstract: A cooling system 1 is constructed to have a refrigeration circuit 2 in which low-temperature showcases 7 as plural load facilities are connected to a rack system refrigerating machine 3 in parallel through refrigerant pipes 5a and 5b, a main controller 4 for generating and outputting control data of compressors 9 constructing the rack system refrigerating machine 3 on the basis of the cooling state of the low-temperature showcases 7, and a compressor controller 6 which is constructed to acquire control setting required for capacity control of the compressors 9 as main elements of the rack system refrigerating machine 3, receives control data from the main controller 4 and controls the compressors 9 on the basis of the control setting and the control data.

Abstract: In a controller for a refrigerating system including refrigerating machines and showcases, a showcase that is about to execute a defrost operation is detected on the basis of a defrost operation indicating information. When the controller receives a notification indicating start of the defrost operation from the showcase concerned or on the basis of a comparison result between a pre-stored defrost-operation start time and the present time, at least one of the refrigerating machines is instructed to reduce the output power thereof. When the showcase finishes the defrost operation, the at least one of the refrigerating machines is instructed to increase the output power thereof so that the output power of the refrigerating machine is set to stationary output power.

Abstract: According to a controller for a cooling system, when an optimum value of a low-pressure side pressure set value corresponding to an operation environmental condition to be generated is registered in a data base 15, the optimum value of the low-pressure side pressure set value is used. In a case where the optimum value of the low-pressure side pressure set value is not registered in the data base 15, when an optimum value of a low-pressure side pressure set value Ps corresponding to an operation environmental condition adjacent to the operation environmental condition to be generated is registered, the optimum value of the low-pressure side pressure set value Ps is used.

Abstract: A demand control system 1 according to the present invention includes a CPU 41 and a power database 45. The power database 45 stores actual data in a state where the actual data are classified according to environmental conditions, the actual data being based on a consumption integration value of power actually consumed by the power consuming device. The CPU 41 calculates a predicted integration value of power predicted to be consumed in the demand time period, by using contents stored in the power database 45 at a start or before the start of the current demand time period. Further, the CPU 41 lowers a power target value when the calculated predicted integration value falls below the power target value being a target value of the power to be consumed in the demand time period.

Abstract: Both of maintenance of cooling performance of low-temperature showcases and enhancement of energy saving performance of a refrigerating machine are enabled. A cooling system 1 is constructed to have a refrigeration circuit 2 in which low-temperature showcases 7 as plural load facilities are connected to a rack system refrigerating machine 3 in parallel through refrigerant pipes 5a and 5b, a main controller 4 for generating and outputting control data of compressors 9 constructing the rack system refrigerating machine 3 on the basis of the cooling state of the low-temperature showcases 7, and a compressor controller 6 which is constructed to acquire control setting required for capacity control of the compressors 9 as main elements of the rack system refrigerating machine 3, receives control data from the main controller 4 and controls the compressors 9 on the basis of the control setting and the control data.

Abstract: An air-conditioning refrigerating system that enables demand control based on operation control of an air-conditioning system and a refrigerating system is provided.

Abstract: A demand control system 1 according to the present invention includes a CPU 41 and a power database 45. The power database 45 stores actual data in a state where the actual data are classified according to environmental conditions, the actual data being based on a consumption integration value of power actually consumed by the power consuming device. The CPU 41 calculates a predicted integration value of power predicted to be consumed in the demand time period, by using contents stored in the power database 45 at a start or before the start of the current demand time period. Further, the CPU 41 lowers a power target value when the calculated predicted integration value falls below the power target value being a target value of the power to be consumed in the demand time period.

Abstract: According to a controller for a cooling system, when an optimum value of a low-pressure side pressure set value corresponding to an operation environmental condition to be generated is registered in a data base 15, the optimum value of the low-pressure side pressure set value is used. In a case where the optimum value of the low-pressure side pressure set value is not registered in the data base 15, when an optimum value of a low-pressure side pressure set value Ps corresponding to an operation environmental condition adjacent to the operation environmental condition to be generated is registered, the optimum value of the low-pressure side pressure set value Ps is used.

Abstract: In a controller for a refrigerating system including refrigerating machines and showcases, a showcase that is about to execute a defrost operation is detected on the basis of a defrost operation indicating information. When the controller receives a notification indicating start of the defrost operation from the showcase concerned or on the basis of a comparison result between a pre-stored defrost-operation start time and the present time, at least one of the refrigerating machines is instructed to reduce the output power thereof. When the showcase finishes the defrost operation, the at least one of the refrigerating machines is instructed to increase the output power thereof so that the output power of the refrigerating machine is set to stationary output power.

Abstract: A monitoring system is provided for remotely monitoring in-store equipment. A controller is provided in each store for monitoring and controlling in-store equipment. A monitoring computer is connected to the controller in each store through a communication line. The controller includes data transmission means for transmitting to the monitoring computer data related to each in-store equipment and predetermined measurement data, and display means for displaying power saving advice information fed from the monitoring computer, and the monitoring computer comprising power saving advice information production means for producing power saving advice information for efficiently operating each in-store equipment on the basis of the data received from the controller, and power saving advice information transmission means for transmitting to the controller the produced power saving advice information.

Abstract: An in-store equipment remote-monitoring system comprises a controller provided in each store and monitoring and controlling in-store equipment and a monitoring computer connected to the controller in the store through a public line, the controller comprising data transmission means for transmitting to the monitoring computer data related to each in-store equipment and predetermined measurement data, and display means for displaying power saving advice information fed from the monitoring computer, and the monitoring computer comprising power saving advice information production means for producing power saving advice information for efficiently operating each in-store equipment on the basis of the data received from the controller, and power saving advice information transmission means for transmitting to the controller the produced power saving advice information.

Abstract: An in-store equipment remote-monitoring system comprises a controller provided in each store and monitoring and controlling in-store equipment and a monitoring computer connected to the controller in the store through a public line, the controller comprising data transmission means for transmitting to the monitoring computer data related to each in-store equipment and predetermined measurement data, and display means for displaying power saving advice information fed from the monitoring computer, and the monitoring computer comprising power saving advice information production means for producing power saving advice information for efficiently operating each in-store equipment on the basis of the data received from the controller, and power saving advice information transmission means for transmitting to the controller the produced power saving advice information.