TURBO REFRIGERATOR MAXIMUM LOAD FACTOR CALCULATION DEVICE, TURBO REFRIGERATOR MAXIMUM LOAD FACTOR CALCULATION METHOD, HEATING SOURCE SYSTEM, AND METHOD OF CONTROLLING NUMBER OF TURBO REFRIGERATORS OF HEATING SOURCE

摘要

PROBLEM TO BE SOLVED: To calculate a maximum load factor at a current operation point using ordinary information used by a turbo refrigerator for normal control.SOLUTION: A refrigerator control device 10a includes: a data acquisition unit 41; a storage unit 42; and an arithmetic unit 43. The data acquisition unit 41 acquires a cold-water outlet set temperature, a coolant outlet temperature, an evaporation pressure, and a condensation pressure of a turbo refrigerator as input data. The storage unit 42 stores therein a maximum load factor operational expression that includes the cold-water-outlet set temperature, a coolant inlet temperature, the evaporation pressure, and the condensation pressure of the turbo refrigerator as variables and that includes rated power consumption and rated capability as fixed parameters. The arithmetic unit 43 calculates a maximum load factor that can be output from the turbo refrigerator at a current operation point by applying the input data acquired by the data acquisition unit 41 to the maximum load factor operational expression stored in the storage unit 42.