| 摘要 |
PROBLEM TO BE SOLVED: To provide a refrigeration system in which reliability is enhanced by controlling the refrigeration cycle in quick response to variation of thermal loads in a system to be cooled thereby realizing high accuracy control. SOLUTION: The refrigeration system comprises refrigeration cycle circuits 8A, 8B, a circuit 10 for circulating cooling water through a heat exchanger 6 and an external unit 1 in the refrigeration cycle circuits, and a circuit 15 for controlling the refrigeration cycle circuits by determining a thermal load Q according to a formula Q=(T2-T1)S.d.g, where, d: specific heat (water: about 1), g: specific weight (water: about 1), based on detection signals from a first temperature sensor 12 for detecting the cooling water temperature T1 on the outlet side of a heat exchanger, a second temperature sensor 13 for detecting the cooling water temperature T2 on the inlet side of the heat exchanger, and a sensor 16 for detecting the water pressure being expressed in terms of flow rate S.
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