| 摘要 |
[Object] To provide a control apparatus for a cooling system which does not require an expensive dry and wet-bulb temperature measurement sensor, and can implement control equivalent to that using a dry and wet-bulb temperature measurement sensor in use of only a cooling water temperature measurement sensor. [Means of Solution] A cooling system is provided, which has a cooling tower 1, a refrigeration device 2, a cooling fan 11 provided in the cooling tower 1, a cooling water pump 21 which circulates cooling water between the cooling tower 1 and the refrigeration device 2, an inlet temperature sensor 7 which detects the cooling water temperature at an inlet of the cooling tower 1, and an inverter apparatus 12 which variably controls the speed of the cooling tower 11, wherein the output frequency of the inverter apparatus 12 is gradually reduced after the output frequency reaches an upper limit frequency, the output frequency at which the inlet temperature detection value T 2 of the cooling water does not rise despite the reduction in the output frequency is stored, and the inverter apparatus 12 is operated thereafter on the basis of the stored output frequency. |
