| 摘要 |
PROBLEM TO BE SOLVED: To automatically perform the energy-saving operation of a clean room by operating a refrigerator at the temperature of the cooling water necessary for the operation of external and internal air conditioners to calculate the temperature of the cooling water based on the measurement result of the outside air condition. SOLUTION: When the enthalpy (i) of the outside air is compared with the enthalpy im in a clean room and im<i, the temperature of the cooling water necessary for the differential enthalpyΔi required for the dehumidifying operation of an external air conditioner is calculated. When im>=i, the temperature To of the outside air is compared with the supply air set temperature T1 from the external air conditioner, and T1<To, the temperature of the cooling water necessary for the heat exchange differential temperatureΔTo required by the external air conditioner is calculated to be A, and when T1>To, the supply air operation is performed by the external air conditioner. The temperature Ti in the clean room is compared (step 3) with the supply air set temperature T2 from the internal air conditioner, and the temperature A of the cooling water is compared (step 4) with the temperature B of the cooling water of the internal air conditioner required for the differential temperatureΔTi, and the lower temperature is the temperature condition of the coldest cooling water in the clean room.
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