| 摘要 |
An air conditioning control system is disclosed for controlling a refrigeration unit located in a building which has both interior zones and exterior zones, the refrigeration unit being capable of supplying both chilled water for cooling and hot water for heating. The hot water temperature is controlled by first controlling the amount of heat rejected by a cooling tower, then by controlling the position of an outdoor air damper as a source of free cooling, then by overriding both the chilled water and hot water temperature controllers and finally by controlling the amount of fuel heat supplied to the hot water. The chilled water temperature controller is overridden to lower the chilled water temperature thus increasing the rejected heat from the refrigeration unit. The hot water temperature controller is overridden to increase the rejected heat supplied by the refrigeration unit.
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