Chemical fiber air conditioning control system
Sample the temperature and humidity of the fresh and return air and calculate the enthalpy values of the fresh and return air.
The comparison of enthalpy values of fresh and return air determines the working condition and the action trend of the air valve.
Overall air conditioning set points: supply air temperature, supply air humidity, supply air pressure;
The dew point temperature is calculated based on the set supply air temperature and supply air humidity controller.
The temperature detected by the dew point temperature sensor is compared with the dew point temperature calculated by the controller to control the opening degree of the output air valve.
The temperature detected by the dew point temperature sensor is compared with the dew point temperature calculated by the controller to control the opening degree of the output surface cooling/hot water heater.
The opening degree of secondary heating is controlled by comparing the temperature detected by the supply air temperature transmitter with the set supply air temperature.
The opening degree of the supply air frequency conversion is determined by comparing the pressure detected by the supply air pressure transmitter with the set supply air pressure.
When the fan is not turned on, the heating and cold water should be forcibly turned off. When the water pool temperature protection system intervenes, it forcibly outputs an alarm signal to prompt the shutdown of the steam injection system.
The cold and heat sources are restricted. Only when the air valve is opened to the limit position (i.e., when the enthalpy value control of the air valve fails to meet the requirements) can surface cold, hot water or steam be introduced.
In the temperature stability priority system, when the deviation between the measured dew point temperature of the controller and the calculated dew point set value is large, a small amount of cold and heat sources should be involved.
The enthalpy increase and enthalpy decrease conditions seamlessly switch the system with temperature priority and delay.
