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AHU Humidity Control

Hi users,

I am having some trouble knowing what I should be doing to model this AHU in a building that has humidity control. From my understanding, there is a limit on the supply air humidity ratio (SAH) and a setpoint on the return air humidity ratio(RAH) at the AHU level and not at the zone level. I understand that I can put in the SAH in my energy model with one of the setpoint managers, HumidityMaximum I believe. Then comes my confusion, for humidification and de-humidification in energy plus there has to be a ZoneControl:Humidistat which would require a humidifying and de-humidifying schedule applied to each of the zones. What values should I be using for those two schedules is where I am stuck.

If anyone has an input that would be great. I have done some digging and came across link text and link text which have helped me understand what is required to control humidity.

Thanks in advance for the input.

AHU Humidity Control

Hi users,

I am having some trouble knowing what I should be doing to model this AHU in a building that has humidity control. From my understanding, there is a limit on the supply air humidity ratio (SAH) and a setpoint on the return air humidity ratio(RAH) at the AHU level and not at the zone level. I understand that I can put in the SAH in my energy model with one of the setpoint managers, HumidityMaximum I believe. Then comes my confusion, for humidification and de-humidification in energy plus there has to be a ZoneControl:Humidistat which would require a humidifying and de-humidifying schedule applied to each of the zones. What values should I be using for those two schedules is where I am stuck.

If anyone has an input that would be great. I have done some digging and came across link text and link text which have helped me understand what is required to control humidity.

Thanks in advance for the input.

AHU Humidity Control

I am having some trouble knowing what I should be doing to model this AHU in a building that has humidity control. From my understanding, there is a limit on the supply air humidity ratio (SAH) and a setpoint on the return air humidity ratio(RAH) at the AHU level and not at the zone level. I understand that I can put in the SAH in my energy model with one of the setpoint managers, HumidityMaximum I believe. Then comes my confusion, for humidification and de-humidification in energy plus there has to be a ZoneControl:Humidistat which would require a humidifying and de-humidifying schedule applied to each of the zones. What values should I be using for those two schedules is where I am stuck.

If anyone has an input that would be great. I have done some digging and came across link text and link text which have helped me understand what is required to control humidity.