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Hi!

I'm trying to simulate an AHU, which modulates it's fan speed due to the sensible heat gains from the zones. The AHU should use it's own heating and cooling coil without any reheat in the zone (there is no other HVAC equipment there, like FanCoils or radiators)

As far as i know, for this purpose i should use VAV istead of CAV, but when check the fan's Mass Flow Rate it's linear - not modulating at all...

Am I understood wrongly these systems?

Thank you for clarifying this issue!

thanx, Peter

Hi!

I'm trying to simulate an AHU, which modulates it's its fan speed due to the sensible heat gains from the zones. The AHU should use it's its own heating and cooling coil without any reheat in the zone (there is no other HVAC equipment there, like FanCoils or radiators)

As far as i know, for this purpose i should use VAV istead instead of CAV, but when check the fan's Mass Flow Rate it's linear - not modulating at all...

Am I understood understanding wrongly these systems?

I'm trying to simulate an AHU, which modulates its fan speed due to the sensible heat gains from the zones. The AHU should use its own heating and cooling coil without any reheat in the zone (there is no other HVAC equipment there, like FanCoils or radiators)

As far as i know, for this purpose i should use VAV instead of CAV, but when check the fan's Mass Flow Rate it's linear - not modulating at all...

Am I understanding wrongly these systems?