Question-and-Answer Resource for the Building Energy Modeling Community
Get started with the Help page
Ask Your Question

Revision history [back]

Constant Volume Fan not Constant

I have hardsized everything on the airloop at 500cfm. Constant volume fan. However, when viewing the volumetric flow rate output variables, it appears that the flow rate is not constant. Why?

image descriptionimage description

Constant Volume Fan not Constant

I have hardsized everything on the airloop at 500cfm. Constant volume fan. However, when viewing the volumetric flow rate output variables, it appears that the flow rate is not constant. Why?

image descriptionimage description

And, why does this binary control point (AvailabilityManager:HighTemperatureTurnOn) show other than binary values?:image description

Constant Volume Fan not Constant

I have hardsized everything on the airloop at 500cfm. Constant volume fan. However, when viewing the volumetric flow rate output variables, it appears that the flow rate is not constant. Why?

image descriptionimage description

And, why does this binary control point (AvailabilityManager:HighTemperatureTurnOn) show other than binary values?:image description

Here is the idf file: https://drive.google.com/file/d/1am9kCId7YrY5QDicbhOD0z7obwSiUz4H/view?usp=sharing