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Minimum air change rate with VRF and DOAS

asked 2017-08-29 13:21:19 -0500

ptruong gravatar image

updated 2017-08-29 16:10:53 -0500

Hello, I have a project with minimum outdoor airflow and minimum supply airflow requirements. I think I have the outdoor airflow inputs squared away, but am stuck on how to capture the minimum supply air requirements. This post suggests defining the minimum supply airflow requirement at the terminal box; however, with VRFs + DOAS, I am using the AirTerminal:SingleDuct:Mixer, which does not have an input for minimum flow rate. At the VRF terminal, I only see the inputs listed below, none which are minimum flow rates. Any ideas on how I can model this or is there something I have overlooked? Thanks!

Cooling Supply Air Flow Rate {m3/s} No Cooling Supply Air Flow Rate {m3/s} Heating Supply Air Flow Rate {m3/s} No Heating Supply Air Flow Rate {m3/s}

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anyone have any suggestions on this issue?

ptruong gravatar imageptruong ( 2017-09-05 07:41:26 -0500 )edit

thanks, i will give those a try. do you know if these are minimums?

ptruong gravatar imageptruong ( 2017-09-05 08:01:03 -0500 )edit

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answered 2017-09-05 07:52:09 -0500

The no flow inputs are used when no cooling or heating is needed. Try using these inputs for minimum air flow requirements.

No Cooling Supply Air Flow Rate {m3/s} No Heating Supply Air Flow Rate {m3/s}

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Asked: 2017-08-29 13:21:19 -0500

Seen: 123 times

Last updated: Sep 05 '17