Modeling Ashrae - System 8 in equest - Fan in the parallel box

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Dear equest users,
According G3.1.3.14 for system 8 the fan parallel box shall be modeled with
0.35 W/cfm fan power.
I was wondering where this paramater can be insered in equest.

In the following screenshot I have input the power of the supply fan.

[image: image.png]

Thank you very much.

Best regards

Konstantina Kalliakoudi
Mechanical Engineer ?.Sc.

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Joined: 2019-03-25
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You are correct to model VAV systems with parallel and series powered boxes as PIU system type.

This system type will enable several keywords at the zone level on the Airflow tab:
[cid:image003.png at 01D546B7.A30B1670]

Included in these is ZONE-FAN-RATIO and ZONE-FAN-KW/FLOW where you can enter your VAV box fan power.


Brian Fountain
d 416 572 8501 m 416 562 6831

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Joined: 2019-05-02
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For common reference, here are the same inputs when using doe2.3. We have a couple new inputs pertaining to terminal boxes and the fans that love them (ha-ha). These options might merit separate consideration inside/outside the confines of a 90.1 modeling effort:
[cid:image001.png at 01D547BA.174DC700]

[cid:image005.png at 01D515A3.47EDD880]
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[cid:image006.png at 01D515A3.47EDD880]

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Joined: 2019-03-25
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