VRF Modelling in Equest

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Dear All,

For a mixed-use building, we would like to see the savings through installing a variable refrigerant flow system in eQuest. Anybody has any experience with this? Does eQuest actually support VRF systems?

Best regards.

Omer Moltay, LEED AP

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There was a presentation at BSUG recently on recommended workarounds for
modeling VRF in eQUEST. At present you cannot model this system type
directly in eQUEST.

Presentation notes are here (you may need to be a member of the BSUG Yahoo
Group to access):

http://tech.groups.yahoo.com/group/BSUG/

The presentation notes are in the files section.

Note - you may want to look at equest-users list for eQUEST
questions/answers. It is also hosted by onebuilding.org

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Dear All,

I thank you for all the valuable answers. One last question is, do you think
USGBC would accept simulation results by eQuest carried out the way Mr.
Oylear has suggested or the way Mr. Schrader mentions in his posts? Or would
they only accept results if VRF modelling is done by EnergyPro?

Best regards.

Omer Moltay, LEED AP

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According to the presenters of that method they stated that USGBC had
accepted the spreadsheet method on a previous job. There is nothing
really absurd about the calculation. It is per Appendix G's methodology
for Exceptional Calculation Methods when a program cannot model a
particular energy saving strategy.

Robby Oylear, LEED??AP

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Hi Omer,
I do not have a reference of the method suggested by Mr.Oylear. However, I do support Robby's opinion. USGBC does not advance the use of any specific simulation software. Savings from any strategy beyond the capacity of the simulation tool should be determined as per Appendix G's methodology for Exceptional Calculation Methods. Support your claims with spreadsheet calculations and /or robust research and clearly explain your methodology. This is acceptable to USGBC.
Hope this helps.

Thanks,
Reshma Kulkarni, LEED AP

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Trane's Trace can model VRF.

Shaun Martin LEED AP

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EnergyPro models both Daikin and Mitsubishi equipment.

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