ERV + Evap Cooling Modeling in eQuest

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Dear All,

I am using eQuest to model an Hotel building in a very hot, dry climate
zone which is has a great opportunity for energy saving when using
evaporative cooling in summer. I have modeled direct evaporative cooling
for 100% outdoor air handling unit along with sensible recovery wheel to
recover the exhaust air stream energy into the outdoor air.

When I run the model simulation and got into the "ERV Energy Recovery
Summary" and "SUPL Evap/Desicant Cooling" reports, I could not interpretate
the outputs to understand if the system is working appropriately or not.

I wonder if anyone can help me and provide me with some guidance or
example on ERV and Evap Cooling systems input and control setup as well as
the system output reports interpretation and what I need to do to get my
model run correctly reflecting the real system operation and predicted
saving.

- My model *.inp file is attached for your reference.

Regards,

Wahid H. Mohamed, LEED AP BD+C

Wahid Hamed's picture
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Wahid,

It would be easier for others to look at your model if you also included the .pd2 file.
Based on your input file, you are modeling two ERVs and you are trying to use the "dummy space" method. I do not use this method (yet) but others may have suggestions for you.
You are not going to get realistic results if I am interpreting your input file correctly:

- Your two dummy spaces/zones have no occupants, equipment or lighting loads, or envelope loads (only OA)

- You have specified zonal exhaust equal to the OA, which will simulate as no return air to the ERV

Regards,
Bill

William Bishop, PE, BEMP, BEAP, LEED AP

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Thanks Bill for your input.

I attached here *.pd2 file along with *.inp file agin.

I am using dummy space/zone method without any internal load, only the OA
and exhaust flow rates through ERV have been modeled within the dummy zone
and ERU system.

Regards,

Wahid

Wahid H. Mohamed, LEED AP BD+C

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Wahid,

Very interesting design!

I take back what I said about no loads in the dummy zones. That makes sense if the ERVs only handle ventilation loads.
Again, specifying zonal exhaust as you have should result in no energy recovered.
One more quick observation - you have extra roof surfaces in most of your spaces.
I suggest attaching the Riyadh weather file.

Is this going to be another one of those fryscrapers that melts/burns the objects and people below?

Regards,
Bill

Bill Bishop's picture
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Sir:
?
Could you provide your .PD2 file to all of us, so we can learn/help along with you?
?
Thank you.
?
John R. Aulbach, PE

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Dear Wahid,
What is the set point temperature/design temperature
you considered for the thermal zone served by your evaporative cooling
system

Also where is this SUPL Evap/Desicant Cooling" reports available in sim file

Whether i can see hourly air temp maintained in room by evaporative cooling.

Regards
Sambhav

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