[Equest-users] Run-Around Energy Recovery

[Nicholas Caton]

I believe zonal exhaust can be captured in the relief airstream for ERV, but getting the relief airstream correct means getting a solid enough handle on everything else:  return/supply/infiltration/exfiltration.

Following is the last diagram on this matter that I drew up for myself.

I'm open to comment/corrections, but this answers at least some of your questions, I believe:
[(AV3 ON)  *Wi? 'Vr*ez  -3d1*5m0  JM0d  J9h?y3]


[cid:image002.png at 01D36A02.0DFC6540]
Nick Caton, P.E., BEMP
  Senior Energy Engineer
  Regional Energy Engineering Manager
  Energy and Sustainability Services
  Schneider Electric

D  913.564.6361
M  785.410.3317
F  913.564.6380
E  nicholas.caton at schneider-electric.com<mailto:nicholas.caton at schneider-electric.com>

15200 Santa Fe Trail Drive
Suite 204
Lenexa, KS 66219
United States

[cid:image003.png at 01D36A02.0DFC6540]



From: Equest-users [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Daric Adair via Equest-users
Sent: Thursday, November 30, 2017 4:52 PM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] Run-Around Energy Recovery

All;
Have a project using a run-around loop to recovery sensible energy from laboratory exhaust fans. I have reviewed the archives and my own memory, but this is leaving me scratching my head. I also recall a recent (maybe?) discussion on Zone vs System exhaust that may directly feed into this  - but cannot find it.

If the lab hood exhaust is put in at the zone level, eQuest won't do energy recovery on this air-stream, as zone exhaust goes 'outside', yes?

My current thought is to configure the VAV AHU to have either 'Sensible HX' or 'Heat Pipe' and also have self-contained ERV fans. I'd input the Exhaust fans in as scheduled and then put a low/0 power fan for supply since there really isn't such. The OA is moved by the primary supply fan. I'd also calculate a 'HX power' or the run-around pump. I'd have 0 zone exhaust; exhaust only at the System level.

Can anyone comment on this approach or advise on how to best approach?


Thanks,
DARIC R ADAIR PE, CEM, BEMP
Mechanical Engineer, Energy Analyst

Henderson Engineers
8345 Lenexa Drive, Suite 300  |  Lenexa, KS 66214
Tel (913) 742-5530
daric.adair at hendersonengineers.com<mailto:daric.adair at hendersonengineers.com>

hendersonengineers.com<http://www.hendersonengineers.com/>

Licensed in KS

Sending me large files? Please use Henderson File Share<https://apps.hendersonengineers.com/FileShare/Upload?to=daric.adair@hendersonengineers.com> | TX ID #F-001236


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