# [Bldg-sim] 90.1 2010 - ERV - Fan Power Limitation Pressure Drop Adjustment

Julien.Dutel at mern.gouv.qc.ca Julien.Dutel at mern.gouv.qc.ca
Wed Aug 26 08:03:37 PDT 2015

```Here is a quick schematic of my project

[cid:image002.jpg at 01D0DFEE.DBFBB0E0]

During design condition (heating and cooling) economiser is off, wheel is on, and OA is at minimum (20% of the supply air). 10,000 cfm • 20% goes on each stream of the erv.

So based on your last answer the adjustment would be:

·         Adjustement for supply air = 10,000 • 20% • ( (2.2 • 0.6 ) - 0.5 ) = 1 640 hp

·         Adjustement for return air = 10,000 • 20% • ( (2.2 • 0.6 ) - 0.5 ) = 1 640 hp

Adjustments for the ERV would be : 1640 +1640 = 3280 hp

Am I correct ?

Thanks
Julien

Julien Dutel, ing., CEM, CMVP.
Téléphone : 418 627-6379, poste 8060

De : Jones, Christopher [mailto:Christopher.r.Jones at wspgroup.com]
Envoyé : 26 août 2015 09:48
À : Dutel, Julien (BEIE); bldg-sim at lists.onebuilding.org
Objet : RE: [Bldg-sim] 90.1 2010 - ERV - Fan Power Limitation Pressure Drop Adjustment

Hello Julien,
The entire formula is applied to each air stream, on the system, with an energy recovery device other than Runaround Coil.

When calculating A for each device, the flow CFMD, is the flow through the device, not the total system flow.  For example, the flow through an enthalpy wheel might be the only the outdoor air portion of the total system flow.

It’s a good question though.  I can see how the wording might trip you up.

[cid:image001.png at 01D0DFE7.76898DB0]
Christopher Jones, P.Eng.
Senior Engineer

WSP Canada Inc.
2300 Yonge Street, Suite 2300
Toronto, ON M4P 1E4
T +1 416-644-4226
F +1 416-487-9766
C +1 416-697-0065

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

From: Bldg-sim [mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Julien.Dutel at mern.gouv.qc.ca<mailto:Julien.Dutel at mern.gouv.qc.ca>
Sent: Wednesday, August 26, 2015 9:32 AM
To: bldg-sim at lists.onebuilding.org<mailto:bldg-sim at lists.onebuilding.org>
Subject: [Bldg-sim] 90.1 2010 - ERV - Fan Power Limitation Pressure Drop Adjustment

Hello,

With 90.1 2010, I wonder how to apply the fan power limitation pressure drop adjustment formula for an ERV:

(2.2 •  Energy Recovery Effectiveness) - 0.5 in w.c. for each airstream

I don’t find example in the 90.1 user’s manual about ERV, does the “for each stream” statement apply to the “0.5 in w.c.” or to the all formula ?

With a 10,000 cfm ventilation fan and a sensible wheel with a 60% efficiency, what would be the pressure drop adjustment for the ERV?

•         10,000 • ( (2.2 • 0.6 ) - 0.5 • 2) = 3,200 hp

Or

•         10,000 • 2 • ( (2.2 • 0.6 ) - 0.5)=16,400 hp

It’s definitively not the same !
Thanks

Julien

Julien Dutel, ing., CEM, CMVP.
Direction des secteurs résidentiel, institutionnel et des affaires
Bureau de l'efficacité et de l'innovation énergétiques
Ministère des Ressources naturelles
5700, 4e Avenue Ouest, B-406
Québec (Québec)  G1H 6R1
Téléphone : 418 627-6379, poste 8060
Téléphone sans frais : 1 877 727-6655
Télécopieur : 418 643-5828
http://www.efficaciteenergetique.mrn.gouv.qc.ca<http://www.efficaciteenergetique.mrn.gouv.qc.ca/>
AVIS DE CONFIDENTIALITÉ
Ce message est confidentiel. Il est à l'usage exclusif du destinataire ci-dessus. Si vous n'êtes pas le destinataire visé ou une personne autorisée à lui remettre cette communication, vous êtes par la présente avisé qu'il est expressément interdit de le diffuser, de le distribuer, de le reproduire, d'en dévoiler la teneur ou de prendre quelque mesure fondée sur l'information qui y est contenue. S’il vous a été envoyé par erreur, veuillez en informer immédiatement l'expéditeur par téléphone au 418 627-6379 et détruire ce message ainsi que toute copie de celui-ci.
P     Devez-vous vraiment imprimer ce courriel? Si oui, pensez l’imprimer recto-verso!

________________________________

You are receiving this communication because you are listed as a current WSP contact. Should you have any questions regarding WSP’s electronic communications policy, please consult our Anti-Spam Commitment www.wspgroup.com/casl. For any concern or if you believe you should not be receiving this message, please forward this message to us at caslcompliance at wspgroup.com<mailto:caslcompliance at wspgroup.com> so that we can promptly address your request. This message is intended only for the use of the individual or entity to which it is addressed, and may contain information which is privileged, confidential, proprietary or exempt from disclosure under applicable law. If you are not the intended recipient or the person responsible for delivering the message to the intended recipient, you are strictly prohibited from disclosing, distributing, copying or in any way using this message. If you have received this communication in error, please notify the sender, and destroy and delete any copies you may have received.

WSP provides professional land surveying services through the following entities: WSP Surveys (AB) Limited Partnership and WSP Surveys (BC) Limited Partnership
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/bldg-sim-onebuilding.org/attachments/20150826/04bfedbe/attachment.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image001.png
Type: image/png
Size: 6574 bytes
Desc: image001.png
URL: <http://lists.onebuilding.org/pipermail/bldg-sim-onebuilding.org/attachments/20150826/04bfedbe/attachment.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image002.jpg
Type: image/jpeg
Size: 7941 bytes
Desc: image002.jpg
URL: <http://lists.onebuilding.org/pipermail/bldg-sim-onebuilding.org/attachments/20150826/04bfedbe/attachment.jpg>
```

More information about the Bldg-sim mailing list