[Equest-users] ERV Impact

[Howe, Timothy]

Did you use capacity control and make-up air temperature control?  If not you will be over heating and over cooling in some conditions as the air will always be going through the heat recovery device.

Timothy Howe, MS, LEED® AP BD+C
Mechanical Engineer
Stantec
61 Commercial Street
Rochester NY 14614
Ph:   (585) 413-5347
Fx:   (585) 272-1814
Cell: (585) 281-3223
stantec.com<http://www.stantec.com/>

The content of this email is the confidential property of Stantec and should not be copied, modified, retransmitted, or used for any purpose except with Stantec's written authorization. If you are not the intended recipient, please delete all copies and notify us immediately.

ü Please consider the environment before printing this email.

From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Andrew Clagett
Sent: Friday, November 30, 2012 3:00 PM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] ERV Impact

Hello all. After finalizing my building and obtaining what appeared to be reasonable output, I removed the ERV devices (modeled at 85% efficient cross-flow air to air heat exchangers) from the model to ascertain the energy savings attributable to those devices.

And my total energy consumption went DOWN over 6%! Inexplicably, 'space cooling' and 'pumps & aux.' energy consumption has decreased by a  far larger amount than 'space heating' increased. I would have expected both of those values to increase along with the 'space heating' energy consumption (which did increase).

Anyone have any idea why that might be?

Andrew Clagett, PE, LEED AP
Mechanical
d |  206.436.0494     o | 206.448.3376    e | andrewc at hargis.biz<mailto:andrewc at hargis.biz>    v-card<http://www.hargis.biz/vcards/Andrew%20Clagett.vcf>

HARGIS

     mechanical * electrical * telecommunications * security


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20121130/384eba85/attachment-0002.htm>