[Bldg-sim] Transformers in Energy Model

[Sami, Vikram]

You can model transformer sizes and losses in the detailed edit mode when you open up you electric meter.

I have to confess I have not modeled a transformer in a model yet (the default is not to model a transformer and the loss associated). You can specify a loss part load curve too:

TRANS-LOSS-FPLR
Takes the U-name of a curve that gives the multiplier on TRANSFORMER-LOSS as a function of the part load ratio (current hour load on the meter divided by TRANSFORMER-SIZE). The transformer loss is calculated hourly as
          (TRANSFORMER-SIZE) x (TRANSFORMER-LOSS) x (TRANS-LOSS-FPLR value)
The load is the sum of that due to all directly connected equipment and, for TYPE = UTILITY and BUILDING, other ELEC-METERs. The default curve is linear from 0.1 at zero load to 1.0 at full load.

Like I said I haven't done it yet - good luck. Let me know how it turns out

Vikram Sami, LEED AP
Sustainable Design Analyst
1382 Peachtree St. NE, Atlanta, GA 30309
t: 404-443-7462    f: 404.892.5823       e: vikram.sami at perkinswill.com   www.perkinswill.com<http://www.perkinswill.com/>
Perkins+Will.  Ideas + buildings that honor the broader goals of society


From: bldg-sim-bounces at lists.onebuilding.org [mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Jason Boehning
Sent: Wednesday, August 11, 2010 4:14 PM
To: bldg-sim at lists.onebuilding.org
Subject: [Bldg-sim] Transformers in Energy Model

I am new to energy modeling and I am curious if there is a way to take credit for more efficient transformers in an energy model. Some of our transformer reps have said that there is not a LEED credit for more efficient transformers, but you have to gain the credit through the energy model. Would it just be through more heat in a space? I appreciate any information I can get in this matter.

Best Regards,


Jason Boehning, EIT

Mechanical Engineer

[cid:image001.gif at 01CB3972.A442D750]

6161 Savoy, Suite 1212
Houston, Texas  77036

 v.  713.482.2322
 f.   713.482.2314
 e. Jason.Boehning at ricegardner.com<mailto:Jason.Boehning at ricegardner.com>


This email and any files transmitted with it are confidential and intended solely for the addressee. If you are not the named addressee you should not disseminate, distribute, copy, or alter this email.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/bldg-sim-onebuilding.org/attachments/20100811/e1b5b6bd/attachment-0001.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image001.gif
Type: image/gif
Size: 3662 bytes
Desc: image001.gif
URL: <http://lists.onebuilding.org/pipermail/bldg-sim-onebuilding.org/attachments/20100811/e1b5b6bd/attachment-0001.gif>