[Equest-users] PV inverter heat?

Nicholas Caton via Equest-users equest-users at lists.onebuilding.org
Thu Mar 2 15:47:08 PST 2017


Crazy talk!  (and I mean that in the most positive way!)

If you set up everything perfectly, I don't reckon the solar gain would track perfectly with the heat output of the inverter however... if you think of this window oriented to match the PV array panels, they are making some juice (and waste heat) when there isn't a "direct solar gain" but they're still getting energy when the sun is out of the line of sight.  I imagine there's some degree of "standby" power / heat gain as well when the PV panels are asleep at night.

Still set up well it could be a decent & quick stand-in for a more laborious 8760 schedule calculation to crunch and push into the model.

Once upon a time I lamented that transformers losses specified at the meter in eQUEST can't be attributed to a space/zone... Didn't foresee this potential application as I was focused on quantifying "premium efficiency" transformer savings, but alas I suspect that feature remains on the back burner.

[cid:image001.png at 01D2937C.5F1F99E0]
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:image002.png at 01D2937C.5F1F99E0]



From: Equest-users [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Bishop, Bill via Equest-users
Sent: Friday, February 24, 2017 11:50 AM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] PV inverter heat?

I'm working on a small net-positive-energy project in New York and considering all low-energy options for heating the building. It will have a PV system and I'd like to model waste heat from the inverter to consider putting it indoors. The waste heat would be a sensible heat gain that varied with solar radiation. (The greater the solar radiation, the higher the PV output and the more waste heat off the inverter, on the order of 400 watts for an 8 kW system.) I'm thinking of modeling the inverter as a south-facing window since heat gain to the space would vary with solar radiation. The trick would be to zero out as much as possible the window thermal conductance or make it equal to the outside wall value.
Thoughts?

Thanks,
~Bill

William Bishop, PE, BEMP, BEAP, CEM, LEED AP | Pathfinder Engineers & Architects LLP
Senior Energy Engineer

[cid:image004.jpg at 01D2937C.FFDDA7F0]  [cid:image006.jpg at 01D2937C.FFDDA7F0]



134 South Fitzhugh Street                 Rochester, NY 14608

T: (585) 698-1956                        F: (585) 325-6005

bbishop at pathfinder-ea.com<mailto:wbishop at pathfinder-ea.com>             www.pathfinder-ea.com<http://www.pathfinder-ea.com/>

[http://png-5.findicons.com/files/icons/977/rrze/720/globe.png]Carbon Fee and Dividend - simple, effective, and market-based.



______________________________________________________________________
This email has been scanned by the Symantec Email Security.cloud service.
______________________________________________________________________
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20170302/ee7ea059/attachment-0004.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image001.png
Type: image/png
Size: 255 bytes
Desc: image001.png
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20170302/ee7ea059/attachment-0015.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image002.png
Type: image/png
Size: 8477 bytes
Desc: image002.png
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20170302/ee7ea059/attachment-0016.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: oledata.mso
Type: application/octet-stream
Size: 7134 bytes
Desc: oledata.mso
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20170302/ee7ea059/attachment-0005.obj>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image004.jpg
Type: image/jpeg
Size: 1242 bytes
Desc: image004.jpg
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20170302/ee7ea059/attachment-0010.jpg>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image006.jpg
Type: image/jpeg
Size: 1308 bytes
Desc: image006.jpg
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20170302/ee7ea059/attachment-0011.jpg>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image008.png
Type: image/png
Size: 2847 bytes
Desc: image008.png
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20170302/ee7ea059/attachment-0017.png>


More information about the Equest-users mailing list