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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Thank you all; till now, I could not find
a stand alone system that measures the Kwh for multi circuits control panel.
The HOBO system can do that, but only by tweaking the system and having many
extra equipment (cost will be over $7,000.00). I do not know why I could not
digest the idea that a multi circuit Kwh monitoring system does not exist!<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>H<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal><strong><b><font size=3 color=maroon face=Verdana><span
style='font-size:12.0pt;font-family:Verdana;color:maroon'>Hussein Abaza, Ph.D</span></font></b></strong><em><i><font
color=maroon face=Verdana><span style='font-family:Verdana;color:maroon'>.</span></font></i></em><em><i><font
size=2 color=maroon face=Verdana><span style='font-size:10.0pt;font-family:
Verdana;color:maroon'><o:p></o:p></span></font></i></em></p>
<p class=MsoNormal><st1:place w:st="on"><st1:PlaceType w:st="on"><st1:place
w:st="on"><st1:PlaceType w:st="on"><em><i><font size=3 color=green
face=Verdana><span style='font-size:12.0pt;font-family:Verdana;color:green'>School</span></font></i></em></st1:PlaceType><em><i><font
color=green face=Verdana><span style='font-family:Verdana;color:green'> of <st1:PlaceName
w:st="on">Architecture</st1:PlaceName></span></font></i></em></st1:place><em><i><font
color=green face=Verdana><span style='font-family:Verdana;color:green'>, CET,
and Construction</span></font></i></em></st1:PlaceType></st1:place><font
color=navy><span style='color:navy'><o:p></o:p></span></font></p>
<p class=MsoNormal><em><i><font size=3 color="#003300" face=Verdana><span
style='font-size:12.0pt;font-family:Verdana;color:#003300'>Construction
Management Department </span></font></i></em><em><i><font size=2 color="#003300"
face=Verdana><span style='font-size:10.0pt;font-family:Verdana;color:#003300'><o:p></o:p></span></font></i></em></p>
<p class=MsoNormal><em><i><font size=3 color="#003300" face=Verdana><span
style='font-size:12.0pt;font-family:Verdana;color:#003300'>Phone 678-915-3719<o:p></o:p></span></font></i></em></p>
<p class=MsoNormal><em><i><font size=3 color="#003300" face=Verdana><span
style='font-size:12.0pt;font-family:Verdana;color:#003300'>Fax: 678-915-4966<o:p></o:p></span></font></i></em></p>
<p class=MsoNormal><em><i><font size=3 color=navy face=Verdana><span
style='font-size:12.0pt;font-family:Verdana;color:navy'>Email </span></font></i></em><font
color=navy><span style='color:navy'><a href="mailto:ahussein@spsu.edu"><em><i><font
color=navy face=Verdana><span style='font-family:Verdana;color:navy;text-decoration:
none'>ahussein@spsu.edu</span></font></i></em></a><o:p></o:p></span></font></p>
</div>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<div>
<div class=MsoNormal align=center style='text-align:center'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'>
<hr size=2 width="100%" align=center tabindex=-1>
</span></font></div>
<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'> Jeff Hirsch
[mailto:Jeff.Hirsch@DOE2.com] <br>
<b><span style='font-weight:bold'>Sent:</span></b> Tuesday, April 28, 2009
11:30 AM<br>
<b><span style='font-weight:bold'>To:</span></b> Keith Swartz;
ahussein@spsu.edu<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [Bldg-sim] FW:
Electric sub-meter</span></font><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>measurement of just amps is not a good idea in most areas we
have worked</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>within, especially in residential districts. For
utilities in CA the voltage variations</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>are too significant to get a result within a few percent.
Differential compressor</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>loading during the day also causes some variation in power
factor. Best to</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>measure true power if you want better than +-20%.</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'>--- <br>
Jeff Hirsch<br>
James J. Hirsch & Associates<br>
<st1:Street w:st="on"><st1:address w:st="on">12185 Presilla Road</st1:address></st1:Street><br>
<st1:place w:st="on"><st1:City w:st="on">Camarillo</st1:City>, <st1:State
w:st="on">CA</st1:State> <st1:PostalCode w:st="on">93012-9243</st1:PostalCode>
<st1:country-region w:st="on">USA</st1:country-region></st1:place><br>
phone: (805) 553-9000<br>
fax: (805) 532-2401<br>
email: <a href="mailto:Jeff.Hirsch@DOE2.com">Jeff.Hirsch@DOE2.com</a><br>
web: <a href="http://DOE2.com">http://DOE2.com</a><br>
skype: jeffhirschcamarillo <br>
<br>
<o:p></o:p></span></font></p>
</div>
<blockquote style='border:none;border-left:solid black 1.0pt;padding:0in 0in 0in 3.0pt;
margin-left:2.5pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt'>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>----- Original Message ----- <o:p></o:p></span></font></p>
</div>
<div style='font-color:black'>
<p class=MsoNormal style='background:#E4E4E4'><b><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial;font-weight:bold'>From:</span></font></b><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'> <a
href="mailto:kswartz@ecw.org" title="kswartz@ecw.org">Keith Swartz</a> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><b><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial;font-weight:bold'>To:</span></font></b><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'> <a
href="mailto:ahussein@spsu.edu" title="ahussein@spsu.edu">ahussein@spsu.edu</a>
<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><b><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial;font-weight:bold'>Cc:</span></font></b><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'> <a
href="mailto:bldg-sim@lists.onebuilding.org"
title="bldg-sim@lists.onebuilding.org">bldg-sim@lists.onebuilding.org</a> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><b><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial;font-weight:bold'>Sent:</span></font></b><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'> Tuesday, April 28,
2009 7:38 AM<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><b><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial;font-weight:bold'>Subject:</span></font></b><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'> [Bldg-sim] FW:
Electric sub-meter<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'>Hussein,<br>
<br>
A colleague of mine, who specializes in residential energy, has some
recommendations below for electric sub-meters.<br>
<br>
_____________________<br>
<br>
Keith Swartz, P.E., LEED AP<br>
Energy Engineer / Senior Project Manager<br>
<st1:PlaceName w:st="on">Energy</st1:PlaceName> <st1:PlaceType w:st="on">Center</st1:PlaceType>
of <st1:State w:st="on"><st1:place w:st="on">Wisconsin</st1:place></st1:State><br>
<st1:Street w:st="on"><st1:address w:st="on">455 Science Drive, Suite 200</st1:address></st1:Street><br>
<st1:place w:st="on"><st1:City w:st="on">Madison</st1:City>, <st1:State w:st="on">WI</st1:State>
<st1:PostalCode w:st="on">53711</st1:PostalCode></st1:place><br>
Phone: 608.238.8276 x123<br>
Fax: 608.238.0523<br>
Email: <a href="mailto:kswartz@ecw.org">kswartz@ecw.org</a><br>
Web: <a href="http://www.ecw.org">www.ecw.org</a><br>
<br>
<st1:place w:st="on"><st1:PlaceName w:st="on">Energy</st1:PlaceName> <st1:PlaceType
w:st="on">Center</st1:PlaceType> <st1:PlaceType w:st="on">University</st1:PlaceType></st1:place><br>
Your gateway to sustainable design training and online education programs.<br>
<a href="http://www.ecw.org/university/">www.ecw.org/university/</a><br>
<br>
-----Original Message-----<br>
From: Scott Pigg<br>
Sent: Monday, April 27, 2009 10:03 AM<br>
To: Keith Swartz<br>
Subject: RE: [Bldg-sim] Electric sub-meter<br>
<br>
<br>
Not sure if this is for permanent or temporary (research purposes). If
the latter, Onset (<a href="http://www.onsetcomp.com">www.onsetcomp.com</a>)
makes some multi-circuit data loggers for power monitoring. Also Dent
instruments.<br>
<br>
As far as low-cost monitoring of HVAC compressors, I have had good look by
simply monitoring amps (say a snapshot of amp draw every 90 seconds), and
combining w/ a one-time measurement of voltage and power factor. On a daily
basis, the average of all those amperage measurements works out to a good
estimate of daily kWh within a percent or two (I've had a couple of
opportunities to cross-check against actual daily kWh). It's much cheaper
(both in terms of equipment costs and installation time) to track amperage than
actual kWh or watts.<br>
<br>
Scott<br>
<br>
-----Original Message-----<br>
From: Keith Swartz<br>
Sent: Monday, April 27, 2009 9:27 AM<br>
To: Scott Pigg<br>
Subject: FW: [Bldg-sim] Electric sub-meter<br>
<br>
Scott,<br>
<br>
Do you have any recommendations for home submeters for the gentleman below?<br>
<br>
_____________________<br>
<br>
Keith Swartz, P.E., LEED AP<br>
Energy Engineer / Senior Project Manager<br>
<st1:PlaceName w:st="on">Energy</st1:PlaceName> <st1:PlaceType w:st="on">Center</st1:PlaceType>
of <st1:State w:st="on"><st1:place w:st="on">Wisconsin</st1:place></st1:State><br>
<st1:Street w:st="on"><st1:address w:st="on">455 Science Drive, Suite 200</st1:address></st1:Street><br>
<st1:place w:st="on"><st1:City w:st="on">Madison</st1:City>, <st1:State w:st="on">WI</st1:State>
<st1:PostalCode w:st="on">53711</st1:PostalCode></st1:place><br>
Phone: 608.238.8276 x123<br>
Fax: 608.238.0523<br>
Email: <a href="mailto:kswartz@ecw.org">kswartz@ecw.org</a><br>
Web: <a href="http://www.ecw.org">www.ecw.org</a><br>
<br>
<st1:place w:st="on"><st1:PlaceName w:st="on">Energy</st1:PlaceName> <st1:PlaceType
w:st="on">Center</st1:PlaceType> <st1:PlaceType w:st="on">University</st1:PlaceType></st1:place><br>
Your gateway to sustainable design training and online education programs.<br>
<a href="http://www.ecw.org/university/">www.ecw.org/university/</a><br>
<br>
<br>
-----Original Message-----<br>
From: Abaza Hussein [mailto:ahussein@spsu.edu]<br>
Sent: Saturday, April 25, 2009 11:30 PM<br>
To: <a href="mailto:bldg-sim@lists.onebuilding.org">bldg-sim@lists.onebuilding.org</a><br>
Subject: [Bldg-sim] Electric sub-meter<br>
<br>
Could any one help in recommending a multi circuit sub-meter to monitor energy
consumption in houses. and also low-cost submeters to monitor the HVAC
compressor electric consumption (since I need many of them).<br>
Thank you<br>
H. Abaza<br>
SPSU<br>
<br>
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<o:p></o:p></span></font></p>
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