<html>
<body>
Completely agree. It's also why the term kilowatt-hours is so confusing
to most folks (many of who think it is kilowatt per hour).<br><br>
David<br><br>
At 10:04 AM 11/21/2011, Alan Abrams wrote:<br>
<blockquote type=cite class=cite cite="">methinks that what is
problematical is semantical. if it is gallons of milk that are
important to a mother, and gallons of milk per hour that are important to
a milkmaid, and if these terms are logical and intuitive--then watts
should logically be the term for the volume of electricity consumed, and
watts per hours should be the term for the rate. <br><br>
but it's not. hence the confusion.<br><br>
On Mon, Nov 21, 2011 at 7:06 AM, nick pine
<<a href="mailto:nick@early.com">nick@early.com</a>> wrote:<br>
<dl>
<dd>David Bergman writes:<br><br>
<dl>
<dd>The article also says, btw, that watts are comparable to horsepower.
But I do find their explanation before that rather confusing: "A
laborer working through the day will put out 75 watts of power. A
medium-sized car might consume 100,000 watts." Those sound like
energy totals, not flows.,<br><br>
</dl><br>
<dd>Perhaps the intent was to say that the laborer can generate 75 watts
for a long time, vs 300 watts for a shorter time. And accelerating a 4000
pound car from 0 to 60 mph takes about 1/2mV^2 =
1/2x4000x0.454lb/kg(60x0.447)^2 = 653K joules. If that happens in 6
seconds, it might require a constant 653K/6 = 109K joules per second, ie
109 kW for 6 seconds, or perhaps more power and smoke at the beginning
and less at the end, at a non-constant rate.<br><br>
<dd>Nick Pyner wrote:<br><br>
<dl>
<dd>... If you must use automotive terms, I submit it might be better to
use the fuel gauge than the speedo.<br><br>
</dl><br>
<dd>The rate of change of the fuel gauge is closer to power than the
speedo.<br><br>
<br>
<dl>
<dd>Or how about the engine? A watt is exactly like a horsepower, just
3/4 the size, and most of the world uses just that.<br><br>
</dl><br>
<dd>One horsepower is about 3/4 of a kilowatt, like 10 75-watt
people.<font color="#888888"><br><br>
<dd>Nick <br>
</font><br>
<dd>_______________________________________________<br>
<dd>Greenbuilding mailing list<br>
<dd>to Send a Message to the list, use the email address<br>
<dd><a href="mailto:Greenbuilding@bioenergylists.org">
Greenbuilding@bioenergylists.org</a><br><br>
<dd>to UNSUBSCRIBE or Change your List Settings use the web page<br>
<dd>
<a href="http://lists.bioenergylists.org/mailman/listinfo/greenbuilding_lists.bioenergylists.org">
http://lists.bioenergylists.org/mailman/listinfo/greenbuilding_lists.bioenergylists.org</a>
<br><br>
</dl><br>
_______________________________________________<br>
Greenbuilding mailing list<br>
to Send a Message to the list, use the email address<br>
Greenbuilding@bioenergylists.org<br><br>
to UNSUBSCRIBE or Change your List Settings use the web page<br>
<a href="http://lists.bioenergylists.org/mailman/listinfo/greenbuilding_lists.bioenergylists.org" eudora="autourl">
http://lists.bioenergylists.org/mailman/listinfo/greenbuilding_lists.bioenergylists.org</a>
</blockquote>
<x-sigsep><p></x-sigsep>
<br>
David Bergman RA LEED AP<br>
<font size=2 color="#808080"><b>DAVID BERGMAN</b> ARCHITECT / <b>FIRE
& WATER</b> LIGHTING + FURNITURE<br>
</font><font color="#808080">architecture . interiors .
</font><font color="#008080">ecodesign</font><font color="#808080"> .
lighting . furniture<br>
</font><font size=2 color="#808080">bergman@cyberg.com
<a href="http://www.cyberg.com/" eudora="autourl"><u>www.cyberg.com</a>
</u></font><font color="#808080"> <br>
</font><font size=2 color="#808080">241 Eldridge Street #3R, New York, NY
10002<br>
</font><font color="#808080">t </font><font size=2 color="#808080">212
475 3106 f 212 677 7291</font><font color="#808080">
</font></body>
</html>