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In the article, the analogy they're making is that watts are a measure of
a flow rate, vs the amount used (kWhm or, in the analogy, miles). Works
for me.<br><br>
Water flow rates, of course, are the more commonly cited analogy. So fuel
flow could work, too (for example, 10 gallons per hour, then times the
number of hours to get the amount), but a fuel gauge does not show the
flow rate. A speedometer does. (The fuel gauge shows energy remaining, or
the opposite of energy used.) And it's more tangible for most -- with the
exception of planes (and boats?), we generally think of fuel flow in
terms of mpg (is the metric equivalent kpl?), not gph.<br><br>
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>
David<br><br>
At 06:57 PM 11/20/2011, Nick Pyner wrote:<br>
<blockquote type=cite class=cite cite=""><font size=2 color="#0000FF">I
don't think that's a good analogy at all, and probably just adds to the
confusion. If you must use automotive terms, I submit it might be better
to use the fuel gauge than the speedo. 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>
</font> <br><br>
<font size=2>Nick Pyner<br><br>
Dee Why NSW <br>
</font>
<dl>
<dd><font face="Tahoma" size=2>-----Original Message-----<br>
<dd>From:</b> greenbuilding-bounces@lists.bioenergylists.org
[<a href="mailto:greenbuilding-bounces@lists.bioenergylists.org" eudora="autourl">
mailto:greenbuilding-bounces@lists.bioenergylists.org</a>]On Behalf Of
</b>David Bergman<br>
<dd>Sent:</b> Monday, 21 November 2011 7:02 AM<br>
</font><br>
<dd>Perhaps the best single way to think of it (per that article):
"Watts are like miles-per-hour."<br><br>
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</blockquote>
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