🚀 go-pugleaf

In article <124@kc2wz.bubble.org> bob@kc2wz.bubble.org (Bob Billson) writes:
+I need to determine how much some particular electronic is costing me to run.
+For the sake of example, I need to know the cost of running something consuming
+100 watts, all day long, all month long.  I know the cost the power company
+charges per kilowatt-hour.  Can someone provide an equation to convert the
+equipment's power rating to kilowatt-hours?
+
+Simply using:
+
+         (power_rating/1000) * hours_used * days_used
+
+does not work out correctly (or so it seems).  Help? :-)  Thanks
+
+       Bob
+-- 
+  Bob Billson, KC2WZ                          | internet: bob@kc2wz.bubble.org
+                                              |           kc2wz@amsat.org
+  $nail:  21 Bates Way,  Westfield, NJ 07090  | uucp:     ...!uunet!kc2wz!bob
+                  C code.  C code run.  Run code run...<please!>


Huh?  Your math is fine.  What do you mean "doesn't work out correctly"?

Maybe what's confusing is that the way the power company charges.
Some charge $X1 for the first N1 KWH, $X2 for the next N2 KWH, etc.

Or is the device really using as much power as you think?  A light bulb
left on all the time will give you the right answer, but just because
a stereo amplifier is rated at 100W doesn't mean that's what it's using
all the time.  If you're not sure you may wish to measure the AC current
at typical usage.



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Aaron Endelman  KK6QH                                 endelman@eng.sun.com
SPARCworks IBEx Group
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