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Old 01-04-2009, 02:01 PM   #1
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Btu's and watts


What's the correlation between Btu's and watts? Ex. 10,000 Btu's = ? watts

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Old 01-04-2009, 02:10 PM   #2
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Btu's and watts


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What's the correlation between Btu's and watts? Ex. 10,000 Btu's = ? watts
BTU is a measure of energy, whereas watts is a measure of power. Power being the time rate consumption of energy. 1 BTU is about 1055 joules, and 1 watt is 1 joule per second. So 1 BTU is equivalent to the energy consumed by a 60 watt light bulb in about 18 seconds.

10,000 BTU = 2930.5 watt-hours

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Old 01-04-2009, 03:09 PM   #3
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Btu's and watts


Thanks InPhase!
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Old 01-04-2009, 04:16 PM   #4
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Btu's and watts


You can use this calculator to convert energy expressed as Joules, BTUs or Kilowatt hours into one of the other measurements,

and then divide by time to determine the power expressed as horsepower, watts or BTU/hr.

http://www.mhi-inc.com/Converter/watt_calculator.htm
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Old 01-04-2009, 04:25 PM   #5
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Btu's and watts


100w for 100 milliseconds is how many watt·hours?
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Old 01-04-2009, 04:40 PM   #6
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Btu's and watts


1 watt = 3.4 BTUs.
Don't forget to figure in the inefficiencies of the equipment.
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Old 01-04-2009, 04:50 PM   #7
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Btu's and watts


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1 watt = 3.4 BTUs.
Don't forget to figure in the inefficiencies of the equipment.
3.4 BTU/hr maybe, not BTU. There is a difference.
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Old 01-04-2009, 04:56 PM   #8
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Btu's and watts


Even with this
http://www.onlineconversion.com/
it can still be confusing
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Old 01-04-2009, 05:01 PM   #9
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Btu's and watts


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100w for 100 milliseconds is how many watt·hours?
I don't know about watt-hours, but it is about

0.000000011 horsepower-fortnights
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Old 01-04-2009, 05:05 PM   #10
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Btu's and watts


Yeah, I get 1.108x[10^(-8)] but it should be reported as 1x[10^(-8)] or 1.11x[10^(-8)] since there is only one significant figure or three significant figures in 100w and 100 mS, we don't know. . .

What are we turning into???

Last edited by Yoyizit; 01-04-2009 at 05:10 PM.
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Old 01-04-2009, 06:03 PM   #11
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Btu's and watts


Quote:
Originally Posted by Yoyizit View Post
100w for 100 milliseconds is how many watt·hours?
100*.001=.1 watt second
Convert to minutes divide by 60(60 seconds in minute)
convert to hours divide by 60 again(60 minutes in hour)
.1/60/60 = .00000277 watt-hour
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Old 01-04-2009, 06:23 PM   #12
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Btu's and watts


One of the more common conversions is
1 kWh = 3412 BTU/hour

With that simple conversion, you can compare the difference and efficiencies of electric vs gas vs oil, etc.

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