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# Conversion Factors

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edited February 2018

Conversion Factors

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great web
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I hope the steam professionals and newbees print this stuff and keep it in file. Years ago I bought a book on conversion formulas that had this data in it. The book cost me 30 dollars. You put a lot of effort in here, so thanks.
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I still have the Burnham Heating Helper. A pocket sized book that has just about all the info you need. I dont believe they offer it anymore. Probably online.
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btu/hr ~= 500 x gpm x delta t

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btu/hr ~= 500 x gpm x delta t

For extra points, where does the "500" come from?
"If you can't explain it simply, you don't understand it well enough"
Albert Einstein
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1 BTU by definition is the energy to raise 1 lb of water by 1 degree F.....
8.333 lb/gallon x 60 seconds/hour = 500 BTU / GPM-F-Hour
(note that this density is based on a water temperature of about 65F)
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> @Zman said:
> (Quote)
> For extra points, where does the "500" come from?

Total pounds of water flow in a minute, right?
You can have it good, fast or cheap. Pick two
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Pounds per gallon (8.34) X Minutes per hour (60) X specific heat of water (1) = 500.4.
When you get into other fluids you need to be careful. With glycol the 500 goes up a little.

"If you can't explain it simply, you don't understand it well enough"
Albert Einstein
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Canucker said:

> @Zman said:

> (Quote)

> For extra points, where does the "500" come from?

Total pounds of water flow in a minute, right?

Nope. it's total pounts of water flow in an HOUR
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I read somewhere that a 1,000 gallons of #2 heating oil had the same amount of BTU's as a cord of mixed hardwoods.
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It looks lie a cord of would is closer to 160 gallons of oil.
"If you can't explain it simply, you don't understand it well enough"
Albert Einstein
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This keeps me awake at night, the gas meter on the side of the house reads in cubic feet, but the gas company bills me in giga-joules. Why convert for billing?
The electric meter reads in watts, or kilowatts, and they bill me in kilowatts.
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> @Reez said:
> (Quote)
> Nope. it's total pounts of water flow in an HOUR

Ain't nightshift brain awesome?
You can have it good, fast or cheap. Pick two
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Zman said: