[TheForge] propane vs coal in current energy market

[Andy Vida]

Darrell wrote:
> 
>  The heat content of bituminous coal ranges from 21 to 30 million Btu/ton
> About 92,000 BTU's per gallon of propane.
> At $1.29 per gallon, it would take between 228 and 326 dollars worth of
> propane to get the same number of BTU as a ton of coal.

	Noticed this as I was deleting old messages.

	THis may be true, but the "in vacuo" numbers may not tell the
	story.  Gas may be more efficient in that the heat is usually
	better contained whereas coal lies open and throws a lot of
	BTUs to the open air.

	Just half a thought.

	-andy