BTU per pound Propane vs ULSD

More curious...

An unvented 10,000 BTU heater is said to generate heat 132% as long on a gallon of kerosene rather than propane.

BUT...The HYDROGEN, in H2O.......is combusted ..so, there is that....:W

JaxDad wrote:

kellertx5er wrote:

MEXICOWANDERER wrote:
Since LPG has a weight per cubic foot density similar to diesel it would make sense that BTU specs would be the same. However substituting LPG as a motor fuel reveals a drastic sum difference in economy. This is curious.

Water has 20% greater density than diesel, but I have yet to find a way to burn it!

They’ve been doing it since the 1800’s.

Google “oxyhydrogen generator”.

Wiki entry for Oxyhydrogen

A Canadian company developed a process a few years back where they added a device to transport trucks that converted distilled water into Oxyhydrogen and injected it into the engine when the turbo came on as a power booster of sorts. It works quite well, far better overall than propane injection.

This process involves the combustion of hydrogen and oxygen gasses. I was speaking of the LIQUID known as 'water'.

kellertx5er wrote:

MEXICOWANDERER wrote:
Since LPG has a weight per cubic foot density similar to diesel it would make sense that BTU specs would be the same. However substituting LPG as a motor fuel reveals a drastic sum difference in economy. This is curious.

Water has 20% greater density than diesel, but I have yet to find a way to burn it!

They’ve been doing it since the 1800’s.

Google “oxyhydrogen generator”.

Wiki entry for Oxyhydrogen

A Canadian company developed a process a few years back where they added a device to transport trucks that converted distilled water into Oxyhydrogen and injected it into the engine when the turbo came on as a power booster of sorts. It works quite well, far better overall than propane injection.

MEXICOWANDERER wrote:
Since LPG has a weight per cubic foot density similar to diesel it would make sense that BTU specs would be the same. However substituting LPG as a motor fuel reveals a drastic sum difference in economy. This is curious.

Water has 20% greater density than diesel, but I have yet to find a way to burn it!

i was thinking something similar
engine operation, depends on flame propagation and the pressure created in the combustion chamber, to drive the piston down

MEXICOWANDERER wrote:
Since LPG has a weight per cubic foot density similar to diesel it would make sense that BTU specs would be the same. However substituting LPG as a motor fuel reveals a drastic sum difference in economy. This is curious.

Simple science actually, propane makes the same(ish) heat as diesel but it doesn't explode as fast as vapourized diesel, especially under pressure, so it takes a lot more propane to accomplish the same work.

Thus when burning it slowly (compared to an ICE) you get similar heat, because the losses are mostly eliminated.

Since LPG has a weight per cubic foot density similar to diesel it would make sense that BTU specs would be the same. However substituting LPG as a motor fuel reveals a drastic sum difference in economy. This is curious.

Since they're both hydrocarbons, I guess it rather makes sense that per pound they have similar energy content.

Per gallon, USLD has about 50% greater energy density (and ordinary mass density).

I need to do more research :)

Kerosun 10,000 BTU heater says one gallon lasts 10-12 hours. A 10,000 BTU LPG heater would therefore last 8 hours or so with a gallon of LPG?

A gallon of ULSD costs $3.90 down here. LPG is about $2.50 gallon but a lot more inconvenient.

Maybe a larger tank? Sure goes not seem to be a lot of difference in energy per gallon or per lb.