OT: Natural gas vs LPG

LP gas runs 96,000 btu / liquid gallon according to my reference (LP GAS UTILIZATION HANDBOOK). So to a first approximation, on gallon of LP is one therm.

Used to be LP ran about 4 times natural gas for home use. Natural gas has risen and so has LP but maybe not as fast.

Gerald J.

a house on natural gas has an average working pressure of 3 to 5 p.s.i.

orifices are used to convert an appliance from NG to LP !!! orifices for lp are on the average of two thirds smaller then that of a NG orifice. natural gas uses gas meters to measure the amount of nat. gas used in a home, they are notorius to everyone in the gas industry to be out of calibration and not in the publics favor.

a month ago in lancaster county,pa. a house was leveled by a NAT.gas leak. being a new developement of 108 homes, the township had the nat. gas company check all the houses for leaks,, they found 37 leaks and the public was told that they were outside at the meters and were of no threat and should not be concerned.

MAY GOD BLESS THE USA

Ichabod

PV = nRT

where P = pressure
V= volume
n = Avagadro"s number (or was it moles?)
R= Ideal Gas Constant
T = Temp

All units would be metric, of course (Pascals, Litres, Kelvin).

Energy content will depend on C___C and C___H bonds ratios, water content and whatever else might be present.
I don"t think we covered much on Btu"s - already gone out of fashion in 1960s.
Used to use Kilocalories, now use Joules. Everything is so much easier in S.I. units.

However, as you can see, you are comparing "apples with oranges" with volumes of liquid and gas fuels (different pressures and therefore volumes). Need to get them at a standard temperature and pressure before you even start to compare energy content, let alone prices. No mention of transport and scrubbing costs or operating costs and profit margins, capital cost of well-head and pipeline etc.

There is much more energy in a C___C bond (none in methane) than in a C___H bond (as in methane)
If I were you I would not worry unless you can do something about it when you know the answer.
Regards, RAB

By the way, when I was in Junior High in the 70"s we were taught the metric system (SI) in math and in science getting ready for the big transition required by law coming in the 90"s. Metric is a much much easier system to learn and to use. I really hated it when they realized at the last moment that the conversion date for the U.S. was nearing and they changed the law at the last minute. They don"t know how simpler life would have been.

I get more information here than anywhere else. Well, except for my 17 year old son, who knows everything. (Takes after me when I was his age).

• Gas info

Nathaniel

Pooh Bear

When measuring gases, the common practice is to "standardize" the gas at 1 atmosphere pressure(atm) (about 14.7 pounds per square inch, absolute at sea level), 60 degrees Farenheit.

For consistency, ft^3 is the most commonly used volume measurement. The amount of gas contained in 1 ft^3, at 1 atm, at 60 deg F is called "1 standard cubic foot, or 1 SCF.

For flow volumes, this is divided by minutes. Typical gas flows are given in SCFM (standard cubic feet per minute) or multiples thereof.