BTU should be a measure of heating content, so it will vary with composition. However, in the US, 1 cubic ft of natural gas = 1,028 BTU. 1 therm = 100,000 BTU 100 cf = 0.1 Mcf approximately 1 therm (th). or more exactly 0.0972 Mcf = 1 th. See natural gas under wikipedia.
According to U.S. EPA, Inventory of U.S. Greenhouse Gas Emissions and Sinks: 1990-2004, 1 therm of natural gas burnt produces 11.7 lbs. of carbon dioxide emissions. Therefore, the Carbon Coefficient for natural gas is: 117 pounds of CO2 per million BTU, or 0.12 pounds per cubic foot of gas.
Prices on both commodities depend on the market for which they are most closely associated with as well as the time of year ("season"). A gallon (Methane converted from MMBTu unit of measure to Gallon) to gallon comparison of Methane ("Natural Gas") to Propane currently tracks close, in some markets, Methane yeilding just under a dollar & propane above a dollar. (Note: prices are always subject to market conditions; supply, demand, associated expenses to take the product to market.)
1 UK cup = about 8.45 UK fluid ounces.
The "therm" is a unit of energy often used in connection with various methodsof home heating ... gas, oil, electric, etc.1 therm = 100,000 BTU = 1.055 x 108 joulesThat's the easy part. The next question is: How much energy do you getby burning a cubic meter of natural gas ? The references we found on linelisted the following answers (in mega-joules):37, 40, 37, 19 to 56, 37 to 41, 39, 38.Instead of agonizing over which one is correct, let's say there's a grain of truthin all of them, and take an average ... 38.21 megajoules per cubic meter. OK.Now we're ready to do the conversion for you:(1 therm/1.055 x 108 joule) x ( 38.21 x 106 Joule/cubic meter) =0.362 therm/cubic meter2.761 cubic meter/therm.Your answer is:Multiply therms by 2.761 to find out how many cubic meters of gasyou need to burn in order to produce that much heat.
10.28
100 cubic feet equals 1 therm
1 Therm is 100,000 BTU, and as there are 1000 BTU in 1 cubic foot of gas, 1 Therm = 100 cubic feet. Density of methane = 0.72 kg/cubic meter which is 35.3 cubic feet, so 100 cubic feet = 2.04 kg
BTU should be a measure of heating content, so it will vary with composition. However, in the US, 1 cubic ft of natural gas = 1,028 BTU. 1 therm = 100,000 BTU 100 cf = 0.1 Mcf approximately 1 therm (th). or more exactly 0.0972 Mcf = 1 th. See natural gas under wikipedia.
I had already done the calculation for raising water from 60f to 125f using a cost of $1 per therm. This should give you a rough idea. Q=c*m*(t2-t1), where, c=specific heat of water (1 calorie/gram) m=mass of 1 gal of water = 3780 grams t is in degrees celsius: 60f-125f ==> 15.5C-51.6C Using those values, Q=[1 cal/gm][3780 gm/gal][51.6C-15.5C] ==>136458 cal/gal There are 25200 Kilicalories/therm, so 1364548 calories = .005 therm. So, at $1/therm for natural gas, the cost to heat 1 gallon of water from 60f to 125f is about 1/2 cent.
According to U.S. EPA, Inventory of U.S. Greenhouse Gas Emissions and Sinks: 1990-2004, 1 therm of natural gas burnt produces 11.7 lbs. of carbon dioxide emissions. Therefore, the Carbon Coefficient for natural gas is: 117 pounds of CO2 per million BTU, or 0.12 pounds per cubic foot of gas.
A BTU is the amount of heat required to raise the temperature of 1 pound (0.454 kg) of liquid water by 1 °F (0.56 °C)therefore = to about 1055 joules.
I was just researching this same question today. Here's what I found hope it helps. 1 Therm = 100,000 BTU 10 Therms = 1MMBTU ( Million BTU's ) Therefore to convert from MMBTU to Therms, multiply the MMBTU figure by 10 to get Therms. Note: Therm to BTU conversion is based on the amount of energy obtained from burning 1 Therm (100 cubic feet of natural gas). This value is not exact, but close, and could be different from one natural gas field to another.
Prices on both commodities depend on the market for which they are most closely associated with as well as the time of year ("season"). A gallon (Methane converted from MMBTu unit of measure to Gallon) to gallon comparison of Methane ("Natural Gas") to Propane currently tracks close, in some markets, Methane yeilding just under a dollar & propane above a dollar. (Note: prices are always subject to market conditions; supply, demand, associated expenses to take the product to market.)
Casualty - 1986 Gas 1-1 is rated/received certificates of: UK:12
Bottom - 1991 Gas 1-2 is rated/received certificates of: UK:12 UK:15 (video rating) (1992)
1 therm = 100,000 Btu = 0.1 MMBtu = 1 CCF