Get Heating Value Of Natural Gas Btu US. A british thermal unit (btu) is a measure of the heat content of fuels or energy sources. It's short for british thermal unit, which is the amount of heat you need to increase the temperature of 1 pound of water 1 degree fahrenheit.
Lower heating value considers vapor not to be useful and does not count its energy.
The most common unit for measuring natural gas is the therm. Propane & natural gas btus and gas pressures: Commercial building with a 2 mm btu heating loa d. Next, you need values for the heat of reaction for oxidation of each constituent to co2 and h2o.