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The heating value of natural gas varies depending on the composition of the gas, but it typically ranges from 950 to 1,050 British Thermal Units (BTUs) per cubic foot. The heating value of natural gas is the amount of heat released when the gas is burned. Not just the maintenance of heating systems, but thermal insulation is also an important factor to have a better heating efficiency. qs = Heat of combustion at constant volume (kJ/kg). Btu = British thermal units; scf = standard cubic feet. . The average gross heating value of natural gas is approximately 1,020 British thermal units per standard cubic foot (Btu/scf), usually varying from 950 to 1,050 Btu/scf. this website. The variation in quality may give heating values within a range 5 -10% higher and lower than the given value. These gases contribute to climate change and air pollution. Higher Heating Values mean that more energy can be extracted from a given quantity of natural gas, and this usually results in a higher price for the gas. Lesson plans, science fair experiments, field trips, teacher guide, and career corner. How to Calculate Heating Value of Natural Gas | Openlab Chemstation Intelligent Reporting, Find the composition of the natural gas by percentage, The typical composition of natural gas is approximately 85% methane, 10% ethane, 3% propane and 2% butane, Look up the heating value for each component in British Thermal Units per standard cubic foot (Btu/scf), The heating values for methane, ethane, propane and butane are respectively 1,031 Btu/scf, 1,075 Btu/scf, 1,265 Btu/sf and 2,488 Btu/sf, Multiply each components percentage by its heating value to find the total heating value of the natural gas sample, For example: 85% x 1,031 = 876 + 10% x 1,075 = 108 + 3% x 1 ,265 = 38 + 2% x 2 , 488 = 100 {OZN%}k:_M9d>Ij5..N}'8J*GII/?M'/:=-}\^%=} Natural gas has a high heating value, which makes it an efficient fuel for heating homes and businesses. Copyright 2023. Example: A natural gas water heater with an EF of .58 and a fuel cost of $0.00000109/therm. This is a useful quantity, commonly used to represent the energy density of a fuel, or the thermal energy that can be obtained from a fuel.