I need the brief answers of this question?
2007-05-29 05:22:20 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
You need a calorimeter.
2007-05-29 06:30:44 · answer #1 · answered by ag_iitkgp 7 · 0⤊ 0⤋
Calorific value (CV) is a measure of heating power and is dependent upon the composition of the gas. The CV refers to the amount of energy released when a known volume of gas is completely combusted under specified conditions.
The CV of gas, which is dry, gross and measured at standard conditions of temperature and pressure, is usually quoted in megajoules per cubic metre (MJ/m3).
Gas passing through the Transco pipeline system has a CV of 37.5 MJ/m3 to 43.0 MJ/m3, with the exception of Stornoway which receives liquid petroleum gas.
IMPORTANCE OF CALORIFIC VALUE
Knowledge of the CV of natural gas is an essential part of the day to day activities of Transco as this information is used to determine the amount of energy transported by Transco. CV information is provided daily to gas shippers and suppliers, which is then used to bill gas consumers. This data is also used by Transco to determine transportation charges for gas shippers and suppliers.
HOW CALORIFIC VALUE MEASURED
The CV of natural gas is measured continually using process gas chromatographs.
Process gas chromatographs separate natural gas into its constituent compounds (i.e. methane, ethane, carbon dioxide, etc.) and measure the amount of each in the gas. The physical characteristics of each component, as defined by ISO 6976, are programmed into the chromatograph and an overall CV is derived from the measured composition.
The determination of the CV of gas is carried out in accordance with international standards and the Gas (Calculation of Thermal Energy) Regulations, as amended in 1997. These regulations stipulate when and where the CV of gas is measured and the type of instrument to be used. The regulations are enforced by Ofgem, who also perform audit checks on the primary data
WHERE IT IS MEASURED
The calorific value of natural gas is measured at reception terminals and other locations on the Transco pipeline system
At present the CV of gas is measured at over 110 different locations
Calculation of Thermal Energy
The amount of energy consumed by a customer is calculated using the following formula:
ENERGY= (CORRECTED VOLUME *CV) / 3.6
Volume is in cubic meter (m3)
CV is in MJ/m3
Energy is in kilowatt hours (kWh)
2007-05-29 05:47:48 · answer #2 · answered by sasi k 2 · 0⤊ 0⤋
NO, it does not. Oxygen just supports combustion, it is not a combustible substance.
2016-04-01 02:52:42 · answer #3 · answered by Anonymous · 0⤊ 0⤋