The significance of the gas flow measurement unit standard cubic meters
Published on：2015-1-28 11:02:05 Hits：
Gas flow measurement unit standard cubic, we often called imitation mass units, because it appears to volume units, in fact, for the mass unit, place of use it with pressure, temperature does not have any relationship, if the gas is natural gas, a standard cubic meter the quality is also related to the component of natural gas, the use of energy per unit is reasonable because the same quality of natural gas, such as its different components, its heat is also different when trade settlement metering of natural gas.
Example: 1 standard cubic meter of air = 1.2041 kg (standard conditions 101.325 kPa, 20 ° C)
Flow rate 100 m 3 / h (standard state) = 120.41 kg / h
Natural gas disposed relative density d = 0.6, then
1 standard cubic meter = 1.2041 × 0.6 = 0.7225 kg
Flow rate 100 m 3 / h (standard state) = 72.25 kg / h
Standard state is standard atmospheric pressure at home and abroad, whether, that is 101.325 kPa, but the temperature is not the same, I too have two kinds of standard temperature, 20 ° C, 0 ° C.
Natural gas with 20 ° C, 0 ° C or gas with 20 ° C, which is the historical reasons. In trade settlement the parties may negotiate with any one temperature, called the contract temperatures.
The international community is using 15.6 ° C (60 ° F) or 15 ° C (59 ° F).
Measuring the volumetric flow meter and labor, subject to pressure, temperature conversion (using flow routing device) derived.
The conversion formula is
q vn, qv - were under standard conditions and working conditions of the volumetric flow rate, m 3 / h;
pn, p -, respectively, under standard conditions and working conditions of absolute pressure, Pa;
T n, T -, respectively, under standard conditions and working conditions of thermodynamic temperature, K;
Z n, Z -, respectively, under standard conditions and the operating state of the gas compression factor.
Editor's note: Some comrades asked gas flow measurement units: standard cubic meters of questions are comrades SUN Huai Qing please answer. Reference for use!
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