Aeriform discharge measures an unit to use standard stere, we often call copy quality unit, because it looks,be like bulk unit, it is quality unit actually, it and the pressure of use place, temperature does not have any relations, if gas is natural gas, the quality of 1 standard stere still is concerned with the constituent of natural gas, energy unit is used when close an account of natural gas trade is metric more reasonable because same natural gas is qualitative,measure, if constituent is different, criterion its send quantity of heat to also differ.

Exemple: Air kilogram of =1.2041 of 1 standard stere (standard reference conditions is 101.325 KPa, 20 ° C)

Discharge 100 M³/ H (standard reference conditions) =120.41 Kg/h

Natural gas sets natural gas opposite density D=0.6, criterion

0.6=0.7225 Kg of × of =1.2041 of 1 standard stere

Discharge 100 M³/ H (standard reference conditions) =72.25 Kg/h

No matter force of middling pressure of standard reference conditions is domestic and international it is standard atmosphere, namely 101.325 KPa, but temperature is endless and identical, I have level of 2 kinds of temperature too, 20 ° C, 0 ° C.

Natural gas uses 20 ° C, gas with 0 ° C or 20 ° C, historical reason causes this. In trade close an account contract both sides can talk things over with any temperature, call contract temperature.

15.6 ° C is used on international (60 ° F) or 15 ° C (59 ° F) .

Flowmeter measures a flow of operating mode bulk, need classics pressure, temperature conversion (with flow figure implement) and.

Its conversion formula is

In type

Q_Vn, Q_V-- issue the bulk discharge with working status for standard reference conditions respectively, M³/ H;

P_N, p -- issue the absolutely pressure with working status for standard reference conditions respectively, pa;

T_N, t -- issue the thermodynamic temperature with working status for standard reference conditions respectively, k;

Z_N, z -- fall to compress coefficient with the gas of working status for standard reference conditions respectively.
Previous12 Next

Previous:ISO 5167:2003(E) " buy of the press fitting that use difference measures liquid
Next：Mix the thickness that gas flowmeter measures to make good omissions