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Over 1000 Windows 95 Programs (Microforum) (Disc 2).iso
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text2.txt
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1996-06-01
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\B2.0 USING 'ISO'\b
\BSTEP 1:\b
Install the program:
a) DOS version:
Put the program diskette in drive A and type: A:\\INSTALL
This will install the DOS-programs in directory C:\\ORIFICE
or show you how to install the program in a directory of your
choice.
b) Windows version:
The Windows version of the program uses the Visual Basic 3.0
runtime DLL. Put the program diskette in drive A. From
the Microsoft Windows Program Manager, choose RUN from the
FILE menu and type: A:\\SETUP or double-click on the SETUP.EXE
file in drive A. Setup will copy the program to directory
C:\\ORIFICE unless you make your own choice. If you want the
program-icon to appear in another group window, move it to
where you want 'ISO' to be and delete the window group
made by Setup. Save your selections.
\BSTEP 2:\b Start the program by typing "ISO" from the DOS-prompt,
or 'click' on the correct icon:
FLOW -ORIFICE
FLOW-ORIFICE CALCULATION PROGRAM
International Standard ISO 5167-1:1991
-------------------------------------------------------------------
Copyright (C) 1996 by B. K. Berge (Version 4.0)
The Disclaimer is shown before the main menu appears:
Gas Orifice
Liquid Orifice
Restriction Orifice - Gas
Restriction Orifice - Liquid
EXIT
\BSTEP 3:\b Calculation Options:
After choosing type and method of calculation the input-screen
will appear. For gas-calculations you have to enter specific
gas gravity, temperature and pressure. You can also give
molefractions of N2, CO2 and H2S for sour gas calculations.
The AGA-8 equation is used for calculating Z-factor
(compressibility factor) for natural gases. The equation is
complex, and calculation time may be long depending on your
computer-type. The Redlich-Kwong equation of state is used
for air and nitrogen.
For oil-calculations you have to enter specific oil gravity,
temperature and pressure. It is also recommended to give
molecular weight of oil. For water-calculations the input
requirements are salinity, temperature, and pressure.
NOTE: It is assumed that all dissolved solids for water are
expressed as equivalent sodium chloride concentration. The
results are an orifice specification sheet giving the necessary
data for design of an orifice or evaluating an existing orifice.
\BSTEP 4:\b Interpreting the results:
The results will contain a few factors that you should know:
\UISO 5167-1:1991\u
The basic flow equation is:
Qm = C*E*Eps*Pi/4*OD^2*Sqrt(2*dP*Roh)
where
Qm = Mass flow rate (kg/s)
C = Discharge coefficient = Alpha/E
E = Velocity of approach factor = 1/(Sqrt(1-Beta^4))
Eps = Expansion factor due to pressure drop
Pi = 3.14159
OD = Orifice diameter at actual flowing conditions
dP = Differential pressure across orifice
Roh = Density of flowing fluid measured at upstream tap
The flow coefficient is given above as:
Alpha = C * E
and the orifice to pipe diameter is:
Beta = OD/PID
The definition of the factors are given in Ref. 1.