Component 102: Mixer with specified concentration

In This Topic

Component 102: Mixer with specified concentration

Specifications

Line connections
1	Main entry
2	Outlet
3	Mixing stream
4	Controller for concentration

General User Input Values Physics Used Displays Example

General

This component serves to mix two substance flows. Thereby, the mass flow of the admixture adjusts itself in such a way that for a certain substance, a specified concentration (mass fraction) exists in the outlet line. A typical application is the modeling of an air preheater with slippage, where so much air gets on the flue gas side that a certain oxygen concentration arises.

In the component, the set value FSUBST is used to specify which substance is to be set. The specification of the desired outlet concentration happens via a logical connection as enthalpy (e.g. as measured value type FTYP=31 (relative position / fraction)).

FSPECX allows defining on which pins a composition is to be specified. However, this flag can only be used if the material equations are integrated into the equation system.
("Extras" --> "Model options" --> "Simulation" --> "Iteration" -->"Level of integration of material equations" set to "in simulation only")

User Input Values

FSUBST

Substance to be controlled

Like in Parent Profile (Sub Profile option only)

Expression

=0: None

=1: N2

=2: O2

=3: CO2

=4: H2O

=5: SO2

=6: Ar

=7: CO

=8: COS

=9: H2

=10: H2S

=11: CH4

=12: HCl

=13: Ethane

=14: Propane

=15: n-Butane

=16: n-Pentane

=17: n-Hexane

=18: n-Heptane

=19: Acetylene

=20: Benzene

=21: C

=22: H

=23: O

=24: N

=25: S

=26: Cl

=27: Ash

=28: Lime (Ca(OH)2)

=30: H2O(bound)

=31: Ash (gas)

=32: NO

=33: NO2

=34: NH3

=37: Methanol

=38: CaCO3

=39: CaO

=40: CaSO4

=41: MgCO3

=42: MgO

=43:-Ca (ions)

=44: Mg (ions)

=45: n-Octane

=46: n-Nonane

=47: n-Decane

=48: n-Dodecane

=49: Isobutane (2-Methylpropane)

=50: Isopentane (2-methylbutane)

=51: Neopenthane (2,2-dimethylpropane)

=52: Neohexane (2,2-Dimethylbutane)

=53: 2,3 Dimethylbutane

=54: Cyclopentane

=55: Isohexane (2-Methylpentane)

=56: 3-Methylpentane

=57: Methylcyclopentane

=58: Cyclohexane

=59: Methylcyclohexane

=60: Ethylcyclopentane

=61: Ethylcyclohexane

=62: Toluene (Toluol, methylbenzene)

=63: Ethylbenzene

=64: ortho-Xylene (1,2-dimethylbenzene)

=65: cis-Decalin (decahydronaphthalene)

=66: trans-Decalin (decahydronaphthalene)

=67: Ethene (ethylene)

=68: Propene (propylene)

=69: 1-Butene

=70: cis-2-Butene

=71: trans-2-Butene

=72: Isobutene (2-Methylpropene)

=73: 1-Pentene

=74: Propadiene (Allene)

=75: 1,2-Butadiene (methylallene)

=76: 1,3-Butadiene (vinylethylene)

=77: Ethanol

=78: CH3SH (methanethiol, methylmercaptan)

=79: Hydrogen cyanide (prussic acid)

=80: CS2 (carbon disulfide)

=81: Air

=82: Helium

=83: Neon

=84: Krypton

=85: Xenon

=86: Dinitrogen monoxide (laughing gas)

FSPECX

Material-equation handling

Like in Parent Profile (Sub Profile option only)

Expression

=0:   Any given
=1:   Pins 1 and (2 or 3) given
=2:   Pins 2 and (1 or 3) given
=3:   Pins 3 and (1 or 2) given
=12: Pins 1 and 2 given
=23: Pins 2 and 3 given
=13: Pins 1 and 3 given

Generally, all inputs that are visible are required. But, often default values are provided.

For more information on colour of the input fields and their descriptions see Edit Component\Specification values

For more information on design vs. off-design and nominal values see General\Accept Nominal values

Physics Used

Equations

All Conditions

M2 = M1 + M3

P2 = P1

H2*M2 = H1*M1 + H3*M3

T2 = f(P2,H2)

If the exit stream contains wet steam, then X2 = f(P2,H2)

Q2 = Q1 + Q3

NCV2 = (NCV1 * M1 + NCV3 * M3) / M2

Component Displays

Display Option 1

Example

Click here >> Component 102 Demo << to load an example.