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Component 109: Selective Splitter for Universal Fluid

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Specifications

Line connections
1	Inlet
2	Outlet
3	Branch with mass flow of selected fractions

 

General       User Input Values       Physics Used       Displays       Example

 

General

This component works analogously to component 52 (selective splitter, with filter). However, as there are about 100 different possible substances in the case of the universal fluid, here the user will have to specify the name of the respective substance and the respective degree of separation.  The possible number of substances to be separated is limited to 10.

Note that only the substances can be separated that are available in the inlet stream. As certain libraries integrate substances in a different way, you have to be aware of the properties of the different libraries. This applies to the following substances:

• Water (some libraries distinguish between liquid, gaseous and bound water, while other libraries simply know water)
• Ammonia (some libraries distinguish between liquid and gaseous ammonia, while other libraries simply know ammonia)
• CO2 (some libraries distinguish between liquid and gaseous CO2, while other libraries simply know CO2)
• Butene (some libraries distinguish between n-butene and iso-butene, while other libraries simply know butene)

It is possible to make a conversion between these substances using the components 100/101 (fluid converter/reconverter) and 105 (library selector).

 

In this component , a mode FM=“phase separation“ has been implemented where a separation between liquid and gaseous fractions is affected. The liquid fractions are output at Outlet 3 and the gaseous fractions at Outlet 2.
However, the phase separation is only possible when using the REFPROP library. Moreover, only one entry in the universal fluid is allowed.

The following should be noted with the separator for universal fluid:

If there is a component 105 (library selector) on an outlet stream, there will be an enthalpy difference due to the different property table that has to be considered in the energy balance. Unfortunately, in the calculation of this table difference the interaction energy was included as well. This was corrected. This results in a change of the outlet temperature, which is correct, however. If it would be possible to perform the separation adiabatic, the elimination of the interaction energy would cause a temperature change. Of course, the resulting temperature must be independent of the selected property libraries. The example file component_109.ebs was extended to illustrate this behaviour.

The heating values of the outlet streams were simply set to the value of the input stream.

If there is a heating value correction, it is considered on stream 2.

 

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User Input Values

 

FM	Mass flow calculation =2: M1 or M3 given =3: M1 or M2 given =-1: M3 and composition given from outside =4: phase separation: M1 given, Pin 2: gaseous fraction, Pin3: liquid fraction
FSPECH	Handling of energy balance =0: T3=T1, T2 from energy balance =1: T1=T2, T3 from energy balance =2: T3=T2=T1 without energy balance consideration -  result value DQ will not be zero =-1: All tempertures given externally - result value DQ will not be zero Note: under normal circumstances outlet temperatures will be equal for all streams. But in case different thermal property sets are used for different outlet streams, or real gas properties are used, an enthalpy change can occur. The energy balance difference caused by the setting that all streams are at equal temperature is reported as result variable DQ.
FADAPT	Flag for using the adaptation polynomial ADAPT/ adaptation function EADAPT =0: Not used and not evaluated =1: Factor to all Jxx =1000: Not used, but ADAPT evaluated as RADAPT (Reduction of the computing time) = -1: EADAPT Factor to all Jxx = -1000: Not used, but EADAPT evaluated as RADAPT (Reduction of the computing time)
EADAPT	Adaptation Function
FSUBST1	First substance to separate
JSUBST1	SUBST1 separation rate
FSUBST2	Second substance to separate
JSUBST2	SUBST2 separation rate
FSUBST3	Third substance to separate
JSUBST3	SUBST3 separation rate
FSUBST4	Fourth substance to separate
JSUBST4	SUBST4 separation rate
FSUBST5	Fith substance to separate
JSUBST5	SUBST5 separation rate
FSUBST6	Sixth substance to separate
JSUBST6	SUBST6 separation rate
FSUBST7	Seventh substance to separate
JSUBST7	SUBST7 separation rate
FSUBST8	Eighth substance to separate
JSUBST8	SUBST8 separation rate
FSUBST9	Ninth substance to separate
JSUBST9	SUBST9 separation rate
FSUBST10	Tenth substance to separate
JSUBST10	SUBST10 separation rate

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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

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Component Displays

Display Option 1

Example

Click here >> Component 109 Demo << to load an example.