E Filter L2 Detailed

Created Mittwoch 21 Juni 2017

Model for an E-Filter reaction taking a variable separation rate into account.

1. Purpose of Model

Replaceable model to be used in GasVolumes:Volume_Gas_L2_Chem for the detailed simulation of an empirical electrostatic dust filter for flue gas cleaning purposes with a detailed calculation of the separation rate according to [1]

2. Physical Insight

This replaceable model is compatible to models of level of detail L2 according to Brunnemann et al. [2].


3. Limits of Validity


4. Interfaces

The model communicates via outer models and records. Thus its expects to have:

5. Nomenclature

A table referencing the nomenclature in the source code, the descriptions of variables and the "human-readable"

6. Governing Equations

Mass and energy balances are calculated in GasVolumes:Volume_Gas_L2_Chem.

Conservation of Components

The composition is a vector of the component mass fractions. The calculation of the outlet composition depends on the type of mass conservation. If the dynamic mass balance is used, the outlet composition is calculated as follows:

while for static mass balance the following equation is used:

Separation process

The the separated dust mass flow and the flue gas volume flow are calculated according to the current flow direction.

For calculation of the separation rate, the applied electric field force is needed:

The migration velocity referring to [1] is calculated as follows:


with the saturation charge of particles:


and the Cunningham slip correction factor:


and lambda as the mean free path of particles:


The separation rate is calculated with the following equation:


The power consumption is calculated as follows:







7. Remarks for Usage


8. References

[1] C. Riehle: "Basic and Theoretical Operation of ESPs", Springer Verlag, 1997
[2] Johannes Brunnemann and Friedrich Gottelt, Kai Wellner, Ala Renz, André Thüring, Volker Röder, Christoph Hasenbein, Christian Schulze, Gerhard Schmitz, Jörg Eiden: "Status of ClaRaCCS: Modelling and Simulationof Coal-Fired Power Plants with CO2 capture", 9th Modelica Conference, Munich, Germany, 2012

9. Version History