Power - Water Header Model

The Water Header simulates feed water and condensate headers by distributing water to the outlets to meet water/condensate demands.
The Water Header's control stream is normally connected to a supply stream, which is adjusted in order for the model to meet the water demands.

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Data Descriptions

Data Unit Description
Set Item Type Native
Equipment Properties MinFlow Mass Flow lbs/hr Minimum control stream flow.
MaxFlow Mass Flow lbs/hr Maximum control stream flow.
ContWarn If checked (True) Controller warnings are issued.
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Equipment Properties

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Example of using equipment

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Method&Equations

The Water Header first tallies the inlet and outlet stream flows and sets the state of each outlet. Outlet pressure is the minimum inlet pressure.
The header is not converged if the relative difference between the inlet and outlet flows is greater than 0.0001.
If the control stream flow is less than the minimum or greater than the maximum flow for the stream the control stream flow is set to the minimum or maximum, the header is flagged as not converged and the model aborts.
If the control stream's flow is in range the header model changes the flow by linear interpolation. Once changed, the header is flagged as not converged, an informative message is issued and the header aborts.

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Warnings

Being a composite item – each component may call its warnings.

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Errors

Being a composite item – each component may call its errors.

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