Component 162: Electric boiler

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Component 162: Electric boiler

Line connections
1	Feed water inlet
2	Steam / Hot Water outlet
3	Electric Line inlet

General User Input Values Characteristic Lines Physics Used Displays Example

General

This component serves to evaporate or to heat up a fluid (water by default) by means of electric energy.

Here the initial state is either saturated steam (FOUT=0) or water with a temperature specified in the specification value T2 (FOUT=1).

Here optionally

the electric power (FSPEC=0) or
the desired steam and hot water production respectively (FSPEC=1) can be specified.

It is also possible to specify both variables (FSPEC=-1). In this case, the outlet state will be calculated.

User Input Values

FMODE	Calculation mode (design / off design)
FSPEC	Specification
FOUT	Outlet state
T2	Outlet temperature
ETAN	Efficiency (nominal)
DP12N	HP pressure drop (nominal)
M1N	Feed water mass flow- (nominal)
V1N	Economizer pressure drop (nominal)

The identification values marked in blue are reference values for off-design mode. These values are referred to for the actual off-design values used in the equations respectively. If these identification values are stream data, then these values are often taken from attached pipes or calculated values.

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

Characteristic Lines

Characteristic 1:Efficiency characteristic ETA/ETAN= f(M1/M1N)

     X-Axis     1        M1/M1N                 1^st point
                  2        M1/M1N                 2^nd point
                    .
                  N        M1/M1N                 last point

     Y-Axis     1        ETA/ETAN                1^st point
                    2        ETA/ETAN                2^nd point
                    .
                    N        ETA/ETAN               last point

Physics Used

Equations

All cases

Component Displays

Form 1

Form 2

Example

Click here >> Component 162 Demo << to load an example.

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