EBSILON®Professional Online Documentation
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Line connections |
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1 |
Heat supply of boiler (with injection water) |
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2 |
Heat supply Reheater 1 (with injection water) |
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3 |
Heat supply Reheater 2 (with injection water) |
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4 |
Heat supply of blow-down water |
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5 |
Supplied heat fuel (incl. Hu) |
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6 |
Supplied heat air |
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7 |
Vaporizer steam |
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8 |
Other supplied energy flows |
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9 |
Loss in exhaust gas line 1 |
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10 |
Loss in exhaust gas line 2 |
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11 |
Loss in slag line 1 |
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12 |
Useful heat (Nominal) |
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13 |
Boiler efficiency |
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General User Input Values Characteristic Lines Physics Used Displays Example
Component 87 serves for balancing a boiler in accordance with DIN EN 12952-15 chapter 8.4.
According to the regulation, it is required to convert enthalpies to reference temperatures and to consider the calorific values of unburnt fractions in the exhaust gas. This is possible only if the logical outlets 5 to 11 from this component are connected directly to the corresponding pipes with the material data. If other logical components (like a summarizer) are inserted between the port of this component and the material line, this does not work any more. In this case, the amount of heat is taken directly (without conversion and consideration of the calorific value) and a warning is issued.
The calculated efficiency is also output on a logic line and is thus accessible for validation.
For the calculation of exhaust gas losses the heating value of the exhaust gas (due to unburnt fuel) was calculated from the composition. As of Patch 11.01 it is taken from the pipe. This increases the consistency of the results.
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TR |
Reference temperature for efficiency calculation |
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QZ |
Other supplied heats |
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FQNN |
Mode for useful heat input Like in Parent Profile (Sub Profile option only) Expression =1: Useful heat given from outside =2: Useful heat via QNN |
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QNN |
Boiler useful heat (nominal) |
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FFUEL |
Type of heating Like in Parent Profile (Sub Profile option only) Expression =1: Brown coal =2: Hard coal =3: Fuel oil, natural gas |
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FSPEC |
Calculation method Like in Parent Profile (Sub Profile option only) Expression =1: Direct method =2: Indirect method |
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
No characteristic lines
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All cases
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----------------------------------------------------------------------- QNUTZ ----------------------------------------------------------------------- QNUTZGES = Q(1)+Q(2)+Q(3)+Q(4) ----------------------------------------------------------------------- SUPPLIED HEATS ----------------------------------------------------------------------- Conversion of HEAT VALUE 5 to TR (HU5(TR)) QZUGES = M5*(H5(T5)-H5(TR)+HU5(TR) + M6*(H6(T6)-H6(TR)) + M7*(H7(T7,P7)-H6(TR,p=.01)) + M8*H8 + QZ ----------------------------------------------------------------------- LOSSES ----------------------------------------------------------------------- Determination of HEAT VALUE 9 and conversion to TR (HU9(TR)) Determination of HEAT VALUE 10 and conversion to TR (HU10(TR)) Determination of HEAT VALUE 11 and conversion to TR (HU11(TR)) Radiation loss IF (FFUEL .EQ. 1) FAC = .0315D0 ELSEIF (FFUEL .EQ. 2) FAC = .0220D0 ELSEIF( FFUEL .EQ. 3) FAC = .0113D0 ENDIF FULL LOAD IF (FQNN .EQ.1) QN = QX(12) ELSEIF (FQNN .EQ. 2) QN = QNN ELSEIF (FQNN.EQ. 3) QN = QNUTZGES ENDIF QUV_ST = FAK * (QN/1.0D3)**0.7D0*1.D3 PART-LOAD QUV_ST = FAK * (QNN/1.0D3+1.0D-10)**0.7D0*1.D3 LOAD END QVERLGES = M9 * (H9(T9) - H9(TR) + HU9(TR)) + M10 * (H10(T10) - H10(TR) + HU10(TR)) + M11 * (H11(T11) - H11(TR) + HU11(TR)) + QUV_ST ----------------------------------------------------------------------- EFFICIENCY ------------------------------------------------------------------------ IF (FSPEC .EQ. 1) THEN ETA = QNUTZGES/QZUGES ELSEIF (FSPEC .EQ. 2) THEN ETA = QNUTZGES/( QNUTZGES+QVERLGES) ENDIF |
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Display Option 1 |
Click here >> Component 87 Demo << to load an example.
