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Simulation of large state variations in steam power plants : dynamics of large scale systems

Author: Richard Doležal
Publisher: Berlin ; New York : Springer-Verlag, ©1987.
Series: Lecture notes in engineering, 30.
Edition/Format:   Print book : EnglishView all editions and formats
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It is being successfully employed in the analysis of processes involving large state changes such as start-ups, shut- downs, malfunctions and failures in steam power generating unit, which is a large  Read more...

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Genre/Form: Conference papers and proceedings
Congresses
Additional Physical Format: Online version:
Doležal, Richard.
Simulation of large state variations in steam power plants.
Berlin ; New York : Springer-Verlag, ©1987
(OCoLC)571170073
Document Type: Book
All Authors / Contributors: Richard Doležal
ISBN: 0387180532 9780387180533 3540180532 9783540180531
OCLC Number: 16080621
Description: ix, 110 pages : illustrations ; 25 cm.
Contents: List of Symbols.- I Non-Linear Time-Variant Model.- 1. Introduction.- 1.1 The Purpose of a Power Plant Unit Model.- 1.2 The Current State of the IVD Mathematical Model and its Practical Realisation.- 1.3 Collaboration with Power Utilities.- 1.4 Objectives of Further Research.- 2. The Limitations of Process Simulation Using Linearised, Time-Invariant Differential Equations.- 3. The Dynamic Behaviour of a Two-Flow Heat Exchanger.- 3.1 Heat Balances.- 4. The Algorithm of Analytical Approximation.- 4.1 Forms of Recuperator.- 4.2 The Analytical Approximation.- 4.3 The Solution of the Differential Equations.- 4.3.1 Initial Conditions.- 4.3.2 Boundary Conditions and Time Segmentation.- 4.3.3 Integration of the Equations.- 4.3.4 Determination of GBP with a Two Flow Heat Exchanger.....20.- 4.4 Temperature Net.- 5. Change of the Inlet Temperature in an Unheated Pipe as an Example of a Disturbance on the Hot Water Flow Side.- 5.1 Determination of k.- 5.2 Computed Transient Curves.- 5.3 Comparison with Profos' Model.- 6. The Decoupled Algorithm.- 6.1 Recuperator and Regenerator.- 6.2 Simulation of a Two-Flow Recuperator.- 6.3 The Decoupling of the Heat Balance.- 6.4 Advantages and Drawbacks of the Decoupled Algorithm.- 6.5 The Dynamics of Two Flow Recuperators as an Example of the Decoupled Computation.- 6.5.1 Parallel Flow Arrangement.- 6.5.2 Counter Flow Arrangement.- 6.6 Decoupling in other Heat Exchanger Types.- 6.6.1 Cross-Flow Heat Exchanger.- 6.6.2 Three-Flow Heat Exchanger.- II Non-Linear, Time-Variant Process Models.- 7. Two Flow Heat Exchanger with a One-Phase Compressible Working Medium Flow.- 7.1 Balance Equations.- 7.1.1 The Mass Balance.- 7.1.2 The Momentum Balance.- 7.1.3 The Energy Balance.- 7.1.3.1 Energy Balance of the Mass Flow.- 7.1.3.2 The Heat Balance of the Thick-Walled Tube.- 8. Two-Phase Flow of the Working Medium.- 8.1 Determining the Local State of the Working Medium.- 8.2 Balance Equations with Wet Steam as the Working Medium.- 8.2.1 The Energy Balance.- 8.2.2 Momentum and Mass Balances.- 8.3 The Heat, Mass and Momentum Balances with Generalised Parameters.- 8.4 Flow Charts of the Code of a Simple Heat Exchanger.- 9. The Direction of the Propagation of a Disturbance in a Boiler.- 9.1 The Momentum Balance of a Segment.- 9.2 `Downstream' Iteration of Pressure.- 9.3 `Upstream' Calculation Procedure.- 9.3.1 Nature of the Process.- 9.3.2 The Flow Chart.- 9.3.3 Turbine Emergency Stop.- 10. Model of the Steam Generator and the Power Generating Unit.- 10.1 Processes in the Steam Generator.- 10.2 Segmentation of the Steam Generator Model.- 10.3 Correlation Table for the Boiler.- 10.4 Process Flow Chart.- 10.4.1 Hot Side (Flue Gas Side).- 10.4.2 Cold Side.- 10.4.3 The Simulation Procedure for the Cold Side.- 10.4.4 Control Loops in the Boiler.- 10.4.5 Temperature Differences in Thick-Walled Component Parts.- III Power Generating Unit and Large State Variations.- 11. Power Generating Unit Model.- 11.1 Power Generating Unit Subsystems.- 11.2 Scope of PGU Simulation.- 12. Starting-Up Process Model.- 12.1 The Starting-Up Procedure.- 12.2 Construction of the Process Model.- 12.3 Cold Start Procedure in Detail.- 12.4 Variable Process and System Structures.- 12.5 Optimisation of the Starting-Up Process.- 12.6 Comparison of the Simulation Results with Measurements.- 13. Malfunctions and Failures.- 13.1 The Purpose of Failure Analysis.- 13.2 The Required Size of a Simulation Code.- 13.3 Quantities to be Analysed in Failures.- 13.4 Frequent Large State Variations in the PGU.- 13.5 Failure of Feed-Water Pump.- 13.5.1 Description of the Unit.- 13.5.2 The Failure Development.....97.- 13.5.3 Failure Recognition.- 13.5.4 Optimal Elimination of the Failure.- 13.6 Turbine Emergency Stop.- References.
Series Title: Lecture notes in engineering, 30.
Responsibility: R. Doležal.

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