Modelling, simulating and optimizing boiler heating surfaces and evaporator circuits

K. Sørensen, T. Condra, Niels Houbak

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearch

Abstract

A model for optimizing the dynamic performance of boiler have been developed. Design variables related to the size of the boiler and its dynamic performance have been defined. The object function to be optimized takes the weight of the boiler and its dynamic capability into account. As constraints for the optimization a dynamic model for the boiler is applied. Furthermore a function for the value of the dynamic performance is included in the model. The dynamic models for simulating boiler performance consists of a model for the flue gas side, a model for the evaporator circuit and a model for the drum. The dynamic model has been developed for the purpose of determining boiler material temperatures and heat transfer from the flue gas side to the water-/steam side in order to simulate the circulation in the evaporator circuit and hereby the water level fluctuations in the drum. The dynamic model has been developed as a Differential-Algebraic-Equation system (DAE) and MATLAB has been applied for the integration of the models. In general MATLAB has proved to be very stable for these DAE systems. Experimental verification has been carried out at a full scale plant equipped with instrumentation to verify heat transfer, circulation in the evaporator circuit and water level fluctuations in the drum.
Original languageEnglish
Title of host publicationSIMS 2003 - 44th Conference on Simulation and Modeling
Number of pages13
Place of PublicationSweden, ISBN 91-631-4716-5.
PublisherMalardalen University
Publication date2003
Publication statusPublished - 2003
Event44th Conference on Simulation and Modeling (SIMS 2003) - Malardalen University, Vesterås, Sweden
Duration: 18 Sep 200319 Sep 2003
Conference number: 44

Conference

Conference44th Conference on Simulation and Modeling (SIMS 2003)
Number44
LocationMalardalen University
CountrySweden
CityVesterås
Period18/09/200319/09/2003

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