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Analysis of fouling thermal resistance of feed-water heaters in steam power plants

Abstract

In this paper a problem is discussed of thermal degradation of shell-and-tube recuperative feed-water heaters due to heat transfer surface fouling. Application (to an example steam cycle of power plant) of DIAGAR software system intended for the analysing of impact of degradation of a particular heat exchanger on whole recuperative system performance, is presented. On the basis of the systematically performed simulative calculations it was concluded that the degradation of feed-water heaters of the lowest extraction pressure results in an additional load imposed on the heaters of higher extraction pressures, moreover it was estimated that the degradation of the heaters due to presence of sediments of the thermal resistance reaching 5*10-4 m2*K/W, has resulted in the drop of turbine set efficiency by about 0.3%. Such drop depends on a given configuration of degree of degradation of particular feed-water heaters applied in a considered turbine set.

Keywords:

steam power unit, fouling, feedwater heaters

Details

Issue
Vol. 16 No. S1 (2009)
Section
Latest Articles
Published
16-06-2010
DOI:
https://doi.org/10.2478/v10012-008-0037-1
Licencja:
Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Open Access License

This journal provides immediate open access to its content under the Creative Commons BY 4.0 license. Authors who publish with this journal retain all copyrights and agree to the terms of the CC BY 4.0 license.

 

Authors

  • Dariusz Butrymowicz

  • Jerzy Głuch

  • Tomasz Hajduk

  • Marian Trela

  • Andrzej Gardzilewicz

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