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Development of a performance-based high pressure feed water heater model for Flownex SE

Feed-water heaters (FWHs) are an integral part of the power plant with respect to the overall heat recovery, and thus its efficiency. While the main purpose of the FWHs is to heat up the feed-water before being sent to the boiler, there are more added advantages owing to the installation of this equ...

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Main Author: Thakaso, Matete
Other Authors: Fuls, Wim
Format: Thesis
Language:English
Published: Department of Mechanical Engineering 2015
Subjects:
Mechanical Engineering
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access_status_str Open Access
author Thakaso, Matete
author2 Fuls, Wim
author_browse Fuls, Wim
Thakaso, Matete
author_facet Fuls, Wim
Thakaso, Matete
author_sort Thakaso, Matete
collection Thesis
description Feed-water heaters (FWHs) are an integral part of the power plant with respect to the overall heat recovery, and thus its efficiency. While the main purpose of the FWHs is to heat up the feed-water before being sent to the boiler, there are more added advantages owing to the installation of this equipment to the power plant such as less heat being removed to the atmosphere at the condenser. This report aims at understanding the different types of FWHs in operation and understanding how heat is transferred from the bled steam into the feed-water, and using the understanding to model a transient FWH. The FWH model is a building block towards building a complete transient power plant model. Process operations are all subject to constraints of some sort. The limitations can be in the form of physical geometry, process parameters or lack of correlations that relate known data. The constraints vary in their complexity, and depending on the type of constraints a different mathematical modelling technique can be applied to implement the FWH model. The grey-box modelling technique was chosen to be the appropriate one for analysis as it captures the dynamics that depend on the first principles and correlations whilst still using the global inlet and outlet properties of the FWH. The FWHs have three zones; de-superheating, condensing and sub-cooling zones. The heat transfer characteristics of the three zones are different, and thus their heat duties with the condensing taking a significant amount of the heat duty.
format Thesis
id oai:open.uct.ac.za:11427/13756
institution University of Cape Town (South Africa)
language eng
last_indexed 2026-06-10T12:32:07.214Z
license_str Not specified — see source repository
provenance_str_mv Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository
publishDate 2015
publishDateRange 2015
publishDateSort 2015
publisher Department of Mechanical Engineering
publisherStr Department of Mechanical Engineering
record_format dspace
source_str UCTD — University of Cape Town Open Access Repository
spelling oai:open.uct.ac.za:11427/13756 Development of a performance-based high pressure feed water heater model for Flownex SE Thakaso, Matete Fuls, Wim Mechanical Engineering Feed-water heaters (FWHs) are an integral part of the power plant with respect to the overall heat recovery, and thus its efficiency. While the main purpose of the FWHs is to heat up the feed-water before being sent to the boiler, there are more added advantages owing to the installation of this equipment to the power plant such as less heat being removed to the atmosphere at the condenser. This report aims at understanding the different types of FWHs in operation and understanding how heat is transferred from the bled steam into the feed-water, and using the understanding to model a transient FWH. The FWH model is a building block towards building a complete transient power plant model. Process operations are all subject to constraints of some sort. The limitations can be in the form of physical geometry, process parameters or lack of correlations that relate known data. The constraints vary in their complexity, and depending on the type of constraints a different mathematical modelling technique can be applied to implement the FWH model. The grey-box modelling technique was chosen to be the appropriate one for analysis as it captures the dynamics that depend on the first principles and correlations whilst still using the global inlet and outlet properties of the FWH. The FWHs have three zones; de-superheating, condensing and sub-cooling zones. The heat transfer characteristics of the three zones are different, and thus their heat duties with the condensing taking a significant amount of the heat duty. 2015-08-15T05:31:22Z 2015-08-15T05:31:22Z 2014 Master Thesis Masters MSc (Eng) http://hdl.handle.net/11427/13756 eng application/pdf Department of Mechanical Engineering Faculty of Engineering and the Built Environment University of Cape Town
spellingShingle Mechanical Engineering
Thakaso, Matete
Development of a performance-based high pressure feed water heater model for Flownex SE
thesis_degree_str Master's
title Development of a performance-based high pressure feed water heater model for Flownex SE
title_full Development of a performance-based high pressure feed water heater model for Flownex SE
title_fullStr Development of a performance-based high pressure feed water heater model for Flownex SE
title_full_unstemmed Development of a performance-based high pressure feed water heater model for Flownex SE
title_short Development of a performance-based high pressure feed water heater model for Flownex SE
title_sort development of a performance based high pressure feed water heater model for flownex se
topic Mechanical Engineering
url http://hdl.handle.net/11427/13756
work_keys_str_mv AT thakasomatete developmentofaperformancebasedhighpressurefeedwaterheatermodelforflownexse

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