| Title: | Off-design flow analysis of cogeneration steam turbine with real process data |
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| Authors: | ID Strušnik, Dušan (Author)
ID Kuštrin, Igor (Author)
ID Avsec, Jurij (Author) |
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| Files: |  Off-design_flow_analysis_Strusnik_2022.pdf (2,18 MB)
MD5: 198414F0F5147A92BE4078AB07213DCD
 https://doiserbia.nb.rs/Article.aspx?ID=0354-98362205107S
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| Language: | English |
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| Work type: | Scientific work |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: | FE - Faculty of Energy Technology
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| Abstract: | This paper presents the concept of reconstruction of the existing coal-fired combined heat and power plant to comply with new European environmental policies. The existing coal-fired boiler will be replaced by two new dual pressure heat recovery steam generators, which will utilize the exhaust gas heat from two new gas turbines. The steam from the heat recovery steam generators will be fed to the existing steam turbine. After the reconstruction, the nominal turbine inlet steam mass-flow of 40 kg/s will be reduced to 30 kg/s. During periods of low heat demand, only one gas turbine and one heat recovery steam generator will be in operation and the live steam mass-flow may drop even to 12 kg/s. Prior to the reconstruction, dedicated tests of the existing steam turbine were carried out using the steam from the existing coal-fired boiler. The goal of the test was to verify the viability of operation with such an extremely low mass-flow. The results of tests show that such operation is possible but inefficient from a power generation point of view. Besides this, the turbine control algorithm needs to be accommodated to this extreme operating regime and additional measures like displacement of the extraction points and steam cooling will be required to control the temperature of the steam extractions. The novelty of this paper is using real prereconstruction process data for the assessment of feasibility and efficiency of the post-reconstruction operation of a combined heat and power turbine. |
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| Keywords: | cogeneration, control valves, exhaust gas, heat recovery, steam turbine |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Submitted for review: | 05.12.2021 |
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| Article acceptance date: | 14.07.2022 |
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| Publication date: | 14.07.2022 |
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| Publisher: | Vinča Institute of Nuclear Science |
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| Year of publishing: | 2022 |
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| Number of pages: | Str. 4107-4117 |
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| Numbering: | Letn. 26, Št. 5B |
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| PID: | 20.500.12556/DKUM-86255  |
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| UDC: | 620.9 |
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| ISSN on article: | 0354-9836 |
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| COBISS.SI-ID: | 127778563 |
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| DOI: | 10.2298/TSCI2205107S |
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| Publication date in DKUM: | 30.10.2023 |
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| Views: | 373 |
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| Downloads: | 34 |
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| Metadata: |    |
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| Categories: | Misc.
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