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Analysis of steam turbine operation in cogeneration with extremely low steam flow [Elektronski vir]Strušnik, Dušan ; Kuštrin, Igor ; Avsec, JurijRegulations for the protection of the environment are increasingly inclined to cleaner energy production. Older thermal power plants are forced to adapt to new regulations, which usually requires ... high investment costs. The concept of the ongoing reconstruction of the existing coal-fired combined heat and power plant to comply with new regulations is presented in the paper. In order to rationalize the expenses, the boiler is being replaced by two heat recovery steam generators, which will utilize the exhaust gas heat from two new gas turbines. The high pressure and intermediate pressure steam from the heat recovery steam generators will be fed to the existing extraction condensing steam turbine. The nominal live steam mass flow will be reduced from the current 50 kg/s to just 30 kg/s after the reconstruction. Even more, during periods of low heat demand, only one gas turbine will be in operation. During the low load of a single gas turbine, the live steam mass flow may drop down to 12 kg/s. Dedicated tests of the existing steam turbine were carried out to verify the viability of operation with such an extremely low mass flow. The results show that such an operation is possible but not efficient from a power generation point of view. Besides this, the temperature of steam extractions rises above the permissible limits. Therefore, additional measures like displacement of the extraction points and steam cooling will be required. The novelty and originality of this paper are expressed in the fabricated steam expansion curves of steam turbine cogeneration operation with the extremely low steam flow by real process measurements.Source: 16th SDEWES Conference on Sustainable Development of Energy, Water and Environment Systems [Elektronski vir] : 10 - 15 October 2021, Dubrovnik, Croatia (F. 1-14)Type of material - conference contributionPublish date - 2021Language - englishCOBISS.SI-ID - 82288899
Author
Strušnik, Dušan |
Kuštrin, Igor |
Avsec, Jurij
Topics
kogeneracija |
masni pretok |
učinkovitost |
plinske turbine |
cogeneration |
efficiency |
extremely low mass flow |
extraction |
flow |
steam parameters |
gas turbines
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Strušnik, Dušan | 40583 |
Kuštrin, Igor | 06784 |
Avsec, Jurij | 10827 |
Source: Personal bibliographies
and: SICRIS
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