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1
Content available remote Gas turbine selection for hot windbox repowering on 200 MW fossil fuel power plant
Harutyunyan Artur, Badyda Krzysztof, Wołowicz Marcin, Milewski Jarosław
Journal of Power Technologies
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2019
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Vol. 99, nr 2
142--151
EN
This paper focuses on and discusses the concept of hot windbox repowering in an existing steam cycle power plant. Using commercial software, for that process based on the fraction of oxygen in exhaust gases, nine different models of gas turbines were tested in power plant model with a fossil fuel boiler. Then thermodynamic analysis of the power plant model before and after hot windbox repowering was conducted. This work seeks to select the best fit gas turbine for hot windbox repowering for a 200 MW fossil fuel power plant and to gain a deeper understanding of the effect of hot windbox repowering. To this end nine models of gas turbines with different net electrical power (from 50 to 125 MW) were tested and General Electric production GE Energy Oil&Gas MS9001E SC (GTW 2009) 123 MW gas turbine was selected as the most suitable for the model of the power plant and, after repowering, the total power of the power plant rose to 398 MW. Calculations were performed in 2 stages: 1) calculation and comparison of the thermodynamic parameters as well as carbon dioxide emissions of power plant model before and after repowering with nine different gas turbines, 2) calculation of thermodynamic parameters of the combined cycle power plant model before and after repowering in values 100%, 90%, 80%, 70%, 60% of fossil fuel boiler heat loads.
2
Analyzing of thermodynamic parameters of 300 MW power plant in four different methods of repowering using GateCycle software
Harutyunyan A., Badyda K., Wołowicz M.
Rynek Energii
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2017
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Nr 5
87--97
EN
In this presented paper the concept of repowering in existing steam cycle power plant was discussed. Mentioned 300 MW steam cycle power plant is located on 1724 m above sea level and equipped with once-trough steam boiler with supercritical parameters and powered by natural gas. Using commercial software, four different repowering methods has been simulated on that power plant. There were feed water heating repowering method, hot windbox repowering method, parallel hot windbox repowering method and complete repowering method with maximum supplementary firing. Then thermodynamic analysis of power plant model before and after each repowering method has been investigated. To that end three different gas turbines has been used: Siemens V84.2, ABB GT11N2 and Alstom GT13E2 types. To analyze the models, calculations were performed with two stages: 1) calculation and analyzes of thermodynamic parameters as well as carbon dioxide (CO2) emissions of the power plant model in mentioned above cases. 2) Calculations of thermodynamic parameters in values 100, 90, 80, 70, 60 and 50 % of the power plant net cycle power in the different cases to show the advantage of different repowering methods behavior in part loads.
PL
W artykule została przedstawiona koncepcja modernizacji istniejącego układu siłowni parowej. Siłownia ta zlokalizowana jest na wysokości 1724 m nad poziomem morza. Siłownia generuje moc 300 MW, wyposażona jest w kocioł przepływowy na parametry nadkrytyczne i zasilana jest gazem ziemnym. Wykorzystując komercyjne środowisko numeryczne została przeprowadzona symulacja czterech wariantów modernizacji siłowni. Poszczególne warianty to podgrzew wody zasilającej, metoda „hot windbox”, metoda „parallel hot windbox” oraz zastąpienie kotła gazowego turbiną gazową. Została wykonana analiza termodynamiczna przed modernizacją oraz po zastosowaniu każdej z metod. Przeanalizowano zastosowanie trzech różnych turbin gazowych: Siemens V84.2, ABB GT11N2 oraz Alstom GT13E2. W celu przeanalizowania wariantów obliczenia przeprowadzono w dwóch krokach: 1) Obliczenia i analiza termodynamiczna parametrów pracy siłowni oraz emisji dwutlenku węgla dla rozważanych wariantów. 2) Obliczenia parametrów termodynamicznych dla różnego obciążenia układu siłowni, tj. 100, 90, 80, 70, 60 oraz 50% mocy w celu zaprezentowania zachowania różnych metod modernizacji w zakresie obciążeń częściowych.
3
Content available Reconditioning in synchronous operation with one parallel induction generator
Magalhães A. S., Moraes P. H. F., Silva A. H. F., Gomes P. H. G., Alves A. J., Calixto W. P.
Transactions on Environment and Electrical Engineering
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2016
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Vol. 1, No. 4
66--72
EN
The purpose of this paper is to compare mathematical modeling and practical bench in order to validate the electrical interactions between an induction generator and a synchronous generator. Two generators was connected to a common bus in steady state, subject to non-linear load. The results comparing modeling and bench tests show that the induction generator besides the active power increasing, has a better way for harmonic currents flowing in common bus. It was concluded that the induction generator repowering and attenuates current harmonic components present at the connection point, improving the network voltage profile.
4
Repowering - cele, fakty oraz przykłady
Bakoń T.
Czysta Energia
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2016
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Nr 10
32--35
5
Content available remote Parallel feed water heating repowering of a 200 MW steam power plant
Ahmadi G. R., Toghraie D.
Journal of Power Technologies
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2015
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Vol. 95, nr 4
288--301
EN
In this paper, feed water heating repowering of Shahid Montazeri steam power plant has been studied in three different modes. Efficiencies of energy and exergy have been selected as objective functions. Cycle-tempo software was used for simulations. In the first case, a low pressure heat recovery heat exchanger and a EGT-RLM600-PC gas turbine were used. Efficiencies of energy and exergy increase to 3.8% & 3.79% respectively and cooling tower water temperature difference increases to 0.652°C. In the second case, a high pressure heat recovery heat exchanger and a Siemens (KWU) V64.3 gas turbine were used. Efficiencies of energy and exergy increase to 6.68% and 6.65% respectively. In the third case, both heat recovery heat exchangers are and Westinghouse-401 gas turbines were used. Efficiencies of energy and exergy increase to 8.93% & 9.05% respectively. This is the best plan in terms of efficiency and cycle power promotion.
6
Content available remote Gas turbine selection for feedwater repowering
Wołowicz M., Badyda K.
Journal of Power Technologies
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2015
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Vol. 95, nr 4
302--308
EN
The paper presents the concept of using hot exhaust gases from gas turbines with different power output to heat up feedwater in a supercritical power plant unit. The gas turbine is connected to the system, bypassing a high pressure regenerative heat exchanger. The benefits of this solution are discussed and the factors to be taken into account are listed. The criteria to be met by the gas turbine to ensure safe and optimal connection to the steam system are discussed. A reference unit model with 800 MW electric power (an existing super-critical power unit in Poland - Belchatow II) was created and presented in a previous paper by the same authors. This model was later supplemented with a gas turbine (three different models with different levels of power production are taken into consideration). The system with a gas turbine enjoys greater power and efficiency over the steam cycle alone. The power increase is due to the extra power generated by the gas turbine and the higher output of the steam system caused by increasing the steam flow through the turbine (closed extraction to the "bypassed" high-pressure heat exchanger). System power is changed linearly with the steam flow and reaches the nominal point 40..50% higher than without an added gas turbine (depending on gas turbine power and efficiency). The efficiency characteristics of the whole system are flatter, with higher values.
7
Content available remote Comparative thermodynamic analysis of quasi-nonstationary operation of one and two power units with capacity of 370 MW operating in cogeneration
Bartnik R., Buryn Z.
Journal of Power Technologies
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2015
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Vol. 95, spec.
6--13
EN
This paper undertakes a comparison of annual, quasi-nonstationary operation of one and two power units with a capacity of 370 MW operating in cogeneration used to feed heaters connected in a series. The comparison encompasses the thermal parameters of the steam in turbine extractions used to feed the heaters, the potential for achieving district hot water parameters behind the heaters and the energy efficiency of the steam bleed from one and two power units.
8
Repowering w fotowoltaice
Bakoń T., Plikunas E.
Elektro Info
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2015
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nr 12
98--102
PL
W artykule przedstawiono zjawisko repoweringu w fotowoltaice. Zwrócono uwagę na problem zagospodarowania zdemontowanych ogniw fotowoltaicznych. Przedstawiono analizę przykładu repoweringu elektrowni fotowoltaicznej.
EN
This paper presents the repowering phenomenon in photovoltaic sector. Attention was drawn to the problem of dismantled photovoltaic panels. An example analysis of the repowering of photovoltaic power plant is presented.
9
Content available remote The influence of structure of heat recovery steam generator and of gas turbine power repowering power unit 370 MW on its operation - condensing operation of the unit
Bartnik R., Buryn Z., Duczkowska-Kądziel A.
Journal of Energy Science
|
2012
|
Vol. 1, nr 2
7--17
EN
The paper presents results of technical calculations of selection heating structures of heat steam recovery generators and of power of gas turbine for modernization of coal-fired power unit with rated capacity of 370 MW to dual-fuel steam-gas system. Calculations were conducted for condensing operation of the unit.
10
Repowering w energetyce wiatrowej : korzyści i zagrożenia
Bakoń T., Krzemińska A.
Elektro Info
|
2012
|
nr 12
32--36
PL
W artykule przedstawiono zjawisko repoweringu w energetyce wiatrowej. Zwrócono uwagę na problem zagospodarowania zdemontowanych turbin wiatrowych. Analiza repoweringu została zilustrowana odpowiednio dobranymi przykładami.
EN
This paper presents the repowering phenomenon in wind energy sector. Attention was drawn to the problem of dismantled wind turbine. Repowering analysis is illustrated with appropriately selected examples.
11
Nadbudowa bloków parowych o parametrach nadkrytycznych turbinami gazowymi
Kotowicz J.
Rynek Energii
|
2008
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nr 4
45-49
PL
W artykule dokonano klasyfikacji dwupaliwowych układów parowo-gazowych oraz przedstawiono główne cechy charakterystyczne dla poszczególnych rodzajów sprzężeń. Przedstawiono wybrane koncepcje oraz wstępne wyniki badań dla sprzężonego równolegle układu parowo-gazowego zasilanego paliwem stałym i gazowym, którego część parowa pracuje w warunkach nadkrytycznych (30 MPa, 600 oC). Na podstawie wstępnych badań stwierdzono, że sprzężenie nawet małej turbiny gazowej (stosunek mocy 1/10) z układem parowym umożliwia podwyższenie sprawności wytwarzania energii elektrycznej o około 1,5%.
EN
In the paper classification of dual-fuel combined cycles was made. Main marks and characteristics of components of the specific couple structures were contained. Selected conceptions and preliminary research results of parallel-couple combined cycle supplied by hard coal and natural gas, which steam part works in supercritical parameters (30 MPa, 600 oC) are shown. We can state that even small gas turbines (power ratio 1/10) coupled with steam cycles increases efficiency of electricity generation about 1.5% in result.
12
Układy dwupaliwowe sprzężone równolegle
Łyczko J., Remiorz L.
Rynek Energii
|
2005
|
nr 4
52-58
PL
W artykule przedstawiono potencjalne możliwości odbudowy mocy elektrowni zawodowych przez budowę układów parowo gazowych na bazie istniejących bloków parowych zasilanych węglem kamiennym i brunatnym. Zaprezentowano uproszczoną formułę analizy sprawności dla tego typu układów oraz zasygnalizowano problematykę modelowania, optymalizacji i analiz dwupaliwowych układów parowo gazowych sprzężonych równolegle oraz zastosowanie do tego celu różnych metod obliczeniowych. Omówiono główne aspekty ekologiczne, techniczne i ekonomiczne omawianych rozwiązań
EN
This paper shows repowering possibility of existing hard coal and brown coal power plants by building dual-fuel system coupled parallel. Formula for a simple analysis of systems of this type was presented. Computer modelling, analysing and optimising were signalised. The main ecological technical and economic aspects were also presented.
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