Wszystkie pola: combined-cycle - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Maximisation of Combined Cycle Power Plant Efficiency
Maksymalizacja sprawności elektrowni gazowo-parowych
Autorzy:: Kotowicz, J.
Job, M.
Brzęczek, M.
Powiązania:: https://bibliotekanauki.pl/articles/397508.pdf
Data publikacji:: 2015
Wydawca:: ENERGA
Tematy:: combined cycle power plant
turbine cooling
thermodynamic optimisation
elektrownia gazowo-parowa
chłodzenie turbiny
optymalizacja
Opis:: The paper presents concepts for increasing the efficiency of a modern combined cycle power plant. Improvement of gas turbine performance indicators as well as recovering heat from the air cooling the gas turbine’s flow system enable reaching gross electrical efficiencies of around 65%. Analyses for a wide range of compressor pressure ratios were performed. Operating characteristics were developed for the analysed combined cycle plant, for different types of open air cooling arrangements of the gas turbine’s expander: convective, transpiration and film.
W artykule przedstawiono koncepcje zwiększenia sprawności nowoczesnej elektrowni gazowo-parowej. Poprawa charakterystyk pracy turbiny gazowej oraz wykorzystanie ciepła powietrza chłodzącego układ przepływowy turbiny gazowej pozwalają na osiągnięcie sprawności elektrycznej brutto rzędu 65%. Analizy przeprowadzono w szerokim zakresie stopni sprężania w kompresorze. Sporządzono główne charakterystyki pracy analizowanego układu gazowo-parowego dla różnych typów chłodzenia otwartego powietrzem ekspandera turbiny gazowej: konwekcyjnego, transpiracyjnego oraz błonowego.
Źródło:: Acta Energetica; 2015, 4; 42-53
2300-3022
Pojawia się w:: Acta Energetica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Analysis of operation of the gas turbine in a poligeneration combined cycle
Autorzy:: Bartela, Ł.
Kotowicz, J.
Powiązania:: https://bibliotekanauki.pl/articles/240025.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: integrated gasification combined cycle
gas turbine
natural gas and syngas fuel mixture
thermodynamic analysis
change of load
układy gazowo-parowe zintegrowane ze zgazowaniem węgla
turbina gazowa
mieszanina
gaz ziemny
paliwo
gaz syntetyczny
analiza termodynamiczna
zmiana obciążenia
Opis:: In the paper the results of analysis of an integrated gasification combined cycle IGCC polygeneration system, of which the task is to produce both electricity and synthesis gas, are shown. Assuming the structure of the system and the power rating of a combined cycle, the consumption of the synthesis gas for chemical production makes it necessary to supplement the lack of synthesis gas used for electricity production with the natural gas. As a result a change of the composition of the fuel gas supplied to the gas turbine occurs. In the paper the influence of the change of gas composition on the gas turbine characteristics is shown. In the calculations of the gas turbine the own computational algorithm was used. During the study the influence of the change of composition of gaseous fuel on the characteristic quantities was examined. The calculations were realized for different cases of cooling of the gas turbine expander's blades (constant cooling air mass flow, constant cooling air index, constant temperature of blade material). Subsequently, the influence of the degree of integration of the gas turbine with the air separation unit on the main characteristics was analyzed.
Źródło:: Archives of Thermodynamics; 2013, 34, 4; 137-159
1231-0956
2083-6023
Pojawia się w:: Archives of Thermodynamics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Membrane separation of carbon dioxide in the integrated gasification combined cycle systems
Autorzy:: Kotowicz, J.
Skorek-Osikowska, A.
Janusz-Szymańska, K.
Powiązania:: https://bibliotekanauki.pl/articles/240308.pdf
Data publikacji:: 2010
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: IGCC
separacja membranowa
CCS
membrane separation
Opis:: Integrated gasification combined cycle systems (IGCC) are becoming more popular because of the characteristics, by which they are characterized, including low pollutants emissions, relatively high efficiency of electricity production and the ability to integrate the installation of carbon capture and storage (CCS). Currently, the most frequently used CO2 capture technology in IGCC systems is based on the absorption process. This method causes a significant increase of the internal load and decreases the efficiency of the entire system. It is therefore necessary to look for new methods of carbon dioxide capture. The authors of the present paper propose the use of membrane separation. The paper reviews available membranes for use in IGCC systems, indicates, inter alia, possible places of their implementation in the system and the required operation parameters. Attention is drawn to the most important parameters of membranes (among other selectivity and permeability) influencing the cost and performance of the whole installation. Numerical model of a membrane was used, among others, to analyze the influence of the basic parameters of the selected membranes on the purity and recovery ratio of the obtained permeate, as well as to determine the energetic cost of the use of membranes for the CO2 separation in IGCC systems. The calculations were made within the environment of the commercial package Aspen Plus. For the calculations both, membranes selective for carbon dioxide and membranes selective for hydrogen were used. Properly selected pressure before and after membrane module allowed for minimization of energy input on CCS installation assuring high purity and recovery ratio of separated gas.
Źródło:: Archives of Thermodynamics; 2010, 31, 3; 145-164
1231-0956
2083-6023
Pojawia się w:: Archives of Thermodynamics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Thermodynamic analysis of a new conception of supplementary firing in a combined cycle
Autorzy:: Kotowicz, J.
Bartela, Ł.
Balicki, A.
Powiązania:: https://bibliotekanauki.pl/articles/239969.pdf
Data publikacji:: 2010
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: analiza termodynamiczna
dodatkowe systemy spalania
układ kombinowany
combined cycle
supplementary firing systems
thermodynamic analysis
Opis:: The paper analyzes a new concept of integration of combined cycle with the installation of supplementary firing. The whole system was enclosed by thermodynamic analysis, which consists of a gas-steam unit with triple-pressure heat recovery steam generator. The system uses a determined model of the gas turbine and the assumptions relating to the construction features of steam-water part were made. The proposed conception involves building of supplementary firing installation only on part of the exhaust stream leaving the gas turbine. In the proposed solution superheater was divided into two sections, one of which was located on the exhaust gases leaving the installation of supplementary firing. The paper presents the results of the analyses of which the main aim was to demonstrate the superiority of the new thermodynamic concept of the supplementary firing over the classical one. For this purpose a model of a system was built, in which it was possible to carry out simulations of the gradual transition from a classically understood supplementary firing to the supplementary firing completely modified. For building of a model the GateCycle[TM] software was used.
Źródło:: Archives of Thermodynamics; 2010, 31, 4; 15-24
1231-0956
2083-6023
Pojawia się w:: Archives of Thermodynamics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Air bottoming combined cycle performance analyses by the combined effect of variable parameters
Autorzy:: Khan, Mohammad N
Alzafiri, Dhare
Powiązania:: https://bibliotekanauki.pl/articles/27309845.pdf
Data publikacji:: 2022
Wydawca:: Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:: topping cycle
air bottoming cycle
net power output
thermal efficiency
total exergy
destruction
exergetic efficiency
cykl uzupełniania
cykl opadania powietrza
moc wyjściowa netto
wydajność termiczna
całkowita egzergia
zniszczenie
efektywność egzergetyczna
Opis:: To meet the continuous demand for energy of industrial as well as commercial sectors, researchers focus on increasing the power generating capacity of gas turbine power plants. In this regard, the combined cycle is a better solution in terms of environmental aspects and power generation as compared to a simple gas turbine power plant. The present study is the thermodynamic investigation of five possible air bottoming combined cycles in which the topping cycle is a simple gas turbine cycle, regenerative gas turbine cycle, inter-cool gas turbine cycle, reheat gas turbine cycle, and intercool-reheat gas turbine cycle. The effect of pressure ratio of the topping cycle, the turbine inlet temperature of topping cycle, and ambient temperature on net power output, thermal efficiency, total exergy destruction, and exergetic efficiency of the combined cycle have been analyzed. The ratio of the net power output of the combined cycle to that of the topping cycle is maximal in the case when the topping cycle is a simple gas turbine cycle. The ratio of net power output and the total exergy destruction of the combined cycle to those of the topping cycle decrease with pressure ratio for all the combinations under study except for the case when the topping cycle is the regenerative gas turbine cycle.
Źródło:: Archive of Mechanical Engineering; 2022, LXIX, 3; 497--517
0004-0738
Pojawia się w:: Archive of Mechanical Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Thermodynamic and economic analysis of a gas turbine combined cycle plant with oxy-combustion
Autorzy:: Kotowicz, J.
Job, M.
Powiązania:: https://bibliotekanauki.pl/articles/240636.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: gas turbine combined cycle
oxy-combustion
blok gazowo-parowy
oksyspalanie
Opis:: This paper presents a gas turbine combined cycle plant with oxy-combustion and carbon dioxide capture. A gas turbine part of the unit with the operating parameters is presented. The methodology and results of optimization by the means of a genetic algorithm for the steam parts in three variants of the plant are shown. The variants of the plant differ by the heat recovery steam generator (HRSG) construction: the single-pressure HRSG (1P), the double-pressure HRSG with reheating (2PR), and the triple-pressure HRSG with reheating (3PR). For obtained results in all variants an economic evaluation was performed. The break-even prices of electricity were determined and the sensitivity analysis to the most significant economic factors were performed.
Źródło:: Archives of Thermodynamics; 2013, 34, 4; 215-233
1231-0956
2083-6023
Pojawia się w:: Archives of Thermodynamics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Thermodynamic analysis of a combined cycle power plant located in Jordan: A case study
Autorzy:: Bataineh, Khaled
Khaleel, Bara A.
Powiązania:: https://bibliotekanauki.pl/articles/240565.pdf
Data publikacji:: 2020
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: combined cycle power plant
energy efficiency
exergy efficiency
exergy destruction
exergy losses
Opis:: Efficiency and electrical power output of combined cycle power plants vary according to the ambient conditions. The amount of these variations greatly affects electricity production, fuel consumption, and plant incomes. Obviously, many world countries have a wide range of climatic conditions, which impact the performance of power plants. In this paper, a thermodynamic analysis of an operating power plant located in Jordan is performed with actual operating data acquired from the power plant control unit. The analysis is performed by using first and second laws of thermodynamics. Energy and exergy efficiencies of each component of the power plant system are calculated and the effect of ambient temperature on the components performance is studied. The effects of gas turbine pressure ratio, gas turbine inlet temperature, load and ambient conditions on the combined cycle efficiency, power outputs and exergy destruction are investigated. Energy and exergy efficiencies of the combined cycle power plant are found as 45.29%, and 42.73% respectively when the ambient temperature is 34°C. Furthermore, it is found that the combustion chamber has the largest exergy destruction rate among the system components. The results showed that 73% of the total exergy destruction occurs in the combustion chamber when the ambient temperature is 34°C. Moreover, the results show that the second major exergy loss is in HRSC. The results show that the energy and exergy efficiency of the combined cycle power plant decreases as the ambient temperature increases. According to the calculation results, improvement and modification suggestions are presented.
Źródło:: Archives of Thermodynamics; 2020, 41, 1; 95-123
1231-0956
2083-6023
Pojawia się w:: Archives of Thermodynamics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Stan i perspektywy rozwoju układów gazowo-parowych
Status and developement perspectives of combined cycle plants
Autorzy:: Kotowicz, J.
Powiązania:: https://bibliotekanauki.pl/articles/172928.pdf
Data publikacji:: 2012
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: gaz ziemny
układ gazowo-parowy
elektrownia gazowo-parowa
sprawność energetyczna
natural gas
gas-steam plant
steam-gas power plant
power efficiency
Opis:: W artykule omówiono układy gazowo-parowe opalane gazem ziemnym. Zwrócono uwagę na genezę wysokiej sprawności oraz pokazano wiele innych zalet tych układów. Przedstawiono szereg koncepcji dalszego wzrostu sprawności elektrowni gazowo-parowych, począwszy od zwiększenia temperatury na wlocie do turbiny gazowej, poprzez organizację procesu chłodzenia, aż do sposobów podniesienia sprawności części parowej układu. Scharakteryzowano najnowsze rozwiązanie światowych liderów w produkcji turbin gazowych i układów gazowo-parowych. Przedstawiono różne koncepcje układów kombinowanych z instalacją sekwestracji dwutlenku węgla: układ z absorpcją przy użyciu monoetanoloaminy, układ ze spalaniem tlenowym i koncepcja zaawansowanego zero emisyjnego układu z reaktorem membranowym. Pokazano również sprawność tych koncepcji.
The paper focuses on a natural gas-fired combined cycle plants. Thermodynamic efficiency issues of these plants are discussed. Different concepts of the improvement of this parameter are presented starting from temperature increase at the gas turbine inlet through the cooling system arrangement to the increase of steam cycle efficiency. The latest solutions of world leaders in production of gas turbines and combined cycle plants were characterized. The following concepts of these plants were presented: a plant with an absorption installation with the use of MEA, a plant with oxy-fired combustion chamber and an advanced concept of zero-emission plant with a membrane reactor. The efficiency and CO2 emission of these concepts were presented.
Źródło:: Archiwum Energetyki; 2012, 42, 1; 23-38
0066-684X
Pojawia się w:: Archiwum Energetyki
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Energetic and exergetic analysis of a triple-pressure reheat combined cycle power using different primary movers
Autorzy:: Almutairi, Abdulrahman
Alhajeri, Hamad
Alenezi, Abdulrahman
Powiązania:: https://bibliotekanauki.pl/articles/240192.pdf
Data publikacji:: 2019
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: exergy
aeroderivative
gas turbine
reheat and waste exergy
egzergia
turbina gazowa
Opis:: In this work, actual operating data for Sabiya combined cycle power plant located in Kuwait were used to conduct the performance evaluation based on the energetic and exergetic analysis. The proposed system consist of an advanced gas turbine engines, with two triple pressure reheat heat recovery steam generator, and one steam turbine. Three types of primary movers were selected carefully, in order to cover different types, sizes and technologies. The movers are gas turbine engine frame 9FA, LM6000 and GT26. The proposed models have been developed using specialised software and validated with the manufacturer’s data featuring a high level of compatibility. The performance of a combined cycle power plant was investigated for different operating conditions. The result shows that the highest exergy destruction takes place in 9FA engine due to high irreversibility in combustion chamber because of low-pressure ratio, which causes low inlet temperature of compressed air to the combustion chamber. The 9FA engine also has the highest exergy loss due to high exhaust gases temperature, which is caused high useful work from a steam turbine. The GT26-reheat gas turbine engine constitute the best choose as primary mover due to low waste exergy, which is equal to 43.93% whereas 9FA and LM6000 equal to 47.27% and 45.17%, respectively. LM6000 aeroderivative gas turbine is considered the second best choice but the combined cycle power plant will consist of a large number of engines compared to other industrial gas turbine engine, and that may increase the number of auxiliary equipment, capital and maintenance cost.
Źródło:: Archives of Thermodynamics; 2019, 40, 2; 87-105
1231-0956
2083-6023
Pojawia się w:: Archives of Thermodynamics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Parametric analysis of the efficiency of the combined gas-steam turbine unit of a hybrid cycle for the FPSO vessel
Autorzy:: Serbin, Serhiy
Washchilenko, Nikolay
Dzida, Marek
Kowalski, Jerzy
Powiązania:: https://bibliotekanauki.pl/articles/2033277.pdf
Data publikacji:: 2021
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:: combined-cycle
gas turbine
steam turbine
power plant
Opis:: A thermal diagram of the combined gas‒steam turbine unit of a hybrid cycle, which is an energy complex consisting of a base gas turbine engine with a steam turbine heat recovery circuit and a steam-injected gas turbine operating with overexpansion, is proposed. A mathematical model of a power plant has been developed, taking into consideration the features of thermodynamic processes of simple, binary, and steam-injected gas‒steam cycles. Thermodynamic investigations and optimization of the parameters of a combined installation of a hybrid cycle for the generation of electrical energy have been carried out. Three-dimensional calculations of the combustion chamber of a steam-injected gas turbine were carried out, which confirmed the low emissions of the main toxic components.
Źródło:: Polish Maritime Research; 2021, 4; 122-132
1233-2585
Pojawia się w:: Polish Maritime Research
Dostawca treści:: Biblioteka Nauki

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