Influence of gas turbine unit working medium properties on combined cycle thermodynamic effectiveness
The use of different fuels in the gas-turbine unit alters the combustion products composition, in particular the ratio between the amounts of diatomic and triatomic gases. In turn this fact leads to a change in heat capacity, adiabatic index and specific costs of working medium compression and expan...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | Russian |
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Tomsk Polytechnic University
2019-05-01
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| Series: | Известия Томского политехнического университета: Инжиниринг георесурсов |
| Subjects: | |
| Online Access: | http://izvestiya-tpu.ru/archive/article/view/1461 |
| _version_ | 1797812517935775744 |
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| author | Viktor Belousov Tatyana Bogatova Alexander Ryzhkov Sergey Gordeev Irina Amarskaya |
| author_facet | Viktor Belousov Tatyana Bogatova Alexander Ryzhkov Sergey Gordeev Irina Amarskaya |
| author_sort | Viktor Belousov |
| collection | DOAJ |
| description | The use of different fuels in the gas-turbine unit alters the combustion products composition, in particular the ratio between the amounts of diatomic and triatomic gases. In turn this fact leads to a change in heat capacity, adiabatic index and specific costs of working medium compression and expansion and the recovery boiler thermal capacity. The article analyzes the impact of working medium properties changes with different fuels - methane, carbon monoxide and hydrogen, which leads to different triatomic gases content in the combustion products. We also consider the costs and the working fluid properties changes, with additional cyclic air heating before the combustion chamber of gas turbine unit. The purpose of this paper is a comparative analysis of the gas turbines cycle thermodynamic efficiency with different contents of triatomic gases in the combustion products, the amount of which depends on the used fuel properties, as well as on additional cyclic air heating before the combustion chamber. The studies were performed by the calculation method with the model, which takes into account the dependence of the specific heats and the performance adiabatic compression of air and fuel in the compressor and the expansion of the combustion products in the turbine on temperature. Besides there is an additional air heating in the air heater, but the air flow after the compressor for the first turbine stage cooling is not included. Found that the air pre-heating in the air heater decreases the thermal efficiency of the combined cycle power plant, regardless of the usage pattern of the air heater flue gas. Moreover, the exhaust gases use for heating the combustion air of air heater increases cost and capacity of the air compressor and the turbine, but not as much impact on efficiency CCP reducing as flue gas heat input to the working fluid of steam turbine cycle. |
| first_indexed | 2024-03-13T07:38:39Z |
| format | Article |
| id | doaj.art-714835503893486aaf0ef21cf4003f15 |
| institution | Directory Open Access Journal |
| issn | 2500-1019 2413-1830 |
| language | Russian |
| last_indexed | 2024-03-13T07:38:39Z |
| publishDate | 2019-05-01 |
| publisher | Tomsk Polytechnic University |
| record_format | Article |
| series | Известия Томского политехнического университета: Инжиниринг георесурсов |
| spelling | doaj.art-714835503893486aaf0ef21cf4003f152023-06-03T21:07:58ZrusTomsk Polytechnic UniversityИзвестия Томского политехнического университета: Инжиниринг георесурсов2500-10192413-18302019-05-013254Influence of gas turbine unit working medium properties on combined cycle thermodynamic effectivenessViktor BelousovTatyana BogatovaAlexander RyzhkovSergey GordeevIrina AmarskayaThe use of different fuels in the gas-turbine unit alters the combustion products composition, in particular the ratio between the amounts of diatomic and triatomic gases. In turn this fact leads to a change in heat capacity, adiabatic index and specific costs of working medium compression and expansion and the recovery boiler thermal capacity. The article analyzes the impact of working medium properties changes with different fuels - methane, carbon monoxide and hydrogen, which leads to different triatomic gases content in the combustion products. We also consider the costs and the working fluid properties changes, with additional cyclic air heating before the combustion chamber of gas turbine unit. The purpose of this paper is a comparative analysis of the gas turbines cycle thermodynamic efficiency with different contents of triatomic gases in the combustion products, the amount of which depends on the used fuel properties, as well as on additional cyclic air heating before the combustion chamber. The studies were performed by the calculation method with the model, which takes into account the dependence of the specific heats and the performance adiabatic compression of air and fuel in the compressor and the expansion of the combustion products in the turbine on temperature. Besides there is an additional air heating in the air heater, but the air flow after the compressor for the first turbine stage cooling is not included. Found that the air pre-heating in the air heater decreases the thermal efficiency of the combined cycle power plant, regardless of the usage pattern of the air heater flue gas. Moreover, the exhaust gases use for heating the combustion air of air heater increases cost and capacity of the air compressor and the turbine, but not as much impact on efficiency CCP reducing as flue gas heat input to the working fluid of steam turbine cycle.http://izvestiya-tpu.ru/archive/article/view/1461combined-cycle plantcompressorturbineadiabatic indexspecific consumptiontriatomic gas |
| spellingShingle | Viktor Belousov Tatyana Bogatova Alexander Ryzhkov Sergey Gordeev Irina Amarskaya Influence of gas turbine unit working medium properties on combined cycle thermodynamic effectiveness Известия Томского политехнического университета: Инжиниринг георесурсов combined-cycle plant compressor turbine adiabatic index specific consumption triatomic gas |
| title | Influence of gas turbine unit working medium properties on combined cycle thermodynamic effectiveness |
| title_full | Influence of gas turbine unit working medium properties on combined cycle thermodynamic effectiveness |
| title_fullStr | Influence of gas turbine unit working medium properties on combined cycle thermodynamic effectiveness |
| title_full_unstemmed | Influence of gas turbine unit working medium properties on combined cycle thermodynamic effectiveness |
| title_short | Influence of gas turbine unit working medium properties on combined cycle thermodynamic effectiveness |
| title_sort | influence of gas turbine unit working medium properties on combined cycle thermodynamic effectiveness |
| topic | combined-cycle plant compressor turbine adiabatic index specific consumption triatomic gas |
| url | http://izvestiya-tpu.ru/archive/article/view/1461 |
| work_keys_str_mv | AT viktorbelousov influenceofgasturbineunitworkingmediumpropertiesoncombinedcyclethermodynamiceffectiveness AT tatyanabogatova influenceofgasturbineunitworkingmediumpropertiesoncombinedcyclethermodynamiceffectiveness AT alexanderryzhkov influenceofgasturbineunitworkingmediumpropertiesoncombinedcyclethermodynamiceffectiveness AT sergeygordeev influenceofgasturbineunitworkingmediumpropertiesoncombinedcyclethermodynamiceffectiveness AT irinaamarskaya influenceofgasturbineunitworkingmediumpropertiesoncombinedcyclethermodynamiceffectiveness |