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Content available The methodology of the gas turbine efficiency calculation
Kotowicz J., Job M., Brzęczek M., Nawrat K., Mędrych J.
Archives of Thermodynamics
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2016
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Vol. 37, no. 4
19--35
EN
In the paper a calculation methodology of isentropic efficiency of a compressor and turbine in a gas turbine installation on the basis of polytropic efficiency characteristics is presented. A gas turbine model is developed into software for power plant simulation. There are shown the calculation algorithms based on iterative model for isentropic efficiency of the compressor and for isentropic efficiency of the turbine based on the turbine inlet temperature. The isentropic efficiency characteristics of the compressor and the turbine are developed by means of the above mentioned algorithms. The gas turbine development for the high compressor ratios was the main driving force for this analysis. The obtained gas turbine electric efficiency characteristics show that an increase of pressure ratio above 50 is not justified due to the slight increase in the efficiency with a significant increase of turbine inlet combustor outlet and temperature.
2
Content available remote Assessment of the effects of the operation of power unitson sliding-pressure
Kosman G., Łukowicz H., Nawrat K., Kosman W.
Eksploatacja i Niezawodność
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2007
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nr 3
44-48
EN
In the article the results of an analysis of the performance of a unit operated with incomplete sliding-pressure and with full sliding-pressure adjusted each time to a specific load are shown. The article also presents the gain obtained from the use of full sliding-pressure resulting from the reduction of thermodynamic loss in the system and the reduction of the unit's own needs. The measurements of the condensation-heating turbo set operated with incomplete sliding-pressure was used in the analysis.
3
Content available remote Operation decision support regarding componebts of steam turbines wear in steady state
Kosman G., Nawrat K., Kosman W.
Transactions of the Institute of Fluid-Flow Machinery
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2003
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nr 113
235-247
EN
This paper discussed chosen operation and diagnostic problems with steam turbines in steady states. Wear rate monitoring is the main goal. The material creep affects components wear under heat load in steady state. The paper presents the methodology of comprehensive diagnostic information development, which supports operation, repair and modernization decision. An example is shown of such a support based on operation decision making in order to decrease its components wear rate.
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