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Number of results: 7
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Abstract

“People generally associate my name with the first ever heart transplant in Poland. But I know that if I hadn’t tried to do it, then four, maybe five years later someone else would have. What I am sure of, however, is that no one else in Poland would have started working on developing an artificial heart. Had I not fought to create this device, a few hundred people would not be alive today because we wouldn’t have had ventricular assist devices which saved their lives and wellbeing.” – Zbigniew Religa, famous Polish cardiac surgeon
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Abstract

Ludzie łączą moje nazwisko z pierwszą transplantacją serca w Polsce. Ale wiem, że gdybym ja nie spróbował, to może cztery, a może pięć lat później inni zrobiliby tę operację. Jestem natomiast przekonany, że nikt nie zająłby się tworzeniem polskiego sztucznego serca. Gdybym nie walczył o stworzenie tego urządzenia, dziś kilkaset osób już by nie żyło, bo nie byłoby sztucznych komór, które uratowały im życie i zdrowie. Zbigniew Religa
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Abstract

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.
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