engleski

Comparison of open and closed gas turbine cycles

This paper presents an analysis and comparison of a real open and closed cycle gas turbine process. Analysis is performed by using operating parameters of six different working mediums (air, helium, CO 2 , neon, argon, nitrogen). The most notable difference is that a real open cycle process uses air and contains a combustion chamber and its dissipated heat is released into the environment, while a real closed cycle process uses helium, CO 2 , neon, argon and nitrogen while consisting of a heater and a cooler where its heat is dissipated. The air had the lowest required driving turbocompressor power (45816, 6 kW), while the highest was achieved by neon (198855, 27 kW). The air had again the lowest total power developed by the turbine (113768, 1 kW), while the highest turbine total power was also achieved by neon (266807, 32 kW). Neon had the lowest share of effective power in the total turbine power (25, 5%), while the highest share of effective power in the total turbine power was achieved by air (59, 7%). Helium had the lowest mass flow (74, 84 kg/s), while argon had the highest value of mass flow (731, 84 kg/s).

Gas Turbine ; Heat Exchange ; Turbine ; Turbocompressor ; Various Working Mediums

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