Selecting Cycle and Design Parameters of a Super Critical CO<sub>2</sub> Cycle for a 180 kW Biogas Engine
Jarosław Milewski,
Arkadiusz Szczęśniak,
Piotr Lis,
Łukasz Szabłowski,
Olaf Dybiński,
Kamil Futyma,
Arkadiusz Sieńko,
Artur Olszewski,
Tomasz Sęk,
Władysław Kryłłowicz
Affiliations
Jarosław Milewski
Institute of Heat Engineering, Faculty of Power and Aeronautical Engineering, Warsaw University of Technology, 21/25 Nowowiejska Street, 00-660 Warsaw, Poland
Arkadiusz Szczęśniak
Institute of Heat Engineering, Faculty of Power and Aeronautical Engineering, Warsaw University of Technology, 21/25 Nowowiejska Street, 00-660 Warsaw, Poland
Piotr Lis
Institute of Heat Engineering, Faculty of Power and Aeronautical Engineering, Warsaw University of Technology, 21/25 Nowowiejska Street, 00-660 Warsaw, Poland
Łukasz Szabłowski
Institute of Heat Engineering, Faculty of Power and Aeronautical Engineering, Warsaw University of Technology, 21/25 Nowowiejska Street, 00-660 Warsaw, Poland
Olaf Dybiński
Institute of Heat Engineering, Faculty of Power and Aeronautical Engineering, Warsaw University of Technology, 21/25 Nowowiejska Street, 00-660 Warsaw, Poland
Kamil Futyma
Institute of Heat Engineering, Faculty of Power and Aeronautical Engineering, Warsaw University of Technology, 21/25 Nowowiejska Street, 00-660 Warsaw, Poland
Arkadiusz Sieńko
Energia 3000 Ltd., 6/32 Warszawska Street, 15-063 Bialystok, Poland
Artur Olszewski
Energia 3000 Ltd., 6/32 Warszawska Street, 15-063 Bialystok, Poland
Tomasz Sęk
Energia 3000 Ltd., 6/32 Warszawska Street, 15-063 Bialystok, Poland
Władysław Kryłłowicz
Institute of Heat Engineering, Faculty of Power and Aeronautical Engineering, Warsaw University of Technology, 21/25 Nowowiejska Street, 00-660 Warsaw, Poland
The objective of this paper was to study the sCO2 cycle as a waste heat recovery system for a 180 kW biogas engine. The research methodology adopted was numerical simulations through two models built in different programs: Aspen HYSYS and GT Suite. The models were used to optimize the design and thermodynamic parameters of a CO2 cycle in terms of system power, system efficiency, expander, and compressor efficiency. Depending on the objective function, the sCO2 cycle could provide additional power ranging from 27.9 to 11.3 kW. Based on the calculation performed, “Recuperated cycle at maximum power” was selected for further investigation. The off-design analysis of the system revealed the optimum operating point. The authors designed the preliminary dimensions of the turbomachinery, i.e., the rotor dimension is 16 mm, which will rotate at 100,000 rpm.
