Selecting Cycle and Design Parameters of a Super Critical CO 2 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 and Władysław Kryłłowicz
Additional contact information
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

Energies, 2024, vol. 17, issue 12, 1-21

Abstract: The objective of this paper was to study the sCO 2 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 CO 2 cycle in terms of system power, system efficiency, expander, and compressor efficiency. Depending on the objective function, the sCO 2 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.

Keywords: sCO 2; WHR; mathematical modeling; waste heat utilization (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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