Open Access Open Access  Restricted Access Subscription Access

Exergy Analysis of the Revolving Vane Compressed Air Engine


Affiliations
1 Department of Industrial and Systems Engineering, Krida Wacana Christian University, Jalan Tanjung Duren Raya No. 4, Jakarta Barat 11470, Indonesia
2 School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore
3 Technical University of Munich-Campus for Research Excellence and Technological Enterprise (TUM CREATE), 1 CREATEWay No. 10-02, CREATE Tower, 138602, Singapore
 

Exergy analysis was applied to a revolving vane compressed air engine. The engine had a swept volume of 30 cm3. At the benchmark conditions, the suction pressure was 8 bar, the discharge pressure was 1 bar, and the operating speed was 3,000 rev⋅min−1. It was found that the engine had a second-law efficiency of 29.6% at the benchmark conditions. The contributors of exergy loss were friction (49%), throttling (38%), heat transfer (12%), and fluid mixing (1%). A parametric study was also conducted. The parameters to be examined were suction reservoir pressure (4 to 12 bar), operating speed (2,400 to 3,600 rev⋅min−1), and rotational cylinder inertia (0.94 to 2.81 g⋅mm2). The study found that a higher suction reservoir pressure initially increased the second-law efficiency but then plateaued at about 30%. With a higher operating speed and a higher cylinder inertia, second-law efficiency decreased. As compared to suction pressure and operating speed, cylinder inertia is the most practical and significant to be modified.
User
Notifications
Font Size

Abstract Views: 68

PDF Views: 0




  • Exergy Analysis of the Revolving Vane Compressed Air Engine

Abstract Views: 68  |  PDF Views: 0

Authors

Alison Subiantoro
Department of Industrial and Systems Engineering, Krida Wacana Christian University, Jalan Tanjung Duren Raya No. 4, Jakarta Barat 11470, Indonesia
Kin Keong Wong
School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore
Kim Tiow Ooi
Technical University of Munich-Campus for Research Excellence and Technological Enterprise (TUM CREATE), 1 CREATEWay No. 10-02, CREATE Tower, 138602, Singapore

Abstract


Exergy analysis was applied to a revolving vane compressed air engine. The engine had a swept volume of 30 cm3. At the benchmark conditions, the suction pressure was 8 bar, the discharge pressure was 1 bar, and the operating speed was 3,000 rev⋅min−1. It was found that the engine had a second-law efficiency of 29.6% at the benchmark conditions. The contributors of exergy loss were friction (49%), throttling (38%), heat transfer (12%), and fluid mixing (1%). A parametric study was also conducted. The parameters to be examined were suction reservoir pressure (4 to 12 bar), operating speed (2,400 to 3,600 rev⋅min−1), and rotational cylinder inertia (0.94 to 2.81 g⋅mm2). The study found that a higher suction reservoir pressure initially increased the second-law efficiency but then plateaued at about 30%. With a higher operating speed and a higher cylinder inertia, second-law efficiency decreased. As compared to suction pressure and operating speed, cylinder inertia is the most practical and significant to be modified.