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- Title
Combined Dynamic and Thermodynamic Investigation of a Crank-Shifted Alpha-Type Stirling Engine.
- Authors
Karabulut, Halit; Çınar, Can; Topgül, Tolga; Uysal, Latif Kasım
- Abstract
In this study, a structurally simple alpha-type Stirling engine was proposed, and its combined thermodynamic-dynamic analysis was conducted. A simulation program capable of working as nodal analysis, isothermal nodal analysis, and combined dynamic-thermodynamic nodal analysis was developed. Some performance characteristics of the crank-shifted engine were obtained and compared with those of the rhombic-drive and V-type alpha engines. According to the results, the thermodynamic cycle of the novel engine possesses a perfect heating process at a constant volume. As a result, the specific work generation, power, and thermal efficiency of the crank-shifted engine become higher than those of the other engines despite its lower compression ratio and working fluid pressure. An engine with 11 bar charging pressure, 380 K cooler temperature, 800 K heater temperature, 1.143 L effective swept volume, and 3.6 L total working space volume provides more than 8 kW effective power. While the heater temperature varies from 650 to 950 K, the effective power varies from 3540 W to 13,089 W, and the indicated thermal efficiency varies between 39.87% and 49.89%. Corresponding to a flywheel with a 0.25 m2kg inertia moment of mass, the dimensionless speed fluctuation is determined as 7%.
- Subjects
NODAL analysis; STIRLING engines; THERMODYNAMIC cycles; MOMENTS of inertia; RANKINE cycle; THERMAL efficiency; FLUID pressure
- Publication
Arabian Journal for Science & Engineering (Springer Science & Business Media B.V. ), 2023, Vol 48, Issue 3, p2671
- ISSN
2193-567X
- Publication type
Article
- DOI
10.1007/s13369-022-06980-6