Abstract
Abstract This paper provides theoretical predictions on the thermodynamic analysis of a low-temperature differential (LTD) Stirling engine. A twin power piston, gamma-configuration, LTD Stirling engine is considered with a heat source temperature of 353 K and heat sink temperature of 307 K. Second-order thermodynamic models are performed with MATLAB software. The geometrical parameters investigated include the power piston stroke, the displacer stroke, the displacer diameter, and the displacer thickness. Results from this study indicate that the indicated power density is achieved at a fixed 4 RPM engine. This engine has geometrical parameters with a power piston stroke of 0.29 m, displacer stroke of 0.21 m, displacer diameter of 1.44 m, and displacer thickness of 0.26 m. Additionally, the effects of the heat sink temperature on the indicated power output is performed and analyzed. The result shows that the indicated power output increased with a decreasing heat sink temperature.
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