Abstract— An alpha type stirling engine of two pistons, two cylinders type is theoretically explained. A graphical model of the engine is developed and then the various cycles of this engine are briefly elaborated. The efficiency is proved to be maximum (50% of its theoretical efficiency unlike other engines). Limitations which doesn’t permit this engine to be used commercially in automotive applications are briefly analyzed and a study to overcome this limitations are made. A transient variation in engine working is explained by the alterations in engine’s components and via the coupling of an venturi based working fluid control system. An extensive parametric study of effects of different operating and geometric parameters has been performed and proved that the engine can be used successfully for commercial applications. Study of an solar powered stirling engine powered through parabolic collectors was explained and various possible industrial heat sources were listed from which the heat can be utilized to run the engine.

Index Terms— Solar stirling engine, Venturi, Working fluid control system, Automotive applications

Cite: D Vinoth Kuma, " Modification of an Alpha Stirling Engine with an Venturi Based Working Fluid Control System to Promote Its Automotive Applications," International Journal of Mechanical Engineering and Robotics Research, Vol. 3, No. 2, pp. 101-113, April 2014.