Fluent simulation of a beta Stirling engine for very low temperatures.

Abstract

This research article presents an in-depth study of the ZIFF-1000 Stirling engine, focusing on its simulation through ANSYS-Fluent software. The research initiates with a thorough study of the ZIFF-1000 engine, including its unique design features such as the crankshaft mechanism, simplified geometry, and the regenerator, along with the hot and cold heat exchangers. The work emphasizes the significance of these components in enhancing the engine's efficiency and operational reliability. The main contribution of this study is the advanced simulation of the Stirling engine using ANSYS-Fluent for very low temperatures. This involved intricate processes like the adaptation of the engine's geometry for simulation, meticulous meshing, defining fluid and solid zones, and establishing dynamic meshing and boundary conditions. These simulations aimed to provide a comprehensive understanding of the engine's thermodynamic behavior and performance under various conditions. The research highlights the simulation's capability to accurately predict the engine's performance, particularly focusing on aspects such as heat transfer, fluid flow dynamics, and energy efficiency. The simulation results are meticulously analyzed, providing critical insights into the engine's operational characteristics, such as temperature distribution, pressure fluctuations, and efficiency under different operating scenarios. Moreover, the research discusses the challenges encountered during the simulation process, including the complexities associated with accurately replicating the physical phenomena within the engine and the limitations of the simulation tools. In conclusion, this study not only advances the understanding of Stirling engine simulations but also proposes improvements for future research and practical applications of these engines in various industrial and environmental contexts.