Thermal simulation of stirling cooler in IR system based on Flotherm

Thermal analysis is an important technology for electronics equipment reliability analysis. In recent years, demands of thermal analysis for electromechanical products have been highly increased. In this paper, one electromechanical product, Stirling cooler in IR system, was modeled in thermal analysis software Flotherm used for electronic products. By studying the working principle and physical model of Stirling cooler, heat-affected factors such as inner structure, fluid conduction, heat absorbed and released by the cooler from ambient are analyzed. Approaches to modeling these factors are discussed in this paper, and we achieve the simulation in Flotherm software and verified simulation models by thermal measurement. These modeling methods provide a reference for thermal analysis for electromechanical and other products.