Babak Hadidi - Department of Mechanical Engineering, Faculty of Engineering, Razi University, Kermanshah, Iran
Farzad Veysi - Department of Mechanical Engineering, Faculty of Engineering, Razi University, Kermanshah, Iran

Thermal management systems using phase change materials (PCMs) can improve heat absorption and increase safe operating times. However, limited research has explored combining multiple PCMs within a system. This study investigates the thermal performance of a two-dimensional heat sink with varied PCM configurations. Simulations tested RT-۵۴, CaCl۲.۶H۲O, and n-Eicosane arranged in different ways at ۵ W and ۷.۵ W. Key results show CaCl۲.۶H۲O with n-Eicosane increased the time to reach ۴۰°C by ۱۸۶% compared to CaCl۲.۶H۲O alone at ۵ W. Pairing CaCl۲.۶H۲O and RT-۵۴ improved time to ۴۰°C by ۴۲۵%. Increased power amplified these effects. The density and latent heat fusion of PCMs were critical factors. This demonstrates combining certain PCMs extends safe operating times more than using a single material. These optimal configurations can guide thermal management system design for electronics and other applications.

Thermal management, heat sink, Phase Change Material, numerical simulation