Experimental study on the heat shielding performance of multilayer barriers incorporating PCM and aerogel

This study presents an innovative multilayer barrier design that integrates phase change material (PCM) and aerogel, aimed at enhancing the heat shielding performance of the cabin power station. Several experiments are conducted to examine the effects of combination mode, filling thickness ratio, radiation intensity, radiation distance, PCM physical parameter, and thin film reflectance on the heat shielding performance of the cabin generator. The findings suggest that the optimal heat shielding performance is achieved through the combination of PCM positioned in the upper layer and aerogel situated in the lower layer. The optimal filling thickness ratio for the PCM and the aerogel in the multilayer barrier is 3:2 over 1 h. An increase in radiation intensity will result in a reduction of the effective thermal shielding duration, with the rapid temperature rise on the upper surface occurring at 39 min as the radiation intensity is 612 kW/m 3 . The phase change temperature of PCMs plays a crucial role in determining their thermal performance, especially during the phase transition process. Furthermore, the heat shielding performance is significantly enhanced by affixing a silver film to the inner surface of multilayer barriers. This research contributes to the enhancement of heat shielding efficacy in cabin power stations and demonstrates potential applications in the domains of envelope insulation and energy conservation in buildings. • PCM-aerogel multilayer barrier is proposed for advanced heat shielding. • Temperature rise and upper surface differential during operation are compared. • Heat transfer mechanisms and influencing factors across the barrier are analyzed. • Parametric effects on heat shielding effectiveness are evaluated.