JAILCD2025-030: Comparison of Solid and Perforated Spiral Fins on Instantaneous Heat Transfer and Convective Intensity of PCM at Different Inclination Angles

Abstract

Perforation and inclination angles are key factors that influence the performance of the heat exchangers. In this study, experiments were conducted on solid and perforated spiral fin heat exchangers (SSHX and PSHX) at five inclination angles. The instantaneous temperatures and heat transfer rates were compared, and the heat transfer intensity of convection flow were calculated. The results show that the inclination angle can significantly influence the phase change process of SSHX and PSHX. The perforation can enhance the internal convection flows of the heat exchangers at all angles, especially for the vertical orientation with a significant melting rate increase, but such heat transfer contributions are diminished as the angle towards the horizontal orientation.