Integration of phase change materials into the thermal management of electric systems

This experimental study explores the integration of a bio-based Phase Change Material (PCM), Crodatherm 29, into a 100×100×15 mm aluminium pin- fin heat sink for thermal management of electronic systems. The PCM, with a melting point of 29 °C, was selected for its high latent heat, biodegradability, and non-toxic properties. Tests conducted at power levels of 20, 40, and 60 W and airflow rates of 75–125 m³/h revealed the material’s effective thermal buffering behaviour, particularly at 40 W, where the heater temperature remained below 50 °C for over 25 minutes. The system exhibited classic three-phase thermal behaviour, confirming efficient energy absorption during phase transition. Increasing airflow had a negligible effect (<2 K), highlighting that thermal regulation was predominantly governed by latent heat storage. At higher power (60 W), PCM melting was rapid, limiting its buffering duration. These findings suggest that PCM-enhanced passive cooling systems offer a viable solution for managing transient thermal loads in electronics, provided that material quantity and application conditions are carefully optimized.