Phase change materials are effective for storing and releasing energy, but they often struggle with slow heat absorption and release. Researchers at the University Tor Vergata of Rome have developed a solution using heat-transfer fins to improve this process. By adding these extensions to phase change materials, the team created a more efficient heat transfer surface that promotes better convective currents.
The research, published in EPL, focuses on optimizing the layout of these fins in 3D systems. A key finding is that the placement of the fins matters significantly. When fins are too close together, their influence zones overlap, which leads to redundant melting and wasted energy. Proper spacing allows the material between the fins to melt earlier, acting as an additional heating surface that drives more robust convective heat transfer.
Modeling these systems in 3D presents unique challenges. The researchers noted that computational demands increase significantly compared to 2D simulations, requiring high-resolution modeling to capture the complex thermal dynamics accurately. The team used the lattice Boltzmann method to simulate these phase transitions, ensuring physical parameters remained stable throughout the process.
This work has practical implications for sectors like electronics cooling, refrigeration, and hydrogen storage. By improving how heat is managed in these applications, the researchers aim to support more efficient energy use and lower carbon footprints. Future steps include refining the computational code to handle a broader range of layouts and conducting physical experiments to validate their simulation results.