Main Findings of Numerical Models for Hybrid PCM-Heat Sinks and Pool Boiling

Team: Mahdi Ghorbani, Dr. Hailei Wang, Dr. Nicholas Roberts

Introduction

  • Passive: Integrates PCMs with heat sinks using numerical and analytical methods.
  • Optimize PCM heat sink designs for safe temperatures.
  • Active: Explores HFE-7000 for thermal management, with pool boiling modeling.
Figure 1 – The schematic figure of the wireless charging system [1, 2, 3]

Figure 1 – The schematic figure of the wireless charging system [1, 2, 3]

Methods

Hybrid PCMs-Heat Sink
ANSYS Fluent (Enthalpy-Porosity)

PCM
Analytical Model (Similarity Method)
ANSYS Fluent (Enthalpy-Porosity)

Pool Boiling of HFE-7000 on Ferrite
ANSYS Fluent (Volume of Fluid)

Figure 2 – The heat sink configurations in numerical model and the thermophysical properties of PCMs [4]

Figure 2 – The heat sink configurations in numerical model and the thermophysical properties of PCMs [4]

Figure 3 – The set point temperature for hybrid PCMs-Heat Sinks [4]

Figure 3 – The set point temperature for hybrid PCMs-Heat Sinks [4]

Figure 4 – The surface temperature comparison or various hybrid PCMs integrated with different heat sinks [4]

Figure 4 – The surface temperature comparison or various hybrid PCMs integrated with different heat sinks [4]

Figure 5 – The volume fraction of vapor in pool boiling of HFE-7000 on copper with the applied heat flux of 110 kW/m2

Figure 5 – The volume fraction of vapor in pool boiling of HFE-7000 on copper with the applied heat flux of 110 kW/m2

Figure 6 – The comparison of experimental results [5] with numerical model in ANSYS Fluent

Figure 6 – The comparison of experimental results [5] with numerical model in ANSYS Fluent

Results (Analytical) [4]

Results

Conclusion

  • Hybrid PCM with heat sink proposed for secondary pad.
  • More research required on PCM solidification process.
  • HFE-7000 initial assessment promising on copper, potential for ferrite surface.

References

1.DOI: 10.1115/HT2023-107128
2.DOI: 10.1016/j.applthermaleng.2021.116710
3.DOI: 10.1109/APEC43599.2022.9773484.
4.DOI: 10.1016/j.icheatmasstransfer.2024.107460
5.DOI: 10.1016/j.tsep.2019.100428