Thermal response to periodic heating of a heat sink incorporating a phase change material

Mirza, Shahzeb; Amon, Cristina H.; Chandra, Sanjeev

doi:10.1016/j.ijheatmasstransfer.2024.125761

International Journal of Heat and Mass Transfer

2024

DOI: 10.1016/j.ijheatmasstransfer.2024.125761

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Thermal response to periodic heating of a heat sink incorporating a phase change material

Shahzeb Mirza,

Cristina H. Amon,

Sanjeev Chandra

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2024

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Cited by 1 publication

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Assessment of Thermal Management Using a Phase-Change Material Heat Sink under Cyclic Thermal Loads

Ye,

Dong,

Opolot

et al. 2024

Energies

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Phase-change materials (PCMs) are widely used in the thermal management of electronic devices by effectively lowering the hot end temperature and increasing the energy conversion efficiency. In this article, numerical studies were performed to understand how temperature instability during the periodic utilization of electronic devices affects the heat-dissipation effectiveness of a phase-change material heat sink embedded in an electronic device. Firstly, three amplitudes of 10 °C, 15 °C, and 20 °C for fixed periods of time, namely, 10 min, 20 min, and 40 min, respectively, were performed to investigate the specific effect of amplitude on the PCM melting rate. Next, the amplitude was fixed, and the impact of the period on heat sink performance was evaluated. The results indicate that under the 40 min time period, the averaged melting rate of PCMs with amplitudes of 20 °C, 15 °C, and 10 °C reaches the highest at 19 min, which saves 14 min, 10 min, and 8 min, respectively, compared with the constant input of the same melting rate. At a fixed amplitude of 20 °C, the PCM with a period of 40 min, 20 min, and 10 min has the highest averaged melting rate at 6 min, 11 min, and 19 min, saving the heat dissipation time of 3 min, 8 min, and 14 min, respectively. Overall, it was observed that under identical amplitude conditions, the peak melting rate remains consistent, with longer periods resulting in a longer promotion of melting. On the other hand, under similar conditions, larger amplitude values result in faster melting rates. This is attributed to the fact that the period increases the heat flux output by extending the temperature rise, while the amplitude affects the heat flux by adjusting the temperature.

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Assessment of Thermal Management Using a Phase-Change Material Heat Sink under Cyclic Thermal Loads

Ye,

Dong,

Opolot

et al. 2024

Energies

View full text Add to dashboard Cite

show abstract

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Thermal response to periodic heating of a heat sink incorporating a phase change material

Cited by 1 publication

References 27 publications

Assessment of Thermal Management Using a Phase-Change Material Heat Sink under Cyclic Thermal Loads

Assessment of Thermal Management Using a Phase-Change Material Heat Sink under Cyclic Thermal Loads

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