Comparison of Discharge Performance of Thermal Protection Systems Based on Phase Change Materials with Different Thermal Improvements

Year 2024, Volume: 3 Issue: 2, 44 - 54, 26.12.2024

Ahmet Can Çapar , Adnan Öztürk , Aydın Demir , Ümit Nazlı Temel

https://doi.org/10.69560/cujast.1529209

Abstract

This study focuses on the removal of heat transferred to the PCM during phase change material based passive thermal protection of transient heat releasing electronic systems in order to make it ready for the next thermal protection. In other words, the cooling performances (discharge) of PCM with heat stored (charge) for a certain period of time were compared in terms of different improvement techniques applied on PCM. For this purpose, firstly, Fin/PCM thermal protection systems obtained by adding different numbers of aluminium fins into the PCM were obtained. Similarly, Nanoparticle/PCM thermal protection systems obtained by adding carbon-based nanoparticles with high thermal conductivity at the rates of 1% and 3% by mass into the PCM were formed. The cooling performances of the obtained Fin/PCM and Nanoparticle/PCM thermal protection systems were evaluated in terms of maximum surface temperature and maximum surface temperature difference criteria. The results are given in comparison with the performance of PCM thermal protection. Compared to PCM, the best cooling performance belongs to the PCM thermal protection with six fins added with 10.5%. In the Nanoparticle/Fin/PCM hybrid thermal protection, it is determined that the components do not create any synergistic effect for the cooling performance and the main contribution is provided by the fins.

Keywords

PCM, Cooling performance, Fin, Nanoparticles, Hybrid Thermal Protection

Farklı Termal İyileştirmeler Uygulanmış Faz Değiştiren Malzeme Esaslı Termal Koruma Sistemlerinin Deşarj Performanslarının Karşılaştırılması

Abstract

Bu çalışma geçici olarak ısı açığa çıkaran elektronik sistemlerin faz değiştiren malzeme esaslı pasif termal korunumu sırasında FDM bünyesine aktarılan ısının bir sonraki termal korumaya hazır hale getirilmesi için uzaklaştırılması işlemlerine odaklanmıştır. Başka bir ifadeyle belirli bir süre ısı depolanmış (şarj) FDM’nin soğuma performansları (deşarj) FDM üzerinde uygulanan farklı iyileştirme teknikleri açısından karşılaştırılmıştır. Bu amaçla öncelikle FDM içerisine farklı sayıda alüminyum kanat eklemesi ile elde edilen Kanat/FDM termal koruma sistemleri elde edilmiştir. Benzer biçimde FDM içerisine kütlece %1 ve %3 oranlarında yüksek ısıl iletkenliğe sahip karbon tabanlı nanoparçacık eklenmesiyle elde edilen Nanoparçacık/FDM termal koruma sistemleri oluşturulmuştur. Elde edilen Kanat/FDM ve Nanoparçacık/FDM termal koruma sistemlerinin soğuma performansları maksimum yüzey sıcaklığı ve maksimum yüzey sıcaklık farkı kriterleri açısından değerlendirilmiştir. Sonuçlar RT-44 termal korumasının performansı ile karşılaştırmalı olarak verilmiştir. FDM ile karşılaştırıldığında en iyi soğuma performansı %10.5 ile altı kanat eklenmiş FDM termal korumasına aittir. Nanoparçacık/Kanat/FDM hibrit termal korumasında bileşenlerin soğuma performansı için herhangi bir sinerjik etki oluşturmadıkları ve asıl katkının kanatlar tarafından sağlandığı belirlenmiştir.

Keywords

FDM, Soğuma performansı, Kanat, Nanoparçacık, Hibrit termal koruma

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