Investigation of the change of thermosyphon heat pipe performance with hybrid nano particle addition to the work fluid

Abstract

It is known that nanoparticle additives have significant effects on increasing the thermal efficiency of thermal systems. The aim of this study is to examine the thermal performance of thermosiphon heat pipes (THP), one of the heat pipe types with the lowest manufacturing costs, by adding hybrid nanoparticles to the working fluid and to investigate the effects of hybrid nanoparticle addition. The effects of filling ratio and concentration on thermal performance were examined. It has been observed that the Al2O3+TiO2–H2O hybrid nanofluid can combine the high stability feature of one of the individual nanofluids with the high thermal conductivity feature of the other. It has been observed that the highest thermal efficiency in the hybrid nanofluid-filled system was achieved at 65% filling rate. Considering the combined effect of the two parameters by considering the filling rate together with the nanofluid concentration, it was seen that the condition where maximum performance was achieved was 65% filling rate and 0.5% nanofluid concentration.

Keywords

• Thermosyphon heat pipe
• Hybrid nano particles
• Heat transfer

Termosifon ısı borusu performansının iş akışkanına hibrit nano parçacık katkısıyla değişiminin incelenmesi

Öz

Nano parçacık katkısının ısıl sistemlerin ısıl verimini artırmada önemli etkileri olduğu bilinmektedir. Bu çalışmanın amacı, imalat maliyeti en düşük ısı borusu tiplerinden biri olan termosifon ısı borularının (TIB) ısıl performansını iş akışkanına hibrit nano parçacık katkısı yapılarak ele alınması ve hibrit nano parçacık eklentisinin etkilerinin araştırılmasıdır. Doldurma oranı ve konsantrasyonun ısıl performans üzerindeki etkileri incelenmiştir. Al2O3+TiO2–H2O hibrit nano akışkanının tekil nano akışkanlardan birinin sahip olduğu yüksek stabilite özelliği ile diğerinin sahip olduğu yüksek ısıl iletkenlik özelliklerini bir araya getirebildiği görülmüştür. Hibrit nano akışkanla dolu sistemde en yüksek ısıl verimin %65 doldurma oranında elde edildiği görülmüştür. Doldurma oranının nano akışkan konsantrasyonu ile birlikte ele alınarak iki parametrenin bileşik etkisi dikkate alındığında maksimum performansın elde edildiği koşulun %65 doldurma oranı ve %0.5 nano akışkan konsantrasyonu olduğu görülmüştür.

Anahtar Kelimeler

• Termosifon Isı Borusu
• Hibrit nano parçacık
• Isı transferi

Kaynakça

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