AlN/Saf Su Nanoakışkanının Isı Borusu Performans Parametreleri Üzerindeki Etkilerinin Deneysel Olarak Araştırılması

Abstract

An aqueous nanofluid solution containing aluminum nitride (AlN) nanoparticles was prepared and tested in a plain heat pipe under different operating conditions. The thermal resistance and efficiency of the heat pipe, both of which are the performance indicators for heat pipes, were comparatively studied, and the alterations in temperature of the heat pipe wall were monitored. Figure A. The nanofluid preparation processPurpose: The aim of this study is to improve the heat transfer performance of a heat pipe via AlN/deionized water nanofluid. Initially, a nanofluid suspension consisting of AlN nanoparticles (60-70 nm) and Triton X-100 surfactant was prepared at the final volumetric concentration of 1.3%, and then tested in a heat pipe. Theory and Methods:The circular heat pipe used in the experiments was made of copper material with a wall thickness of 1 mm, an inner diameter of 13 mm and a length of 1000 mm. In order to observe the effects of nanoparticles, experiments were initially carried out for deionized water and then for nanofluid solution. In the experiments, the thermal resistance and efficiency of the heat pipe, both of which are the performance indicators for heat pipes, were comparatively studied, and the alterations in temperature of the heat pipe wall were monitored. The experiments were run under 150 W, 300 W, and 400 W heating power, and 3 g/s, 6 g/s, and 9 g/s cooling water mass flow rate conditions.Results: With the use of nanofluid containing aluminum nitride nanoparticles instead of deionized water as the working fluid, the maximum enhancements in thermal resistance and efficiency were recorded as 10.9% and 45.6%, respectively. Conclusion:Heat pipe wall temperatures and boiling point were reduced significantly by using nanofluid as a working fluid. When AlN nanofluid was used instead of deionized water, a decrease of up to 10.9% was achieved in the thermal resistance of the heat pipe. A maximum increase of 45.6% was obtained in the efficiency of the heat pipe with the usage of nanofluid. The benefits of using AlN nanofluid in the heat pipe were also been demonstrated.