Experimental Investigation of The Effect of Nanoparticle Size on The Performance of Thermosyphon with Clinoptilolite /Water Nanofluid
E. Y. GÜRBÜZ Erdem ÇİFTÇİ Adnan Sözen U. KARAKAYA
AbstractThe heat transfer characteristics of the heat transfer devices can be enhanced by changing the properties and flow features of working fluids. In this regard, heat transfer characteristics of a two–phase closed thermosyphon (TPCT) with clinoptilolite/water nanofluid are experimentally determined for 3 different particle size of clinoptilolite nanoparticles, that is 50 nm, 340-370 nm and 450-500 nm, respectively. The TPCT is fabricated from the copper tube with the 13 mm inner and 15 mm outer diameters, whereas the length of it is 1 m. The experimental work was carried out under different operating conditions ranging from 200 W to 400 W and 5 g/s to 10 g/s for the heater power and coolant mass flow rate, respectively. The input parameters such as effects of mass flow rates of cooling water, heater power and thermal resistance of the TPCT were investigated. It is observed that the efficiency of the TPCT increases when clinoptilolite/water nanofluid was used as the working fluid instead of deionized water. Moreover, the maximum enhancement in the thermal performance was obtained as approximately 16% for all conditions in the experiments in which TPCT was charged with the nanofluid as the working fluid.