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ISSN Druckformat: 1064-2285
ISSN Online: 2162-6561
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AN EXPERIMENTAL INVESTIGATION OF EFFECTS OF SURFACTANT TYPES ON THERMAL PERFORMANCE OF A HEAT PIPE CHARGED WITH SINGLE AND HYBRID NANOFLUIDS INCLUDING Fe AND ZnO NANOPARTICLES
ABSTRAKT
Nanofluids are the suspensions of engineered-nanoparticles and one of the most used working fluids in thermal systems for the aim of performance improvement. The type of surfactant which is generally used in nanofluid preparation to come over nanoparticle-related problems has also an important role in the improvement of thermal performance. This study aims to investigate the impacts of surfactant type on the thermal performance of single and hybrid nanofluids used in a plain, copper-made heat pipe heat exchanger. In this regard, Fe/deionized water, ZnO/deionized water, and Fe + ZnO/deionized water nanofluids at a mass concentration of 2.0% were prepared. As a surfactant, Triton X-100 and sodium dodecyl benzene sulfonate were used. The wall temperatures, thermal resistance, and efficiency of the heat pipe were investigated by a series of tests under different operating conditions applied on evaporator and condenser sections. For an empirical comparison, the tests initially were performed by using deionized water as working fluid and then for each single and hybrid nanofluids each of which contains a different surfactant. The findings obtained showed that the best results were recorded when sodium dodecyl benzene sulfonate was used in both single and hybrid nanofluids. The maximum increment rate in efficiency and improvement rate in thermal resistance were achieved as up to 42.5% and 56.7%, respectively.
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