Research on Thermophysical Properties of Nanoliquids Based on SiO2 Nanoparticles for Use as a Heat-Transfer Medium in Solar-Thermal Converters |
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| Authors: | Zh.?S.?AkhatovEmail author S.?Z.?Mirzaev Zhiyong?Wu S.?S.?Telyaev E.?T.?Zhuraev T.?I.?Zhuraev |
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| Affiliation: | 1.Physical and Technical Institute Physics of the Sun,Academy of Sciences of the Republic of Uzbekistan,Tashkent,Uzbekistan;2.Institute of Ion-Plasma and Laser Technologies,Academy of Science of the Republic of Uzbekistan,Tashkent,Uzbekistan;3.Solar Energy Laboratory,Institute of Electrical Engineering CAS,Beijing,China |
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| Abstract: | This paper presents an analysis of the modern state of studies of the thermophysical properties of nanofluids and the heat-transfer mechanism in them. The results of experimental studies of obtaining and determining the dynamic viscosity of the nanofluids (SiO2 + water) with various concentrations of nanoparticles are given. Nanofluids are obtained using a two-stage method in an ultrasonic field with a frequency of 20 kHz. It is shown that, in the SiO2 + water system, nanoparticles with sizes of 7, 12, and 16 nm are most stable. Various SiO2 concentrations in the volume range 0.5–5% were tested, and their thermophysical properties were studied for the purpose of using them as a heat-transfer medium in flat-plate solar collectors. |
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