This result provides some reference for the selection and use of working substance in a microchannel cooling concentrated photovoltaic and thermal (CPV/T) system. option is available for measuring sample viscosity and viscoelastic properties. Measuring the zeta potential of High Conductivity Samples using the Zetasizer Nano Measuring the zeta potential of samples at high ionic concentration requires modification of the measurement settings. From the perspective of the preparation method, the thermal conductivity of nanofluids dispersed by high shear microfluidizer is higher than that by ultrasonic dispersion. The Zetasizer Nano ZSP is the premium system in the Zetasizer range. Keithley 228 voltage/current source (x 2) Malvern Zetasizer Nano ZS90 particle analyzer.
When the mass fraction of the carbon nanotube nanofluids is 10% and the SiO 2/water nanofluids is 8%, their field synergy numbers and heat transfer enhancement factors both reach maximum. ThermTest TT-TC-01 thermal conductivity instrument. Viscosity and Thermal Conductivity Measurements The viscosity of dispersions and that of the ethylene glycol-water (50 - 50) mixture was measured using a digital viscometer (LVDV Pro-II, Brookfield Engineering, USA). in the nanofluids with particle size analyzer (Zetasizer Nano S90, Malvern). The zeta potential was measured using a Zetasizer (Nano-ZS, Malvern Instruments, USA). Moreover, the synergistic performance of carbon nanotube nanofluids is also superior to that of SiO 2/water nanofluids. Also, the thermal conductivity of the nanofluids was measured using a. Combined with field synergy theory analysis of the heat transfer performance of nanofluids, results show that the thermal conductivity of carbon nanotube nanofluids is higher than that of SiO 2/water nanofluids, and the thermal conductivity of nanofluid rises with the increase of mass fraction and temperature. The physical properties of nanofluids were tested using a Malvern Zetasizer Nano Instrument and a Hot Disk Thermal Constant Analyzer. In this study, the thermal conductivity properties of carbon nanotube nanofluids and SiO 2/water nanofluids were compared and analyzed experimentally using different preparation methods. A transient heated needle (KD2 Pro, Decagon Devices, Inc.
Carbon nanotube nanofluids have wide application prospects due to their unique structure and excellent properties. Electrical conductivity and zeta potential of the nanofluids were measured using Zetasizer Nano (Malvern Instruments Ltd., Malvern, UK).