نتایج جستجو برای: hybrid nanofluids
تعداد نتایج: 193304 فیلتر نتایج به سال:
In this paper, the characteristics of forced convection heat transfer in water-based nanofluids are studied by means experimental and theoretical analysis. Nusselt number were calculated changing volume fraction type nanoparticles tube. The effects Reynolds on studied. An exergy analytical model was established for laminar nanofluid under condition constant flow. At same condition, friction ent...
In the recent years, great interest has been devoted to the unique properties of nanofluids. The dispersion process and the nanoparticle suspension stability have been found to be critical points in the development of these new fluids. For this reason, an experimental study on the stability of water-based dispersions containing different nanoparticles, i.e. single wall carbon nanohorns (SWCNHs)...
An overview of systematic studies that address the complexity of nanofluid systems and advance the understanding of nanoscale contributions to viscosity, thermal conductivity, and cooling efficiency of nanofluids is presented. A nanoparticle suspension is considered as a three-phase system including the solid phase (nanoparticles), the liquid phase (fluid media), and the interfacial phase, whic...
Ethylene glycol (EG)-based zinc oxide (ZnO) nanofluids containing no surfactant have been manufactured by one-step pulsed wire evaporation (PWE) method. Round-robin tests on thermal conductivity measurements of three samples of EG-based ZnO nanofluids have been conducted by five participating labs, four using accurate measurement apparatuses developed in house and one using a commercial device....
Experimental investigation of heat transfer during pool boiling of two nanofluids, i.e., water-Al2O3 and water-Cu has been carried out. Nanoparticles were tested at the concentration of 0.01%, 0.1%, and 1% by weight. The horizontal smooth copper and stainless steel tubes having 10 mm OD and 0.6 mm wall thickness formed test heater. The experiments have been performed to establish the influence ...
This paper presents an experimental investigation of convective heat transfer coefficient for nanofluids using spiral pipe heat exchanger. The aim of this study is to investigate experimentally flow and convective heat transfer characteristics of water-based nanofluids flowing through a spiral pipe. The test section consist of spiral pipe with ratio pitch per diameter is 7.0 and mean hydraulic ...
Abstract The use of hybrid nanofluids in direct-absorption solar collectors is an efficient approach to harnessing energy. To address current energy challenges, this study new nanoparticle aggregates containing distinct silver-based and iron-oxide nanophases (Ag+Fe2O3) were used improve the photothermal conversion characteristics direct absorption collectors. main goal was investigate effect co...
The hybrid nanofluid is formed when more than one type of nanoparticle used in the preparation process. study nanofluids most recent trend, as they have potential to improve greener energy production. Solar thermal systems still require further research before can be widely used. As a result, current uses mono CuO and + Cu/water working fluid explore performance an evacuated tube solar collecto...
The study of well-known Darcian fluidic streams and hybrid nanofluids is an essential need nowadays researchers in regard to their exceptional heat transfer rates implementations. significance controlling transmission cannot be overemphasized. Therefore, this article scrutinizes the Darcy Forchheimer flow nanofluid toward a flexible tube. near surface cylinder are investigated by applying Darcy...
Because of its potential to directly transform solar energy into heat and energy, without harmful environmental effects such as greenhouse gas emissions. Hybrid nanofluid is an efficient way improve the thermal efficiency systems using a possible transfer fluid with superior thermo-physical properties. The object this paper study latest developments in hybrid applications fields different colle...
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