IJERT-Effect of Concentration of Al2O3 Nano Particles in Base Fluid on Thermal and Flow Properties to Enhance the Heat Transfer Rate (original) (raw)
Related papers
2021
Cooling is almost important in industry. It is needed to improve the performance of cooling system. However due to the low thermal conductivity of fluid there will be limitations for the heat transfer characteristics. Nano fluid i.e suspension of nano size particles in the base fluid such as water ,ethylene glycol ,oil and diesel were used as innovative heat transfer fluid for cooling applications because thermal conductivity of the nano fluid is more than the conventional fluid such as water, ethylene glycol ,oil etc. There are many literature surveys available which shows that increase in the thermal conductivity and heat transfer characteristic with increased in concentration of nano particles in base fluid. The aim of this review is to summarize how increased concentration of nano particles increases the thermal conductivity and heat transfer rate. Also about the effect on the thermal and flow properties of nano fluid.
2015
Heat transfer in a Car radiator is carried out to cool circulating fluid which regulated of water and a mixture of water and coolant materials like Ethylene glycol (EG). In this Experimental study presented the mixture Ethylene glycol + water (50:50) combination with Al2O3 nanoparticle which is called nanofluids in used Car Radiator. In this Experimental Study Volume Concentration used 0.1%, 0.5%, 1% By mixing of Al2O3 nanoparticles (size 40 nm). Results of Thermal conductivity, over all heat transfer coefficient, Reynolds number, coolant pressure drop, pumping power have been represented in the present work. It is observed that Overall heat transfer coefficient & heat transfer rate increased different volume concentration by mixing Al2O3 particle and flow rate range 2-5 LPM respectively. Thermal conductivity of coolant basefluid (Ethylene Glycol) and nanofluid increases almost linearly with temperature (25 to 45oC).
HEAT TRANSFER ENHANCEMENT OF NANO FLUIDS –A REVIEW
Thermal conductivity is considered important factor for rapid cooling and heating application. Base heat transfer fluid normally having low thermal conductivity, so we goes to Nano fluid for increases the heat transfer rate. Nano fluid is nanometre sized particle such as metal, oxide, and carbide etc., dispersed into base heat transfer fluid. In this paper shows varying factor affecting the thermal conductivity of Nano fluid at different conditions. All researcher tried to increase the heat transfer rate by considering thermal conductivity Nano fluid. Thermal conductivity is increased with increasing concentration of metal particle within critical limit. Thermal conductivity is affected by the following parameters like shape, size, clustering, collision, porous layer, melting point of nanoparticle etc., controlling this type of parameters to increase the thermal conductivity of Nano fluid. Nano fluid is advanced heat transfer fluid for next generation.
Ultrahigh performance cooling is one of the important needs of many industries. However, low thermal conductivity is a primary limitation in developing energy-efficient heat transfer fluids that are required for cooling purposes. Nanofluids are engineered by suspending nano particles with average sizes below 100 nm in heat transfer fluids such as water, oil, diesel, ethylene glycol, etc. Innovative heat transfer fluids are produced by suspending metallic or non-metallic nanometer-sized solid particles. Experiments have shown that nanofluids have substantial higher thermal conductivities compared to the base fluids. These suspended nanoparticles can change the transport and thermal properties of the base fluid. The aim of this project is to summarize recent developments in research on nanofluids, and to carry out cfd analysis for four different nano fluids and the result is analysed, two fluids are selected for experimentation work and finally the experimented result is compared with...
Fluid Mechanics Research International Journal, 2019
Nano fluids are dispersions of high thermal conductivity nano particles in a base fluid, and offer potential to improve thermal conductivity of it. Literature data on the effect of particle size on the thermal conductivity enhancement of nano fluids are inconsistent and limited. Hence in the present study, the effect of particle size on thermal conductivity enhancement of distilled water- Al2 O3 nano fluid has been investigated experimentally using transient hot wire apparatus. The particle volume concentration of Al2 O3 nano particles for mean diameter of 15nm and 60nm are varied between 0.1 and 3%. The enhancement in the thermal conductivity is approximately 22% and 17% for 15 nm and 60nm particle size respectively, at 3% particle volume concentration at 30ο C. These experimental results are consistent with the predictions from the Brownian motion based model, show that the enhancement in the thermal conductivity of the distilled water- Al2 O3 nano fluid decreases with an increase in the particle size.
IJERT-Heat Transfer Enhancement Using Nano Fluid - A Review
International Journal of Engineering Research and Technology (IJERT), 2014
https://www.ijert.org/heat-transfer-enhancement-using-nano-fluid-a-review https://www.ijert.org/research/heat-transfer-enhancement-using-nano-fluid-a-review-IJERTV3IS10964.pdf This article reports have theoretical study on the heat transfer and flow characteristics of a nano fluids consisting of water flowing in a horizontal shell and tube heat exchanger under flows are investigated. The AL 2 O 3 nano particles are used in the present study. The result show that the heat transfer coefficient of nano fluid is slightly higher than that of the base liquid at same mass flow rate and at same temperature. The heat transfer coefficient of the nano fluid increases with an increases in the mass flow rate, also the heat transfer coefficient increases with the increases of the volume concentration of the AL 2 O 3 nano fluid, however increasingly the volume concentration cause increasing the viscosity of the nano fluid leading to increase in friction factor.
HEAT TRANSFER ENHANCEMENT USING VARIOUS NANO FLUIDS –A REVIEW
Heat exchanger plays a very important role in modern industry. To improve the heat transfer rate the new innovative fluid is introduced called Nanofluid to improve the overall heat transfer. Nano fluid is Nano meter sized particle such as metal, oxide, and carbide etc., dispersed into base heat transfer fluid. This review paper is on the preparation of the nanofluids. Comparison of the past research on Nanofluids. Applications of the Nanofluids. Thermal conductivity is affected by the following parameters like shape, size, clustering, collision, porous layer, melting point of nanoparticle etc., controlling this type of parameters to increase the thermal conductivity of Nano fluid. © 2018, IRJET | Impact Factor value: 7.211 | ISO 9001:2008 Certified Journal |
International Journal of Heat and Mass Transfer, 2018
In recent times conventional heat transfer fluids such as water and engine oil are widely used in the automobile radiator. However, to improve the thermal performance of the system, a lot more is required from the aspect of the heat transfer fluid. Major improvements in cooling capabilities have been constrained because of poor thermal conductivities of the working fluids, which is vital in the enhancement of heat transfer. The use of nano-sized (1-100 nm) solid particles as an additive suspended in the base fluid is one of the technique to enhancement heat transfer. This study aims to evaluate the performance of the heat transfer characteristics of water/anti-freezing based nanofluid as a coolant for car radiator. For the based fluid, a mixture of water and Ethylene Glycol were used with concentration of 50% for each of the fluid. Al 2 O 3 and CuO nano particles of concentration 0.05%, 0.15% and 0.3% were added to the base fluid and then evaluate the heat transfer characteristics of the nanofluid. The mass flow rate of nanofluid in the flat tube was kept constant. The heat transfer models are simulated using ANSYS fluent solver. The performance of the heat transfer characteristics were evaluated based on certain parameters which are the heat transfer coefficient, thermal conductivity, Nusselt number, and rate of heat transfer of the nanofluids. It was found that the nanofluid that exhibited the highest heat transfer performance was the CuO nanofluid. The heat transfer coefficient was recorded at 36384.41 W/m 2 K, the thermal conductivity was 1.241 W/m K, Nusselt number was 208.71 and the rate of heat transfer was at 28.45 W. The Al 2 O 3 nanofluid had a heat transfer coefficient of 31005.9 W/m 2 K, thermal conductivity of 1.287 W/m K, Nusselt number was 173.19 and the rate of heat transfer was at 28.25 W.
Analysis of Cooling Performance of Automobile Radiator Using Nano-Fluid Al 2 O 3 and Water
SERSC Australia, 2017
This paper aims to increase the heat transfer rate of the coolant with the help of nano particles (Al2O3). It further increases the efficiency of the radiator, coolant & the engine. The best proportion of flow rate and concentration of nano-particles (Al2O3) have been achieved to maximize the heat transfer rate of the coolant. The proposed model of radiator test rig consists of radiator (1000cc) enclosed in a duct of GI sheet of 18 gauge. A centrifugal pump was used for the circulation of nano-fluid in the radiator tubes. PT-100 sensors were used for checking the temperature at different points of the radiator in the radiator test rig & a laboratory thermometer was employed for checking the coolant temperature in the reservoir. The coolant and the nano-particles were well stirred with the help of an agitator (hand grinder) to make a homogeneous mixture. The coolant when circulated at different flow rates and concentration through the radiator tubes, the max heat transfer rate was obtained at a flow rate of 4lt/min & 0.15% concentration of Al2O3.