The Effect of using Al2O3/Water Based Nano-fluid on Heat Transfer in Heat Exchangers with Rotating Straight Inner Tube

2020 ◽  
Author(s):  
tarkan KOCA
Keyword(s):  
Heat Transfer ◽  
Heat Exchangers ◽  
Nano Fluid ◽  
Water Based

Heat Transfer Effect of CNT and Ethylene Glycol Based Nano-Fluid in Twisted Tape Heat Exchanger with Balls

2020 ◽  
Vol 12 (4) ◽  
Author(s):  
R. Saravanan ◽  
M. Karuppasamy ◽  
M. Chandrasekaran ◽  
V. Muthuraman
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Ethylene Glycol ◽  
Heat Exchangers ◽  
Twisted Tape ◽  
Heat Transfer Fluids ◽  
Nano Fluid ◽  
Carbon Nano Tubes ◽  
Heat Transfer Improvement ◽  
Nano Fluids

Heat transfer improvement is the main parameter in a heat exchanging equipment. Few methods to increase the coefficient of heat transfer is by creating the turbulence in heat exchanging elements and changing the heat transfer fluids. For current analysis of tube heat exchangers, tape inserts containing balls are implemented with nano-fluids in Carbon Nano Tubes (CNT) and ethylene glycol. 3D modelling and simulation of twisted tape heat exchanger with balls were carried out using Solidworks and ANSYS Workbench. Heat transfer rate, friction factor, temperature difference in the heat exchangers, Reynolds number and Nusselt number variations are assessed in this work.

scholarly journals Review: Observation on CFD Analysis of ZnO and TiO2 Nanofluid with Oil and Ethylene Glycol in Square and Helical Coil Heat Exchanger

2021 ◽  
Vol 9 (12) ◽  
pp. 503-507
Author(s):  
Rakesh Kumar
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Heat Exchangers ◽  
Helical Coil ◽  
Coiled Tube ◽  
Heat Transfer Fluids ◽  
Nano Fluid ◽  
High Heat Transfer ◽  
Compact Size ◽  
Coil Heat

Abstract: Helically coiled heat exchangers are globally used in various industrial applications for their high heat transfer performance and compact size. Nanofluids can provide the excellent thermal performance in helical coil heat exchangers. Research studies on heat transfer enhancement have gained serious momentum during recent years and have been proposed many techniques by different research groups [1]. A fluid with higher thermal conductivity has been developed to increase the efficiency of heat exchangers. The dispersion of 1-100nm sized solid nanoparticles in the traditional heat transfer fluids, termed as nanofluids, exhibit substantial higher convective heat transfer than that of traditional heat transfer fluids. Nanofluid is a heat transfer fluid which is the combination of nanoparticles and base fluid that can improve the performance of heat exchanger systems. In this present paper the efforts are made to understand that how to compare the heat transfer rate in Copper helically coiled tube and squared coiled tube heat exchanger using Zinc Oxide and Titanium Dioxide Nano fluid by studying research papers of various authors. Keywords: Helical Coil, Nano-fluid, Heat Exchanger, CFD, Pressure Drop, Temperature Distribution.

CFD Analysis of Twisted Tape Heat Exchanger with Twist Ratio of 3 in Metallic and Ceramic Nano Fluids

2020 ◽  
Vol 12 (3) ◽  
Author(s):  
M. Karuppasamy ◽  
R. Saravanan ◽  
M. Chandrasekaran ◽  
V. Muthuraman
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Heat Exchangers ◽  
Unit Length ◽  
Primary Objective ◽  
Heat Transfer Fluid ◽  
Twisted Tape ◽  
Tube Heat Exchanger ◽  
Nano Fluid ◽  
Twist Ratio

The heat transfer enhancement is primary objective in the heat exchangers. The heat exchangers are employed for cooling, heating and evaporation purposes in the industries. Many of the heat exchangers designed as the heat transfer fluid flow inside the tube. So, in this research, the double tube heat exchanger is considered with unit length. The passive method is one in which the flow resistance is to be introduced to enhance the heat transfer rate without affecting the pumping force. So, the tube inserts with twist ratio of 3 is considered. The water and water-copper oxide nano fluid and water-silicon dioxide nano fluid were considered for investigation. The flow properties such as pressure, temperature, velocity and turbulence kinetic energy were varied and discussed. The thermal performance, friction factor and enhancement factors are compared and discussed. The SiO2-water nano fluid has outperformed than the other fluids studied.

Sign in / Sign up

Export Citation Format

Share Document