Experimental investigation of surface vibration effects on increasing the stability and heat transfer coeffcient of MWCNTs-water nanofluid in a flexible double pipe heat exchanger

A. Hosseinian; A.H. Meghdadi Isfahani; E. Shirani

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Experimental investigation of surface vibration effects on increasing the stability and heat transfer coeffcient of MWCNTs-water nanofluid in a flexible double pipe heat exchanger

机译：表面振动效应对柔性双管热交换器MWCNTS水纳米流体稳定性和传热系数的实验研究

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?Effect of imposing mechanical vibration on a heat exchanger with nanofluids is studied for the first time.

?Imposing mechanical vibrations increase heat transfer coefficient while decrease nanoparticles deposition.

?A flexible heat exchanger made of PVDF is manufactured.

Abstract

Nanoparticles deposition is one of the most challenges for industrial use of nanofluids. In the present study, the heat transfer enhancement of Multi Wall Carbon Nano Tube, MWCNT-water nanofluid in a double pipe heat exchanger due to vibrating walls is examined for different mass fractions. This work is performed by a flexible double pipe heat exchanger made of PVDF. The forced vibration on the outer surface of the heat exchanger is imposed by electro-dynamic vibrators. Results demonstrate that imposing the vibrations increases the heat transfer coefficient remarkably, while decreases the nanoparticles deposition. Heat transfer increases by increasing the nanofluid temperature, mass flow rate, nano fluid mass fraction and vibtation

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《Experimental Thermal and Fluid Science: International Journal of Experimental Heat Transfer, Thermodynamics, and Fluid Mechanics》 |2018年第2018期|共11页
作者
A. Hosseinian; A.H. Meghdadi Isfahani; E. Shirani;
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作者单位

Department of Mechanical Engineering Najafabad Branch Islamic Azad University;

Department of Mechanical Engineering Najafabad Branch Islamic Azad University;

Department of Mechanical Engineering Najafabad Branch Islamic Azad University;

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原文格式 PDF
正文语种 eng
中图分类流体力学;
关键词
Heat transfer enhancement; Surface vibration; Flexible heat exchanger; Carbon nano tube;

机译：传热增强;表面振动;柔性换热器;碳纳米管;

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Experimental investigation of surface vibration effects on increasing the stability and heat transfer coeffcient of MWCNTs-water nanofluid in a flexible double pipe heat exchanger

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