Menu
Academics > Undergraduate Degree Programs > College of Engineering > COE Department > Mechanical Engineering > Senior Design Projects List > Design of Experiments to study the enhancement of heat transfer rate of vehicle radiator using Nano fluid
Design of Experiments to study the enhancement of heat transfer rate of vehicle radiator using Nano fluid

Project Overview

It is theoretically approved that using Nano particles would improve the performance of the heat transfer. This project is to investigate the concept of using nanofluid in heat exchangers experimentally.
Nanofluids are engineered colloids made of a base fluid and nanoparticles (1-100 nm). Nanofluids have higher thermal conductivity and single-phase heat transfer coefficients than their base fluids. The concept of Nanofluids refers to a new kind of heat transport fluids by suspending Nano scaled metallic or nonmetallic particles in base fluids. Energy transport of the Nano fluid is affected by the properties and dimension of nanoparticles as well as the solid volume fraction.
The convective heat transfer coefficient of the nanofluid increases with the flow velocity as well as the volume fraction of nanoparticles and it is larger than that of the base liquid water under the same flow velocity. In some cases, the viscosity of the dispersed fluid sharply increases with increasing the particle volume fraction and becomes much higher than that of the base liquid, so that higher volume fraction of the solid particles may suppress heat transfer enhancement of the suspension.
One of difficulties in this experiment is the controlling of the Nano particles flow within the water layers in the heat exchanger tube. However, this problem can be overcome by using ultra sounds waves. In addition, according to Yimin.X “The relationship between the amount of Nano particles in the water flow and the heat transfer efficiency is directly proportional until it reaches the breaking point which gives then an opposite relationship” so we have to do optimization between these two parameters during the experiment. Also, some well-performance Nano particles cause corrosion in the tubes which makes us to find a solution for that and trying another kind of Nano particle to compare between them.

Project Objectives

  • Objective1: Setting up the experiment equipment.

    This project will involve the suspension of Nano particles in a fluid, and having it heated and passed through a radiator. This process will be accomplished with the use of a household water heater, pipes, car radiator, fan, and ultrasound attachments. A temperature and pressure gauges will be placed before and after the fluid enters the radiator, which will insure the accuracy of our results.
    The water heater will be set to a temperature of 30 degrees C. The temperature and pressure will be monitored before entering the Radiator, and after exiting. This will allow us to compare the efficiency of the system on more than one criterion.
    The Nano particles will be suspended using ultrasound devices placed in various places to insure that the Nano particles do not precipitate. The design of the piping will also be in a way that causes the least chance for precipitation or blockages.
  • Objective2: Doing the experiment to investigate the concept of Nano fluid in heat exchangers.

    We are attempting to practically prove what has already been done theoretically, which is that Nano fluids would increase the efficiency of a system with a slight or no pressure drop. This would mean that Nano fluids could be used in industrial settings to increase the efficiency of the systems for nominal costs. Since our project is short term we will not take into account the possibility of corrosion.
  • Objective 3: Optimizing the results and Comparison between the experimental and theoretical results.

    Our research indicates that there is a threshold ratio after which the increase in the volume of Nano particles would hinder the system. Our research show us that the limit is near 20% Nano to fluid volume ratio, and after that there may be pressure drop, increase friction, or other factors that compromise the system.


Presentation


Final Report


Picture Gallery