New Method of Measure Thermal Conductivity of Nanofluids

Hosseini, Seyed Sharafaldin (2009) New Method of Measure Thermal Conductivity of Nanofluids. Masters thesis, Universiti Putra Malaysia.

[img]
Preview
PDF
510Kb

Abstract

Work on applications of nanofluids can be restricted due to unavailable conductivity meter for nanofluids in the market. This study is concerned with design and development of a conductivity meter for nanofluids for temperature range of 20°C – 50 °C for copper oxide and alumina with distilled water as base fluid. This temperature range is in accordance with ordinary thermal applications and our empirical limitations. The meter is comprised of the components such as a plastic water bath, an electrical heater, some thermometers, an electrical motor, a fan, an electrical transformer, and a 100 ml Pyrex beaker. In this method both conduction and convection were considered to measure the thermal conductivity of moving fluids. Calibration and verification of the equipment by using distilled water showed a significant agreement to conductivity standard value of ASTM standard. Results showed that CuO-distilled water has higher thermal properties than aluminadistilled water, and that means particles with higher thermal conductivity make higher conductive nanofluids. For example percentage of thermal conductivity rising for 2%mass CuO-distilled water in 45°C is equal to 33.5% but this value for alumina is equal to 26%. Among our nanofluids 4% mass particle concentration of CuO-distilled water gave the highest conductivity value and least is 1 mass% particle concentration of alumina-distilled water. Result also showed that this meter can give the conductivity value of 0.001 decimal places. Finally it can be concluded that nanofluids can consider as new generation of thermal fluid with higher thermal conductivity than traditional thermal fluids. They also can increase the efficiency of thermal equipments.

Item Type:Thesis (Masters)
Call Number:FK 2009 27
Faculty or Institute:Faculty of Engineering
ID Code:7313
Deposited By: Muizzudin Kaspol
Deposited On:16 Jun 2010 01:44
Last Modified:27 May 2013 07:34

Repository Staff Only: item control page


Universiti Putra Malaysia Institutional Repository

Universiti Putra Malaysia Institutional Repository is an on-line digital archive that serves as a central collection and storage of scientific information and research at the Universiti Putra Malaysia.

Currently, the collections deposited in the IR consists of Master and PhD theses, Master and PhD Project Report, Journal Articles, Journal Bulletins, Conference Papers, UPM News, Newspaper Cuttings, Patents and Inaugural Lectures.

As the policy of the university does not permit users to view thesis in full text, access is only given to the first 24 pages only.