Thermal Properties And Heat Transfer Study Of Dispersed Fluid With Functionalized Multiwalled Carbon Nanotube Particles

Fatin Nabilahhuda, Zahari (2015) Thermal Properties And Heat Transfer Study Of Dispersed Fluid With Functionalized Multiwalled Carbon Nanotube Particles. Project Report. UTeM, Melaka, Malaysia. (Submitted)

Text (24 pages) Thermal Properties And Heat Transfer Study Of Dispersed Fluid With Functionalized Multiwalled Carbon Nanotube Particles 24 Pages.pdf - Submitted Version Download (285kB)

Abstract

Nanofluids are gaining attention from industry as one way to improve the cooling processes because they have great characteristics in their thermal properties especially in thermal conductivity. The aim of this thesis is to form the stable nanofluids and study its thermal properties and heat transfer rate. This thesis was proposed due to the several problems in practical application of cooling agents especially in thermal properties and heat transfer rate. For this particular experiment, the nanoparticle that being used is functionalized Multi-walled Carbon Nanotube (fMWCNT). The stability of MWCNT in fluids was increased by introducing the hydroxyl groups towards its surface. Surfactant such as Polyvinylpyrrolidone (PVP) was used with deionized water as base fluid can make the nanofluids become more stable. Samples with different weight percentage (wt%) of fMWCNT and PVP was formulated to find a suitable ratio besides to analyze the thermal properties and heat transfer performance. The formulation of the nanofluids planning of the weight percentage and synthesizing of the samples (0.1 wt% - 1.0 wt%) was tested at different temperatures which is 6 °C, 25 °C and 40 °C. The performance improvement of nanofluids was compared with standard performance of deionized water in terms of thermal conductivity, viscosity and heat transfer performance. The highest enhancements of thermal conductivity of the nanofluids was succesfully recorded at 32.59% (0.7 wt% of CNT) at 40 °C while the highest enhancements of heat transfer coefficient is at 148.05% (0.5 wt% of CNT) at the temperature of 40 °C. It is determined that the 0.3 wt% of CNT exhibits the greatest improvement from the standard deionized water in terms of thermal conductivity and heat transfer coefficient. Unfortunately, 0.6 wt% and 0.7 wt% of CNT were not chosen because those samples have reduction in thermal conductivity at 6 °C and 25 °C. So they are not practical and not flexible to be applied at various temperatures.

Actions (login required)

View Item