Doctoral Dissertations

Nasser Zouli

Keywords and Phrases

Heat transfer coefficient; Thermal boundary layer film thickness; Nanoparticles; Nusselt number; Thermal conductivity; Thermal desalination

Abstract

“The enhancement of thermal conductivity and local heat transfer coefficient, under laminar and turbulent flow regimes, of water-based spherical Al2O3, CuO, and Fe2O3 nanofluids have been experimentally investigated for the improvement of the thermal desalination processes using a newly developed sophisticated noninvasive heat transfer coefficient probe that is flush mounted on the inner wall surface of the test section. The nanoparticles have been selected because of their superior thermal conductivity and low cost, as well as the magnetic characteristic of Fe2O3 nanoparticle since a magnet can collect it and reuse. Also, Fe2O3 nanoparticles with saline water representing seawater has been investigated for the first time for improvement of evaporation and heat transfer characteristics to enhance the performance of multi stage flash (MSF) units in thermal desalination process. The thermal conductivity and local heat transfer coefficient increased with the increase of the volume fraction and temperature of the nanofluids also with decreasing the nanoparticle size. Also, the results show that the material from which the particle is produced is a key factor in determining the nanofluids thermal conductivity and local heat transfer coefficient. Regarding the application of nanofluids with saline water as a base fluid, stable saline water nanofluid showed lower boiling temperatures and fast boiling. This would preheat the cooling seawater quickly and at low temperatures before reaching the brine heater in real MSF process. The improvement of local heat transfer obtained represents the first step to estimate the water production increase amount by using saline water nanofluid”--Abstract, page iv.

Advisor(s)

Al-Dahhan, Muthanna H.

Committee Member(s)

Liang, Xinhua
Rezaei, Fateme
Barua, Dipak
Dogan, Fatih

Department(s)

Chemical and Biochemical Engineering

Degree Name

Ph. D. in Chemical Engineering

Comments

The author (Zouli) would like to thank the University of Jazan for giving him the financial support.

Publisher

Missouri University of Science and Technology

Publication Date

Fall 2018

Journal article titles appearing in thesis/dissertation

  • Enhancement of thermal conductivity and local heat transfer coefficients using Fe2O3/water nanofluid for improved thermal desalination processes
  • Impact of nanoparticles material on thermal conductivity and heat transfer coefficients of nanofluids
  • Nanofluid effect on water evaporation/condensation and heat transfer coefficient for desalination

Pagination

xvii, 179 pages

Note about bibliography

Includes bibliographic references.

Rights

© 2018 Nasser Zouli, All rights reserved.

Document Type

Dissertation - Open Access

File Type

text

Language

English

Thesis Number

T 12069

Electronic OCLC #

1313117330

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