Performance investigation of nanofluids as working fluid in a thermosyphon air preheater

K. Y. Leong, R. Saidur, T.m. Indra Mahlia, Y. H. Yau

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

In recent years, there has been a substantial increase in energy demand due to industrialization development. This raises concern on issues such as depletion of fossil based energy and emission of green house gasses. Hence, optimization of energy use through the thermosyphon air preheater is one of the possible approaches to address this problem. It can be used to recover and transmit the heat from the hot air (flue gas) to the cold air used for combustion process in a boiler. This study focuses on the analytical analysis of the thermal performance of a thermosyphon operated with water and nanofluids. The thermo physical properties of the selected nanofluids and relevant formulations are taken from the literatures to perform the analysis. Study found that change of nanofluid properties such as thermal conductivity only plays minor role in enhancing the thermal performance of the thermosyphon. The study implied that the hot air velocity is capable of increasing the efficiency of a thermosyphon. It is found that 23% overall heat transfer enhancement is observed when the hot air velocity increases from 2.0. m/s to 4.75. m/s for water based (7%) alumina and (4%) titanium dioxide nanofluids.

Original languageEnglish
Pages (from-to)523-529
Number of pages7
JournalInternational Communications in Heat and Mass Transfer
Volume39
Issue number4
DOIs
Publication statusPublished - 01 Apr 2012

Fingerprint

heating equipment
Air preheaters
thermosiphons
Thermosyphons
working fluids
high temperature air
Fluids
air
Air
flue gases
Water
Aluminum Oxide
thermophysical properties
fossils
boilers
Flue gases
titanium oxides
Titanium dioxide
water
Boilers

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Chemical Engineering(all)
  • Condensed Matter Physics

Cite this

@article{43408ad46750404ebbf817b7b8e21081,
title = "Performance investigation of nanofluids as working fluid in a thermosyphon air preheater",
abstract = "In recent years, there has been a substantial increase in energy demand due to industrialization development. This raises concern on issues such as depletion of fossil based energy and emission of green house gasses. Hence, optimization of energy use through the thermosyphon air preheater is one of the possible approaches to address this problem. It can be used to recover and transmit the heat from the hot air (flue gas) to the cold air used for combustion process in a boiler. This study focuses on the analytical analysis of the thermal performance of a thermosyphon operated with water and nanofluids. The thermo physical properties of the selected nanofluids and relevant formulations are taken from the literatures to perform the analysis. Study found that change of nanofluid properties such as thermal conductivity only plays minor role in enhancing the thermal performance of the thermosyphon. The study implied that the hot air velocity is capable of increasing the efficiency of a thermosyphon. It is found that 23{\%} overall heat transfer enhancement is observed when the hot air velocity increases from 2.0. m/s to 4.75. m/s for water based (7{\%}) alumina and (4{\%}) titanium dioxide nanofluids.",
author = "Leong, {K. Y.} and R. Saidur and Mahlia, {T.m. Indra} and Yau, {Y. H.}",
year = "2012",
month = "4",
day = "1",
doi = "10.1016/j.icheatmasstransfer.2012.01.014",
language = "English",
volume = "39",
pages = "523--529",
journal = "International Communications in Heat and Mass Transfer",
issn = "0735-1933",
publisher = "Elsevier Limited",
number = "4",

}

Performance investigation of nanofluids as working fluid in a thermosyphon air preheater. / Leong, K. Y.; Saidur, R.; Mahlia, T.m. Indra; Yau, Y. H.

In: International Communications in Heat and Mass Transfer, Vol. 39, No. 4, 01.04.2012, p. 523-529.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Performance investigation of nanofluids as working fluid in a thermosyphon air preheater

AU - Leong, K. Y.

AU - Saidur, R.

AU - Mahlia, T.m. Indra

AU - Yau, Y. H.

PY - 2012/4/1

Y1 - 2012/4/1

N2 - In recent years, there has been a substantial increase in energy demand due to industrialization development. This raises concern on issues such as depletion of fossil based energy and emission of green house gasses. Hence, optimization of energy use through the thermosyphon air preheater is one of the possible approaches to address this problem. It can be used to recover and transmit the heat from the hot air (flue gas) to the cold air used for combustion process in a boiler. This study focuses on the analytical analysis of the thermal performance of a thermosyphon operated with water and nanofluids. The thermo physical properties of the selected nanofluids and relevant formulations are taken from the literatures to perform the analysis. Study found that change of nanofluid properties such as thermal conductivity only plays minor role in enhancing the thermal performance of the thermosyphon. The study implied that the hot air velocity is capable of increasing the efficiency of a thermosyphon. It is found that 23% overall heat transfer enhancement is observed when the hot air velocity increases from 2.0. m/s to 4.75. m/s for water based (7%) alumina and (4%) titanium dioxide nanofluids.

AB - In recent years, there has been a substantial increase in energy demand due to industrialization development. This raises concern on issues such as depletion of fossil based energy and emission of green house gasses. Hence, optimization of energy use through the thermosyphon air preheater is one of the possible approaches to address this problem. It can be used to recover and transmit the heat from the hot air (flue gas) to the cold air used for combustion process in a boiler. This study focuses on the analytical analysis of the thermal performance of a thermosyphon operated with water and nanofluids. The thermo physical properties of the selected nanofluids and relevant formulations are taken from the literatures to perform the analysis. Study found that change of nanofluid properties such as thermal conductivity only plays minor role in enhancing the thermal performance of the thermosyphon. The study implied that the hot air velocity is capable of increasing the efficiency of a thermosyphon. It is found that 23% overall heat transfer enhancement is observed when the hot air velocity increases from 2.0. m/s to 4.75. m/s for water based (7%) alumina and (4%) titanium dioxide nanofluids.

UR - http://www.scopus.com/inward/record.url?scp=84860358260&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84860358260&partnerID=8YFLogxK

U2 - 10.1016/j.icheatmasstransfer.2012.01.014

DO - 10.1016/j.icheatmasstransfer.2012.01.014

M3 - Article

VL - 39

SP - 523

EP - 529

JO - International Communications in Heat and Mass Transfer

JF - International Communications in Heat and Mass Transfer

SN - 0735-1933

IS - 4

ER -