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

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...

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Main Authors: Leong, K.Y., Saidur, Rahman, Mahlia, T.M.I., Yau, Y.H.
Format: Article
Published: International Communications in Heat and Mass Transfer 2012
Subjects:
TA Engineering (General). Civil engineering (General)
TK Electrical engineering. Electronics Nuclear engineering
Online Access:http://eprints.um.edu.my/6559/
http://ac.els-cdn.com/S0735193312000152/1-s2.0-S0735193312000152-main.pdf?_tid=71ddea24-4023-11e2-8392-00000aab0f01&acdnat=1354853355_a3f5898d866dc00dfde55863d63d4774
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spelling my.um.eprints.65592019-10-25T06:22:58Z http://eprints.um.edu.my/6559/ Performance investigation of nanofluids as working fluid in a thermosyphon air preheater Leong, K.Y. Saidur, Rahman Mahlia, T.M.I. Yau, Y.H. TA Engineering (General). Civil engineering (General) TK Electrical engineering. Electronics Nuclear engineering 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. International Communications in Heat and Mass Transfer 2012 Article PeerReviewed Leong, K.Y. and Saidur, Rahman and Mahlia, T.M.I. and Yau, Y.H. (2012) Performance investigation of nanofluids as working fluid in a thermosyphon air preheater. International Communications in Heat and Mass Transfer, 39 (4). pp. 523-529. ISSN 07351933 http://ac.els-cdn.com/S0735193312000152/1-s2.0-S0735193312000152-main.pdf?_tid=71ddea24-4023-11e2-8392-00000aab0f01&acdnat=1354853355_a3f5898d866dc00dfde55863d63d4774 10.1016/j.icheatmasstransfer.2012.01.014
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
topic TA Engineering (General). Civil engineering (General)
TK Electrical engineering. Electronics Nuclear engineering
spellingShingle TA Engineering (General). Civil engineering (General)
TK Electrical engineering. Electronics Nuclear engineering
Leong, K.Y.
Saidur, Rahman
Mahlia, T.M.I.
Yau, Y.H.
Performance investigation of nanofluids as working fluid in a thermosyphon air preheater
description 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.
format Article
author Leong, K.Y.
Saidur, Rahman
Mahlia, T.M.I.
Yau, Y.H.
author_facet Leong, K.Y.
Saidur, Rahman
Mahlia, T.M.I.
Yau, Y.H.
author_sort Leong, K.Y.
title Performance investigation of nanofluids as working fluid in a thermosyphon air preheater
title_short Performance investigation of nanofluids as working fluid in a thermosyphon air preheater
title_full Performance investigation of nanofluids as working fluid in a thermosyphon air preheater
title_fullStr Performance investigation of nanofluids as working fluid in a thermosyphon air preheater
title_full_unstemmed Performance investigation of nanofluids as working fluid in a thermosyphon air preheater
title_sort performance investigation of nanofluids as working fluid in a thermosyphon air preheater
publisher International Communications in Heat and Mass Transfer
publishDate 2012
url http://eprints.um.edu.my/6559/
http://ac.els-cdn.com/S0735193312000152/1-s2.0-S0735193312000152-main.pdf?_tid=71ddea24-4023-11e2-8392-00000aab0f01&acdnat=1354853355_a3f5898d866dc00dfde55863d63d4774
_version_ 1648736047583985664
score 13.211869

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