MARC details
| 000 -LEADER |
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| fixed length control field |
04645ntm a2200289 a 4500 |
| 001 - CONTROL NUMBER |
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| control field |
vtls000094162 |
| 003 - CONTROL NUMBER IDENTIFIER |
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| control field |
KUKTEM |
| 005 - DATE AND TIME OF LATEST TRANSACTION |
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| control field |
20251117113318.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION |
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| fixed length control field |
160329t2015 my a f 000 0 eng d |
| 020 ## - INTERNATIONAL STANDARD BOOK NUMBER |
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| International Standard Book Number |
THE0005279(Local) |
| 039 #9 - LEVEL OF BIBLIOGRAPHIC CONTROL AND CODING DETAIL [OBSOLETE] |
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| Level of rules in bibliographic description |
201905141740 |
| Level of effort used to assign nonsubject heading access points |
hanafiah |
| Level of effort used to assign subject headings |
201710171128 |
| Level of effort used to assign classification |
aishah |
| -- |
201603291002 |
| -- |
shima |
| 040 ## - CATALOGING SOURCE |
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| Original cataloging agency |
UMP |
| 090 ## - LOCALLY ASSIGNED LC-TYPE CALL NUMBER (OCLC); LOCAL CALL NUMBER (RLIN) |
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| Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) |
FKM .W36 2015 r Thesis |
| 100 0# - MAIN ENTRY--PERSONAL NAME |
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| Personal name |
Wan Azmi Wan Hamzah |
| 245 1# - TITLE STATEMENT |
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| Title |
Heat transfer augmentation of water based TIO2 AND SIO2 nanofluids in a tube with twisted tape/ |
| Statement of responsibility, etc. |
Wan Azmi Wan Hamzah |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. |
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| Place of publication, distribution, etc. |
Kuantan, Pahang : |
| Name of publisher, distributor, etc. |
UMP, |
| Date of publication, distribution, etc. |
2015 |
| 300 ## - PHYSICAL DESCRIPTION |
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| Extent |
xxv, 211 p. : |
| Other physical details |
ill. (some col.) ; |
| Dimensions |
30 cm.+ |
| Accompanying material |
1 CD-ROM |
| 500 ## - GENERAL NOTE |
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| General note |
Faculty of Mechanical Engineering |
| 502 ## - DISSERTATION NOTE |
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| Dissertation note |
Thesis (Doctor of Philosophy (Mechanical Engineering)) -- Universiti Malaysia Pahang – 2015 |
| 504 ## - BIBLIOGRAPHY, ETC. NOTE |
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| Bibliography, etc. note |
Bibliography : p. 188-201 |
| 520 3# - SUMMARY, ETC. |
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| Summary, etc. |
Nanofluids have gained extensive attention due to their role in improving the efficiency of thermal systems. Conflicting statements are made in the literature regarding heat transfer enhancements with nanofluids. The objective of the present work is to evaluate heat transfer coefficients through experiments for flow of water, TiO2 and SiO2 nanofluids under similar operating conditions to determine the characteristics under which heat transfer enhancements with nanofluids can be obtained in comparison with water. The properties of TiO2 and SiO2 nanofluids are required at different concentrations, temperature and particle size. Hence, a generalized equation for the evaluation of viscosity and thermal conductivity of nanofluids is developed with the available experimental data in the literature. A test rig is fabricated with the facility to heat the liquid by wrapping with two nichrome heaters on the tube with an option to insert a twisted tape. Experiments are undertaken to determine heat transfer coefficients and friction factor with water based TiO2 and SiO2 nanofluids at 30 oC in the turbulent range of Reynolds number for flow in a tube and with twisted tape. The experimental data indicates enhancement with concentration up to 1 % and 3 % with TiO2 and SiO2 nanofluids respectively for flow in a tube. A maximum of 33 % enhancement at 3 % and 26 % at 1 % volume concentration over water are observed with SiO2 and TiO2 nanofluids respectively for flow in a tube. A further increase in concentration from these values, reduced the heat transfer coefficients. It has been determined that the heat transfer coefficient decrease when the viscosity to thermal conductivity enhancement ratio is greater than 5 which is confirmed with the experimental values of TiO2 and SiO2 nanofluids. It can be stated that enhancement in heat transfer depends on concentration and operating temperature of the nanofluid. An increase in heat transfer coefficient and friction factor with a decrease in twist ratio for water and nanofluids is observed from experiments. The experimental results indicated a maximum heat transfer coefficient of 81.1 % with TiO2 nanofluid at 1 % concentration with insert of twist ratio 5 when compared to flow of water in a tube. However, at the same twist ratio, a maximum enhancement of 94.1 % in heat transfer coefficient at 3 % concentration with SiO2 nanofluid is observed. The nanofluid friction factor with twist ratio of 5 is greater than twice the value obtained for flow of water in a tube at volume concentration higher than 2.5 %. The use of nanofluid is justified from thermo-hydraulic considerations with the estimation of 'advantage ratio'. For the case of plain tubes, it is preferable to have the flow of TiO2 and SiO2 nanofluids at 1 % and 3 % concentrations, respectively. Meanwhile for nanofluid flow with twisted tape, it is recommended to use the twist ratio of 15. The use of TiO2 nanofluids with twisted tape is suggested for volume concentrations higher than 1 %. However, the use of SiO2 nanofluids with twisted tapeis not recommended due to lower advantage ratio compared to nanofluid flow in plain tubes. The experimental data of Nusselt number obtained with twisted tape is validated with the results of the theoretical model developed. The characteristics of nanofluid flow and heat transfer are also determined. The flow of nanofluid over a twisted tape isobserved to enhance heat transfer. |
| 610 20 - SUBJECT ADDED ENTRY--CORPORATE NAME |
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| Corporate name or jurisdiction name as entry element |
Faculty of Mechanical Engineering |
| General subdivision |
Dissertations |
| 650 #0 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
Universities and Colleges |
| General subdivision |
Dissertations |
| 650 #0 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
Theses |
| 856 40 - ELECTRONIC LOCATION AND ACCESS |
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| Uniform Resource Identifier |
<a href="http://ecollib.ump.edu.my/3560/">http://ecollib.ump.edu.my/3560/</a> |
| Public note |
Library access only |