Determination of pool boiling Critical Heat Flux enhancement in nanofluids
Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Nuclear Science and Engineering, June 2007.
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| Format: | Thesis |
| Language: | eng |
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Massachusetts Institute of Technology
2008
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| Online Access: | http://hdl.handle.net/1721.1/41689 |
| _version_ | 1826217551392145408 |
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| author | Truong, Bao H. (Bao Hoai) |
| author2 | Jacopo Buongiorno and Lin-Wen Hu. |
| author_facet | Jacopo Buongiorno and Lin-Wen Hu. Truong, Bao H. (Bao Hoai) |
| author_sort | Truong, Bao H. (Bao Hoai) |
| collection | MIT |
| description | Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Nuclear Science and Engineering, June 2007. |
| first_indexed | 2024-09-23T17:05:28Z |
| format | Thesis |
| id | mit-1721.1/41689 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T17:05:28Z |
| publishDate | 2008 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/416892019-04-12T12:47:38Z Determination of pool boiling Critical Heat Flux enhancement in nanofluids Determination of pool boiling CHF enhancement in nanofluids Truong, Bao H. (Bao Hoai) Jacopo Buongiorno and Lin-Wen Hu. Massachusetts Institute of Technology. Dept. of Nuclear Science and Engineering. Massachusetts Institute of Technology. Dept. of Nuclear Science and Engineering. Nuclear Science and Engineering. Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Nuclear Science and Engineering, June 2007. "May 2007." Includes bibliographical references (leaves 51-53). Nanofluids are engineered colloids composed of nano-size particles dispersed in common fluids such as water or refrigerants. Using an electrically controlled wire heater, pool boiling Critical Heat Flux (CHF) of Alumina and Silica water-based nanofluids of concentration less than or equal to 0.1 percent by volume were measured. Silica nanofluids showed CHF enhancement up to 68% and there seems to be a monotonic relationship between nanoparticle concentration and magnitude of enhancement. Alumina nanofluids had CHF enhancement up to 56% but the peak occurred at the intermediate concentration. The boiling curves in nanofluid were found to shift to the left of that of water and correspond to higher nucleate boiling heat transfer coefficients in the two-phase flow regime. SEM images show a porous coating layer of nanoparticles on wires subjected to nanofluid CHF tests. These coating layers change the morphology of the heater's surface, and are responsible for the CHF enhancement. The thickness of the coating was estimated using SEM and was found ranging from 3.0 to 6.0 micrometers for Alumina, and 3.0 to 15.0 micrometers for Silica. Inductively Coupled Plasma Spectroscopy (ICP-OES) analyses were also attempted to quantify the mass of the particle deposition but the results were inconsistent with the estimates from the SEM measurement. by Bao H. Truong. S.B. 2008-05-19T16:08:54Z 2008-05-19T16:08:54Z 2007 Thesis http://hdl.handle.net/1721.1/41689 221271996 eng M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 53 leaves application/pdf Massachusetts Institute of Technology |
| spellingShingle | Nuclear Science and Engineering. Truong, Bao H. (Bao Hoai) Determination of pool boiling Critical Heat Flux enhancement in nanofluids |
| title | Determination of pool boiling Critical Heat Flux enhancement in nanofluids |
| title_full | Determination of pool boiling Critical Heat Flux enhancement in nanofluids |
| title_fullStr | Determination of pool boiling Critical Heat Flux enhancement in nanofluids |
| title_full_unstemmed | Determination of pool boiling Critical Heat Flux enhancement in nanofluids |
| title_short | Determination of pool boiling Critical Heat Flux enhancement in nanofluids |
| title_sort | determination of pool boiling critical heat flux enhancement in nanofluids |
| topic | Nuclear Science and Engineering. |
| url | http://hdl.handle.net/1721.1/41689 |
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