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Enhancement of cooling tower performance by manipulation of rain zone drop size
Thesis (MEng)--University of Stellenbosch, 1995.
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| Format: | Thesis |
| Language: | en_ZA |
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Stellenbosch : Stellenbosch University
2012
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| _version_ | 1867613791003344896 |
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| access_status_str | Open Access |
| author | Oosthuizen, Henry Randolph |
| author2 | Erens, P. J. |
| author_browse | Erens, P. J. Oosthuizen, Henry Randolph |
| author_facet | Erens, P. J. Oosthuizen, Henry Randolph |
| author_sort | Oosthuizen, Henry Randolph |
| collection | Thesis |
| dc_rights_str_mv | Stellenbosch University |
| description | Thesis (MEng)--University of Stellenbosch, 1995. |
| format | Thesis |
| id | oai:scholar.sun.ac.za:10019.1/54736 |
| institution | Stellenbosch University (South Africa) |
| language | en_ZA |
| last_indexed | 2026-06-10T12:41:45.229Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from SUNScholar — Stellenbosch University Repository |
| publishDate | 2012 |
| publishDateRange | 2012 |
| publishDateSort | 2012 |
| publisher | Stellenbosch : Stellenbosch University |
| publisherStr | Stellenbosch : Stellenbosch University |
| record_format | dspace |
| source_str | SUNScholar — Stellenbosch University Repository |
| spelling | oai:scholar.sun.ac.za:10019.1/54736 Enhancement of cooling tower performance by manipulation of rain zone drop size Oosthuizen, Henry Randolph Erens, P. J. Stellenbosch University. Faculty of Engineering. Dept. of Mechanical and Mechatronic Engineering. Cooling towers -- Computer simulation Drops -- Computer simulation Image processing Dissertations -- Mechanical engineering Theses -- Mechanical engineering Thesis (MEng)--University of Stellenbosch, 1995. AFRIKAANSE OPSOMMING: Die moontlikheid om die warmteoordrag in die reensone van 'n natuurlike trek nat koeltoring te vcrbeter deur die gemiddelde druppel diameter van die sproei te verminder is ondersoek. Eksperimentele wcrk was daarop gerig om tipiese druppelgrootte verspreidings onder druppakking te bepaal, asook die verkryging van werklike verrigtings-data vir verskiJlende pakking en reensone kombinasies in 'n koeltoring toetsfasiliteit. 'n Fotografiese metode wat gebruik maak van beeldverwerkingstegniekc is ontwikkel om die druppelgrootte verspreidings wat in die )meltoring toetsfasiliteit gevind word te bepaal. 'n Rekenaar simulasieprogram wat ontwikkel is deur Dreyer [940Rl] is verder gebruik om reensone verrigtingsdata ( oordragskarakteristieke en druppelgrootte verspreidings) teoreties te vcorspel, vir vergelyking met en evalusie van die eksperimentele resultate. Dit is bewys dat die plasing van 'n laag spatroosters reg onder druppakking die gerniddelde druppeldiameter in die reensone verrninder het, wat gelei het tot 'n ooreenstemmende toename in oordragskarakteristiek. Met die gebruik van 'n rekenaar simulasie program is bereken dat hierdie opstelling die termiese kapasiteit van 'n koeltoring met tot 5 % kan verbeter. ENGLISH ABSTRACT: The possibility of improving the heat transfer in the rain zone of large natural draft wet cooling towers, by decreasing the mean drop diameter in this region, has been investigated. Experimental studies were aimed at determining typical drop size distributions under trickle packs and obtaining actual performance data for packing and rain zone combinations in a cooling tower test facility. A photography-based method, which utilizes image processing techniques, was develo!Jed t() determine the drop size distributions found in the test facility. A computer simulation program developed by Dreyer [94DRI] was used to theoretically predict rain zone performance data (i.e., transfer coefficients and drop size distribution data) for comparison with and evaluation of the experimental data. I: was found that by placing a layer of splash grids beneath a trickle pack the mean drop diameter in the rain zone was decreased, resulting in corresponding increases in transfer characteristic. Using a computer simulation program it was calculated that this arrangement could increase the thermal capacity of a large natural draft cooling tower by up to 5 %. 2012-08-27T11:36:42Z 2012-08-27T11:36:42Z 1995-03 Thesis http://hdl.handle.net/10019.1/54736 en_ZA Stellenbosch University 106 p. ill. application/pdf Stellenbosch : Stellenbosch University |
| spellingShingle | Cooling towers -- Computer simulation Drops -- Computer simulation Image processing Dissertations -- Mechanical engineering Theses -- Mechanical engineering Oosthuizen, Henry Randolph Enhancement of cooling tower performance by manipulation of rain zone drop size |
| title | Enhancement of cooling tower performance by manipulation of rain zone drop size |
| title_full | Enhancement of cooling tower performance by manipulation of rain zone drop size |
| title_fullStr | Enhancement of cooling tower performance by manipulation of rain zone drop size |
| title_full_unstemmed | Enhancement of cooling tower performance by manipulation of rain zone drop size |
| title_short | Enhancement of cooling tower performance by manipulation of rain zone drop size |
| title_sort | enhancement of cooling tower performance by manipulation of rain zone drop size |
| topic | Cooling towers -- Computer simulation Drops -- Computer simulation Image processing Dissertations -- Mechanical engineering Theses -- Mechanical engineering |
| url | http://hdl.handle.net/10019.1/54736 |
| work_keys_str_mv | AT oosthuizenhenryrandolph enhancementofcoolingtowerperformancebymanipulationofrainzonedropsize |