Full Text Available
Note: Clicking the button above will open the full text document at the original institutional repository in a new window.
Inlet manifold tests and performance evaluation of dephlegmators in air-cooled steam condensers
Thesis (MScEng)--University of Stellenbosch, 2000.
Saved in:
| Main Author: | |
|---|---|
| Other Authors: | |
| Format: | Thesis |
| Language: | en_ZA |
| Published: |
Stellenbosch : Stellenbosch University
2012
|
| Subjects: | |
| Tags: |
No Tags, Be the first to tag this record!
|
| _version_ | 1867613732999266304 |
|---|---|
| access_status_str | Open Access |
| author | Smit, Leslie van Zyl |
| author2 | Kroger, D. G. |
| author_browse | Kroger, D. G. Smit, Leslie van Zyl |
| author_facet | Kroger, D. G. Smit, Leslie van Zyl |
| author_sort | Smit, Leslie van Zyl |
| collection | Thesis |
| dc_rights_str_mv | Stellenbosch University |
| description | Thesis (MScEng)--University of Stellenbosch, 2000. |
| format | Thesis |
| id | oai:scholar.sun.ac.za:10019.1/51800 |
| institution | Stellenbosch University (South Africa) |
| language | en_ZA |
| last_indexed | 2026-06-10T12:40:49.380Z |
| 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:10019.1/51800 Inlet manifold tests and performance evaluation of dephlegmators in air-cooled steam condensers Smit, Leslie van Zyl Kroger, D. G. Stellenbosch University. Faculty of Engineering. Dept. of Mechanical and Mechatronic Engineering. Condensers (Steam) Heat exchangers Power plants Dissertations -- Mechanical and mechatronic engineering Theses -- Mechanical and mechatronic engineering Thesis (MScEng)--University of Stellenbosch, 2000. ENGLISH ABSTRACT: Measurements on air-cooled reflux steam condensers or dephlegmators at different power plants have shown that sections of these units do not transfer heat effectively over a range of operating conditions. The ineffective sections may be due to flooding in the finned tubes although entrainment of condensate in certain steam inlet manifolds is usually the main reason for the poor performance. In this dissertation factors that limit effective dephlegmator operation are discussed and the influence of two inlet manifold designs on dephlegmator operation is investigated. Laboratory experiments are conducted to show under which conditions liquid entrainment occurs and to visualize the flow distribution within the respective manifolds. An alternative, essentially horizontal arrangement of the dephlegmator is proposed. In order to evaluate the performance of such a system, the heat transfer and pressure drop on the steam-side is determined experimentally in an air-cooled finned tube. No flooding was observed during tests conducted at zero and negative tube angles to the horizontal. AFRIKAANSE OPSOMMING: Toetse op lugverkoelde stoom terugvloeikondensors, of deflegmators, by verskeie kragstasies het getoon dat sekere dele van hierdie eenhede onder verskeie werkstoestande nie warmte effektief oordra nie. Hierdie oneffektiewe dele kan deur vloeding van die vinbuise veroorsaak word alhoewel die meesleur van kondensaat in sekere stoom inlaatspruitstukke gewoonlik die hoof oorsaak is. In hierdie dissertasie word faktore wat effektiewe deflegmator werksverrigting beinvloed bespreek en die invloed van twee inlaatspruitstukontwerpe op deflegmator werksverrigting ondersoek. Eksperimente is in 'n laboratorium uitgevoer om aan te toon onder watter werkstoestande vloeistof samesleping voorkom en om vloeiverdeling binne die onderskeie inlaatspruitstukke te visualiseer. 'n Altematiewe, wesenlike horisontale deflegmator opstelling word voorgestel. Die werksverrigting van hierdie voorstelling is ondersoek deur die warmteoordrag en stoorn-kant drukval eksperimenteel te bepaal in 'n lugverkoelde vinbuis. Geen vloeding is opgemerk vir toetsgevalle waar klein negatiewe of zero hoeke tot die horisontaal ondersoek is nie. 2012-08-27T11:34:41Z 2012-08-27T11:34:41Z 2000-12 Thesis http://hdl.handle.net/10019.1/51800 en_ZA Stellenbosch University 1 v. (various pagings) : ill. application/pdf Stellenbosch : Stellenbosch University |
| spellingShingle | Condensers (Steam) Heat exchangers Power plants Dissertations -- Mechanical and mechatronic engineering Theses -- Mechanical and mechatronic engineering Smit, Leslie van Zyl Inlet manifold tests and performance evaluation of dephlegmators in air-cooled steam condensers |
| title | Inlet manifold tests and performance evaluation of dephlegmators in air-cooled steam condensers |
| title_full | Inlet manifold tests and performance evaluation of dephlegmators in air-cooled steam condensers |
| title_fullStr | Inlet manifold tests and performance evaluation of dephlegmators in air-cooled steam condensers |
| title_full_unstemmed | Inlet manifold tests and performance evaluation of dephlegmators in air-cooled steam condensers |
| title_short | Inlet manifold tests and performance evaluation of dephlegmators in air-cooled steam condensers |
| title_sort | inlet manifold tests and performance evaluation of dephlegmators in air cooled steam condensers |
| topic | Condensers (Steam) Heat exchangers Power plants Dissertations -- Mechanical and mechatronic engineering Theses -- Mechanical and mechatronic engineering |
| url | http://hdl.handle.net/10019.1/51800 |
| work_keys_str_mv | AT smitleslievanzyl inletmanifoldtestsandperformanceevaluationofdephlegmatorsinaircooledsteamcondensers |