Full Text Available
Note: Clicking the button above will open the full text document at the original institutional repository in a new window.
Plenum losses in forced draught air-cooled heat exchangers
Thesis (MEng)--University of Stellenbosch, 1996.
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_ | 1867614136442028032 |
|---|---|
| access_status_str | Open Access |
| author | Meyer, Christiaan Johannes |
| author2 | Kroger, D. G. |
| author_browse | Kroger, D. G. Meyer, Christiaan Johannes |
| author_facet | Kroger, D. G. Meyer, Christiaan Johannes |
| author_sort | Meyer, Christiaan Johannes |
| collection | Thesis |
| dc_rights_str_mv | Stellenbosch University |
| description | Thesis (MEng)--University of Stellenbosch, 1996. |
| format | Thesis |
| id | oai:scholar.sun.ac.za:10019.1/55211 |
| institution | Stellenbosch University (South Africa) |
| language | en_ZA |
| last_indexed | 2026-06-10T12:47:14.760Z |
| 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:10019.1/55211 Plenum losses in forced draught air-cooled heat exchangers Meyer, Christiaan Johannes Kroger, D. G. Stellenbosch University. Faculty of Engineering. Dept. of Mechanical and Mechatronic Engineering. Heat exchangers Plenum space Air heaters Aerodynamics Heat exchangers -- Design and construction Thesis (MEng)--University of Stellenbosch, 1996. ENGLISH ABSTRACT: This investigation aims to obtain a better understanding of the aerodynamic behavior of forced draught air-cooled heat exchangers (ACHEs) that make use of the normal or delta heat exchanger configurations. Particular emphasis is placed on the losses experienced within the plenum chambers of ACHEs. An experimental investigation of the performance characteristics of a wide range of ACHEs is conducted. During the investigation a number of component and geometrical changes are made to the ACHEs in order to determine what effect these changes have on the ACHE performance characteristics. These component and geometrical changes include - the use of different fan types and fan sizes - the use of different heat exchanger types - the use of heat exchangers with different frontal areas - the use of heat exchangers with different flow resistance characteristics - variation in the position of the fan rotor in the fan-axial direction within the fan casing - variation in the distance between the fan casing exit plane and the heat exchanger inlet plane (plenum chamber depth) - the use of guide vanes at the inlet and/or outlet of the delta heat exchanger From the results of the experimental investigation a set of design guide lines for ACHEs making use of the normal heat exchanger configuration is formulated. A recovery coefficient is also introduced that allows for a more accurate prediction of the operating point of a certain range of ACHEs. The results of the experimental investigation also indicate that kinetic energy recovery takes place within the plenum chamber of an ACHE making use of the delta heat exchanger configuration and that the use of guide vanes at the outlet of the delta heat exchanger leads to a greater increase in the operating point volume flow rate of the ACHE than the use of inlet guide vanes. Areas for possible future research are identified in the light of the experimental results. AFRIKAANSE OPSOMMING: Die doel van die ondersoek is om meer insig te verkry in die ae rodinamiese gedrag van lugverkoelde warmte-uitruilers(L VWR) in die geforseerde trek mode. Beide die normale en delta warmteuitruilerkonfigurasies is eksperimenteel ondersoek. Klem word veral gele op verliese wat plaasvind in die plenumkamers van bogenoemde L VWRs. Die effek van sekere komponent en geometriese veranderinge op die werksverrigting van 'n wye reeks L VWRs is ondersoek. Hierdie veranderinge sluit die volgende in - die gebruik van verskillende tipes en groottes waaiers - die gebruik van verskillende tipes warmte-uitruilers - die gebruik van warmte-uitruilers met verskillende frontale areas - die gebruik van warmte-uitruilers met verskillende vloei-weerstande - ' n variasie in die aksiale posisie van die waaier rotor in die waaier huls - 'n variasie in die afstand gemeet van die waaier huls uitlaat vlak en die warmte-ruiler inlaat vlak (plenum diepte) - die gebruik van lei-lemme by die delta warmte-ruiler inlaat en/of uitlaat 'n Ste! ontwerpsriglyne vir L VWRs wat gebruik maak van die normale warmte-uitruilerkonfigurasie is opgestel gebaseer op die resultate van die eksperimentele ondersoek. 'n Plenumkamerherwinningsfaktor is ook gedefinieer wat 'n meer akkurate voorspelling van die werksverrigting van 'n sekere reeks L VWRs moontlik maak. Die resultate van die eksperimentele ondersoek dui verder aan dat daar we! herwinning van kinetiese energie plaasvind in die plenumkamer van L VWRs wat van die delta warmte-uitruilerkonfigurasie gebruik maak. Die gebruik van lei-lemme by die uitlaat van die delta warmte-uitruiler lei tot 'n groter toename in volumevloeitempo as wanneer lei-lemme by die inlaat van die delta warmte-uitruiler gebruik word. Areas vir moontlike verdere navorsing word ook aangedui in die lig van die eksperimentele resultate. Masters 2012-08-27T11:36:56Z 2012-08-27T11:36:56Z 1996 Thesis http://hdl.handle.net/10019.1/55211 en_ZA Stellenbosch University 316 pages : illustrations application/pdf Stellenbosch : Stellenbosch University |
| spellingShingle | Heat exchangers Plenum space Air heaters Aerodynamics Heat exchangers -- Design and construction Meyer, Christiaan Johannes Plenum losses in forced draught air-cooled heat exchangers |
| title | Plenum losses in forced draught air-cooled heat exchangers |
| title_full | Plenum losses in forced draught air-cooled heat exchangers |
| title_fullStr | Plenum losses in forced draught air-cooled heat exchangers |
| title_full_unstemmed | Plenum losses in forced draught air-cooled heat exchangers |
| title_short | Plenum losses in forced draught air-cooled heat exchangers |
| title_sort | plenum losses in forced draught air cooled heat exchangers |
| topic | Heat exchangers Plenum space Air heaters Aerodynamics Heat exchangers -- Design and construction |
| url | http://hdl.handle.net/10019.1/55211 |
| work_keys_str_mv | AT meyerchristiaanjohannes plenumlossesinforceddraughtaircooledheatexchangers |