Please use this identifier to cite or link to this item:
http://hdl.handle.net/1843/BUOS-9HZH35
Full metadata record
DC Field | Value | Language |
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dc.contributor.advisor1 | Luiz Machado | pt_BR |
dc.contributor.advisor-co1 | Carlos F. M. Coimbra | pt_BR |
dc.contributor.referee1 | Ricardo Nicolau Nassar Koury | pt_BR |
dc.contributor.referee2 | Antonio Augusto Torres Maia | pt_BR |
dc.contributor.referee3 | Carlos Umberto da Silva Lima | pt_BR |
dc.contributor.referee4 | Antônio Carlos Lopes da Costa | pt_BR |
dc.creator | Matheus Pereira Porto | pt_BR |
dc.date.accessioned | 2019-08-10T18:39:43Z | - |
dc.date.available | 2019-08-10T18:39:43Z | - |
dc.date.issued | 2013-09-13 | pt_BR |
dc.identifier.uri | http://hdl.handle.net/1843/BUOS-9HZH35 | - |
dc.description.resumo | This work concerns theorical and experimental methods for understanding the heat transfer mechanisms for a zeotropic fluid, namely R-407C. The refrigerant R-407C is a mixture of three refrigerants, R-134a, R-32, and R-125, which may replace R-22 in future refrigerant systems. Due to the degradation of heat transfer coefficients in mixtures such as R-407C, the classical relations may overestimate the experimental heat transfer rates. A correction based on nucleate boiling suppression factors that corrects a previously proposed relation is used to minimize the degradation error. The newly proposed relation was developed through a robust methodology based on genetic algorithm (GA) optimization for three additional refrigerants R-404a, R134a and R-22. A discussion about inventory is also presented, where a modified Otaki method is proposed for the more realistic scenario that corresponds of not knowing a priori the heat transfer coefficient. The inventory obtained by the modified Otaki method is higher than the one obtained by the traditional Otaki method. Both methods yield accurate results for R-407C. | pt_BR |
dc.language | Português | pt_BR |
dc.publisher | Universidade Federal de Minas Gerais | pt_BR |
dc.publisher.initials | UFMG | pt_BR |
dc.rights | Acesso Aberto | pt_BR |
dc.subject | Engenharia Mecânica | pt_BR |
dc.subject.other | Engenharia mecânica | pt_BR |
dc.title | Theoretical and experimental studies on boiling heat transfer for the zeotropic mixture R-407C | pt_BR |
dc.type | Tese de Doutorado | pt_BR |
Appears in Collections: | Teses de Doutorado |
Files in This Item:
File | Description | Size | Format | |
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tese_doutorado_mpp.pdf | 2.96 MB | Adobe PDF | View/Open |
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