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https://hdl.handle.net/1822/41779
Título: | Estimating friction factors in a fouled annulus |
Autor(es): | Melo, L. F. Pinheiro, J. D. R. S. |
Data: | Ago-1985 |
Editora: | Canadian Society for Chemical Engineering (CSChE) |
Revista: | The Canadian Journal of Chemical Engineering |
Citação: | Melo, L. F.; Pinheiro, J., Estimating friction factors in a fouled annulus. Canadian Journal of Chemical Engineering, 63(4), 693-694, 1985 |
Resumo(s): | Fouling of heat transfer surfaces modifies the associated conductive thermal resistance and convective heat transfer coefficient. Often, the latter varies as a result of changes in the roughness of the deposition surface. If fouling is being studied in an annular heat exchanger, deposits may form on both surfaces of the annular cross section, and an estimation of the friction factors of each fouled surface is needed. In order to evaluate these factors a simple method can be used as described in this paper, based on pressure drop measurements and current equations. Experimental results are reported and appear to support the method. L'encrassement des surfaces de transfert de chaleur modifie leur résistance thermique conductive et leur coefficient de transfert de chaleur par convection. Celui-ci change, souvent, comme résultat de variations de la rugosité de la surface causées par des dépôts. Dans un échangeur de section annulaire, les dépôts peuvent se former sur les deux surfaces de l'espace annulaire. Il est donc nécessaire de calculer les coefficients de frottement de chacune de ces surfaces, ce qui peut être accompli en appliquant la méthode décrite ici, basée sur des équations simples et des mesures de la perte de charge. Les résultats expérimentaux semblent confirmer la validité de cette méthode. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/41779 |
DOI: | 10.1002/cjce.5450630426 |
ISSN: | 0008-4034 |
Versão da editora: | http://onlinelibrary.wiley.com/journal/10.1002/(ISSN)1939-019X |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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document_6881_1.pdf | 211,99 kB | Adobe PDF | Ver/Abrir |