A new model for flow boiling heat transfer coefficient inside horizontal tubes with twisted-tape inserts

Autor(es)

Kanizawa, Fabio Toshio ^[1] ; Mogaji, Taye Stephen ^{[1, 2]} ; Ribatski, Gherhardt ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Escola Engn Sao Carlos, Dept Mech Engn, Heat Transfer Res Grp, BR-13566590 Sao Paulo - Brazil

^[2] Fed Univ Technol Akure, Sch Engn & Engn Technol, Dept Mech Engn, Pmb 704, Ondo State - Nigeria

• Tipo de documento: Artigo Científico
• Fonte: INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID; v. 61, p. 55-68, JAN 2016.
• Citações Web of Science: 4

Resumo

This paper presents a new method to predict the heat transfer coefficient during flow boiling inside horizontal tubes containing twisted tape inserts. The method was developed based on the database presented by Kanizawa et al. This database comprises flow boiling results for horizontal tubes with internal diameters of 12.7 and 15.9 mm, twisted-tape ratios of 3, 4, 9 and 14, mass velocities ranging from 75 to 200 kg m(-2) s(-1), heat fluxes of 5 and 10 kW m(-2) and saturation temperatures of 5 and 15 degrees C. The method is flow-pattern based and considers flow boiling, dryout and mist flow regions. The predictive method also takes into account the physical picture of the swirl flow phenomenon by considering swirl flow effects promoted by the twisted tape insert. The proposed method provides satisfactory predictions and captures the main heat transfer trends of the data of Kanizawa et al. and also of independent data from literature. (C) 2015 Elsevier Ltd and International Institute of Refrigeration. All rights reserved. (AU)

• Processo FAPESP: 15/00854-5 - Caracterização de escoamento bifásico externo a banco de tubos
• Beneficiário: Fabio Toshio Kanizawa
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado
• Processo FAPESP: 14/06902-9 - Estudo teórico e experimental da vibração induzida por escoamentos bifásicos externos a banco de tubos
• Beneficiário: Fabio Toshio Kanizawa
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 10/20670-2 - Estudo Teórico e Experimental da Fração de Vazio e da Vibração Induzida pelo Padrão de Escoamento Externamente a Banco de Tubos
• Beneficiário: Fabio Toshio Kanizawa
• Modalidade de apoio: Bolsas no Brasil - Doutorado