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Multiphase Science and Technology
SJR: 0.124 SNIP: 0.222 CiteScore™: 0.26

ISSN Imprimir: 0276-1459
ISSN On-line: 1943-6181

Multiphase Science and Technology

DOI: 10.1615/MultScienTechn.2018022667
pages 267-291

NUMERICAL INVESTIGATIONS AND PERFORMANCE EVALUATION OF A FOLDED TUBE HEAT TRANSPORT SYSTEM UNDER BOILING CONDITIONS

Mukesh Kumar
Reactor Engineering Division, Bhabha Atomic Research Centre, Mumbai, India
Avinash Moharana
Reactor Engineering Division, Bhabha Atomic Research Centre, Mumbai 400085, Maharashtra, India
Raj K. Singh
Reactor Engineering Division, Bhabha Atomic Research center, Mumbai, India
Arun K. Nayak
Homi Bhabha National Institute, Anushakti Nagar, Mumbai 400094, Maharashtra, India; Reactor Engineering Division, Bhabha Atomic Research Centre, Mumbai 400085, Maharashtra, India
Jyeshtharaj B. Joshi
Homi Bhabha National Institute, Anushaktinagar, Mumbai 400 094, India; Department of Chemical Engineering, Institute of Chemical Technology, Matunga, Mumbai 400 019. India

RESUMO

Folded tube heat exchangers are the choice of the designer owing to their simple and compact designs. These heat exchangers provide better heat transfer performance in comparison to straight tube heat exchangers. Generally, empirical models developed for straight tubular systems are used for designing the folded tube heat transport systems. To evaluate the performance of one such system, efforts have been made in this study. A folded tube system is simulated using system code RELAP5 and CFD and its performance was evaluated. A part of the folded tube system is modelled using CFD and velocity and void distribution were observed and analysed. Euler-Euler model is utilized for the two phase boiling simulations. Conclusions are made on the basis of the 3D flow field obtained by CFD. The results indicate that the design calculations show under prediction of heat transfer coefficient, when compared with the 3D CFD predictions.


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