Heat Transfer Augmentation in Heat Exchanger by Passive Techniques: a Review
| Autor: | V. S. Chandratre, N. K. Sane, A. A. Keste |
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| Rok vydání: | 2017 |
| Předmět: | |
| Zdroj: | International Review of Mechanical Engineering (IREME). 11:635 |
| ISSN: | 2532-5655 1970-8734 |
| DOI: | 10.15866/ireme.v11i9.13165 |
| Popis: | Heat transfer enhancement by different passive inserts has become a promising technology nowadays for many researchers in industrial applications like refrigeration and air conditioning, heat exchangers, power generation, solar heaters, process industries, nuclear reactors, automobile industries. Energy is the primary and most universal measure of all kinds of work by human beings and nature. The increasing cost of energy as well as material has led to a wide scope of research aiming more efficient heat exchange process. To achieve an increase heat transfer rate with minimum friction loss emerged number of passive inserts. In this study, numerical and experimental investigations of heat transfer and fluid flow Characteristics of a circular tube fitted with different passive inserts for different geometric parameters and materials are reviewed. This paper focus on heat transfer enhancement in laminar, transition and turbulent region with passive inserts like twisted tapes, combined twisted tapes, circular ring type, wire coil type, baffles type, rib type for numerical and experimental studies. Despite of heat transfer enhancement frictional resistances are also increased with the presence of inserts inside the tubes. The present study provides an exhaustive review on feasible heat transfer augmentation. Heat transfer and friction factor characteristics have been investigated for different geometric parameters and materials of insert. Also some researchers found empirical equations for transitional and fully developed turbulent flow and developed non dimensional groups to study the effect of different types of inserts on heat transfer enhancement.This study is reviewed in this paper as well. |
| Databáze: | OpenAIRE |
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