A Critical Review on Condensation Heat Transfer in Microchannels and Minichannels

Abstract

A C ritical R eview on C ondensation H eat T ran sfer in M icro ch an n els and M in ic h a n n e lsCondensation in microchannels and minichannels is widely used in small devices such as air-cooled condensers for the air-conditioning and automotive industry, in heat pipes, thermosyphons and other applications for system thermal control. Currently, many research centers all over the world are dealing with the structure and operation of com pact refrigerating devices. This is in line with the trend of 21st century that is moving towards the use of energy-saving and environmentally friendly technical equipment. In the present study, a critical review on condensation heat transfer in microchannels and minichannels is presented. This review include a wide range of different parameters such as the channel diameter (d), the saturation temperature (Ts), the mass flux (G), the vapor quality (x), different working fluids like steam, C02 or R744, FC72, R22, R410A, and R407C, various shapes such as circular and noncircular, different orientations like hori zontal and vertical, and systems consist o f either single or multiple channels. At the end, recommendations for future studies will be given. As a result, this paper cannot only be used as the starting point for the researcher interested in condensation heat transfer in microchannels and minichannels, but it also includes recommendations for future studies on condensation heat transfer in microchannels and minichannels.

Prediction of Heat Transfer during Condensation in Non-Circular Channels

“…Many correlations have been proposed specifically for minichannels. These have been reviewed by Awad et al [27] and Del Col et al [28]. Recent correlations for mini channels include those by Jige et al [29], Rahman et al [30], and Keinath and Garimella [31].…”

Analytical model of condensation in mini dusts

“…В программе уже задана система уравнений в разделе Fluid -Microfluidics Module. По результатам численных исследований данный подход дает хорошие результаты для фреонов R134a и R404a и некоторых других [8,18,19], но, видимо, имеет большую погрешность для природных хладагентов, так как наблюдается отсутствие выходных данных работы ученых с такими веществами.…”

Experimental investigation on the viscosity of Water-CNT and Antifreeze-CNT nanofluids

“…Duangthongsuk et al [18] and Nitiapiruk [19] extended their nanofluid work to the flow in microchannel heat sinks. Dalkilic et al [20][21][22][23], Awad et al [24] and Bashirnezhad [25] prepared review papers in order to show the importance of nanofluid flow in single and twophase flows and also determination of their physical properties.…”