A composite heat transfer correlation for saturated flow boiling in small channels

Abstract

While some of the data sets show opposing trends with respect to some parameters, a mean absolute error of less than 30% is achieved with the proposed correlation.

Pressure Drop and Boiling Heat Transfer Characteristics of R410A in Macro-Scale and Mini-Scale Channels

“…That means the convective boiling mechanism was active on the heat transfer mechanism of R-410A in mini-channel. In order to validate the experimental heat transfer coefficient of R410A in both mini-and macro-scale channel, Chien et al [11] compared the data with various heat transfer coefficient correlations [26,[30][31][32][33][34] include both of the correlations developed for mini-scale channel and the ones developed for macro-scale channel. The data bank consists of 452 data points including 61 data with D h > 3.0 mm (macro-scale) and 391 data with D h ≤ 3.0 mm (mini-scale).…”

An experimental investigation of flow boiling heat transfer of R-141b and R-1234yf in microchannels

“…That confirmed by experimental data from [2 6] and other papers. In despite of a large number of published methods for predicting heat transfer in microchannels, the application of these methods requires verification, and the determination of heat transfer for various heat transfer modes in boiling in microchannels, as noted in [7], remains actual. The objective of this study is to experimentally establish how the local flow boiling heat transfer coefficient correlates with the heat flux, mass flux and vapor quality.…”

A general correlation to predict the flow boiling heat transfer of R410A in macro-/mini-channels

“…Through the development and application in many fields of cooling devices, there are various studies and proposed heat transfer coefficient correlations for both minichannel and (or) macrochannel (Conventional channel) [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. Although, some well-known general correlations are extensively used such as the ones developed by Chen [2]; Shah [7;8],Gungor and Winterton [4], it's still need to develop a more exactly correlation for specific refrigerant since the reviews of Zhang et al [16], Bertsch et al [1] demonstrated the large error of existing HTC correlations with other experimental data due to the difference of operation conditions.…”

“…Although, some well-known general correlations are extensively used such as the ones developed by Chen [2]; Shah [7;8],Gungor and Winterton [4], it's still need to develop a more exactly correlation for specific refrigerant since the reviews of Zhang et al [16], Bertsch et al [1] demonstrated the large error of existing HTC correlations with other experimental data due to the difference of operation conditions.…”

“…This study reported that the nucleation mechanism was dominant and the Reynolds number was replaced by Weber number to eliminate viscous effects in favor of surface tension. Bertsch et al [1] developed a composite heat transfer correlation including nucleate and convective boiling heat transfer. The effect of bubble confinement was also taken into account.…”