Heat transfer correlation for flow boiling in small to micro tubes

Development and Validation of a Minichannel Evaporator Model under Dehumidification

“…It is worth mentioning that Mahmoud and Karayiannis (2013) reported a similar result for the Cooper correlation. They presented a detailed comparison of the flow boiling heat transfer coefficient for R134a in stainless steel micro tubes with 21 macro and microscale correlations and models.…”

Heat transfer characteristics on lignite thin-layer during hot air forced convective drying

“…The widely used parameters for global assessment are the mean absolute percentage error (MAE) defined by Eq. (16), and the percentage of experimental data (b) within error bands [48,49].…”

Forced convective boiling heat transfer of water in vertical rectangular narrow channel

“…Convective boiling heat transfer experiments in horizontal mini channels with binary mixture refrigerant were performed by Pamitran et al (2007), and a new boiling heat transfer coefficient correlation based on the superposition model was developed with 11.20% mean deviation. 5152 data points were collected by Mahmoud and Karayiammis (2013), and the heat transfer database includes a broad range of experimental conditions, the new correlation predicted 92% of the data within the ±30% error bands with a MAE (meat absolute error) value of 14.3%. In the flow boiling region, some researchers thought the two-phase forced convection was the dominant mechanism.…”

“…Compact heat exchangers are expected to play a vertical role in the nuclear industries due to its high heat transfer performance and larger heat transfer surface area per unit volume (Lee and Lee, 2001;Sobierska et al, 2006;Mahmoud and Karayiammis, 2013;Wang et al, 2013). Mostly, a compact heat exchanger is composed of an array of rectangular narrow channels with the small gap size (typically in 0.5-2 mm).…”

“…Based on the Chen correlation a number of flow boiling heat transfer correlations published in the last three decades. Up to now the correlation by Gungor and Winterton (1986), Kenning and Cooper (1989), Kandlikar (1990), Liu and Winterton (1991), Warrier et al (2002), Saitoh et al (2007), Pamitran et al (2007), Kim and Mudawar (2013a), and Mahmoud and Karayiammis (2013) are among the widely used correlations. The Chen type correlations are shown in Table 1, the correlation proposed by Gungor and Winterton (1986) is a modification of the Chen correlation, and the Boiling number is introduced to the new correlation to express the generation of bubble itself in the boiling process results in significant disturbance of the layer and improved heat transfer.…”