Boiling heat transfer of subcooled water in a horizontal rectangular channel: observation of mEB and mEB generation

2001 ◽  
Vol 30 (5) ◽  
pp. 426-438 ◽  
Author(s):  
Koichi Suzuki ◽  
Kinichi Torikai ◽  
Hedeaki Satoh ◽  
Junji Ishimaru ◽  
Yasuo Tanaka
Keyword(s):  
Heat Transfer ◽  
Boiling Heat Transfer ◽  
Rectangular Channel ◽  
Subcooled Water

scholarly journals Boiling Heat Transfer of Subcooled Water in a Horizontal Rectangular Channel. Observation of MEB and MEB generation.

1999 ◽  
Vol 65 (637) ◽  
pp. 3097-3104 ◽  
Author(s):  
Koichi SUZUKI ◽  
Kinichi TORIKAI ◽  
Hedeaki SATOH ◽  
Junji ISHIMARU ◽  
Yasuo TANAKA
Keyword(s):  
Heat Transfer ◽  
Boiling Heat Transfer ◽  
Rectangular Channel ◽  
Subcooled Water

Boiling heat transfer in swirl flow of subcooled water

2002 ◽  
Author(s):  
Aleksey V. Dedov ◽  
Alexander T. Komov ◽  
Alexander N. Varava ◽  
Victor V. Yagov
Keyword(s):  
Heat Transfer ◽  
Boiling Heat Transfer ◽  
Swirl Flow ◽  
Subcooled Water

scholarly journals Effect of Metal Foam Insert Configurations on Flow Boiling Heat Transfer and Pressure Drop in a Rectangular Channel

Materials ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4617
Author(s):  
Sanghyun Nam ◽  
Dae Yeon Kim ◽  
Youngwoo Kim ◽  
Kyung Chun Kim
Keyword(s):  
Heat Transfer ◽  
Pressure Drop ◽  
Mass Flux ◽  
Test Section ◽  
Boiling Heat Transfer ◽  
Metal Foam ◽  
Flow Boiling ◽  
Rectangular Channel ◽  
Saturation Pressure ◽  
Two Phase

Heat transfer under flow boiling is better in a rectangular channel filled with open-cell metal foam than in an empty channel, but the high pressure drop is a drawback of the empty channel method. In this study, various types of metal foam insert configurations were tested to reduce the pressure drop while maintaining high heat transfer. Specifically, we measured the boiling heat transfer and pressure drop of a two-phase vertical upward flow of R245fa inside a channel. To measure the pressure and temperature differences of the metal foam, differential pressure transducers and T-type thermocouples were used at both ends of the test section. While the saturation pressure was kept constant at 5.9 bar, the steam quality at the inlet of the test section was changed from 0.05 to 0.99. The channel height, moreover, was 3 mm, and the mass flux ranged from 133 to 300 kg/m2s. The two-phase flow characteristics were observed through a high-speed visualization experiment. Heat transfer tended to increase with the mean vapor quality, and, as expected, the fully filled metal foam channel offered the highest thermal performance. The streamwise insert pattern model had the lowest heat transfer at a low mass flux. However, at a higher mass flux, the three different insert models presented almost the same heat transfer coefficients. We found that the streamwise pattern model had a very low pressure drop compared to that of the spanwise pattern models. The goodness factors of the flow area and the core volume of the streamwise patterned model were higher than those of the full-filled metal foam channel.

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