DIRECT-CONTACT HEAT TRANSFER TO DROPS IN AN INTERMITTENT ELECTRIC FIELD

1978 ◽  
Author(s):  
Nobufuji Kaji ◽  
Yasuhiko H. Mori ◽  
Yoshiro Tochitani ◽  
Kazunari Komotori
Keyword(s):  
Heat Transfer ◽  
Electric Field ◽  
Direct Contact ◽  
Contact Heat ◽  
Contact Heat Transfer

Augmentation of Direct-Contact Heat Transfer to Drops with an Intermittent Electric Field

1980 ◽  
Vol 102 (1) ◽  
pp. 32-37 ◽  
Author(s):  
N. Kaji ◽  
Y. H. Mori ◽  
Y. Tochitani ◽  
K. Komotori
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Coefficient ◽  
Electric Field ◽  
Transfer Coefficient ◽  
Direct Contact ◽  
Silicone Oil ◽  
Duty Ratio ◽  
Contact Heat ◽  
Contact Heat Transfer ◽  
Water Drops

The characteristics of the augmentation technique previously proposed by the authors has been studied experimentally with water drops 3.9 to 5.9 mm in diameter rising in methylphenyl silicone oil. Each drop is subjected to an intermittent electric field applied periodically perpendicular to its trajectory, and the drop responds by periodic elongation in the direction of the field. The dependence of heat transfer coefficient on the strength, frequency and duty ratio of the field is presented and discussed.

Increasing efficiency in direct contact heat transfer

1987 ◽  
Vol 6 (4) ◽  
pp. 208-210 ◽  
Author(s):  
Ralph F. Strigle ◽  
Tsuneo Nakano
Keyword(s):  
Heat Transfer ◽  
Direct Contact ◽  
Contact Heat ◽  
Contact Heat Transfer

An Analysis of a Direct Contact Ice Slurry Generator

2008 ◽  
Author(s):  
M. A. Wahed ◽  
M. N. A. Hawlader
Keyword(s):  
Heat Transfer ◽  
Simulation Model ◽  
Direct Contact ◽  
Coolant Flow ◽  
Temperature Profiles ◽  
Ice Slurry ◽  
Generation System ◽  
Contact Heat ◽  
Flow Rates ◽  
Contact Heat Transfer

Attempts have been made to study an ice slurry generation system where two immiscible liquids, water and a coolant, are used to produce ice slurry by direct contact heat transfer. A mathematical model has been developed to evaluate the heat transfer phenomena between the coolant drops and the water in the ice slurry generation system. In this process, all the important variables that affect the direct contact heat transfer between these two fluids were incorporated into the simulation model to evaluate thermal performance of the system. Experiments were performed on an ice slurry generator using water and an immiscible liquid coolant, Fluroinert FC-84. The coolant at about −10°C to −15°C was delivered to the top of the ice slurry generator containing water and collected from the bottom for recirculation. The measured temperature profiles of water in the ice slurry generator for different coolant flow rates (8 lit/min to 12 lit/min) showed a good agreement with those temperature profiles obtained from the simulation model. These results validated the simulation model developed for the ice slurry generator. The analysis showed that during sensible cooling, the estimated heat transfer coefficients between water and the coolant were in the range of 3.0 to 6.5 kW/m2 for coolant flow rates varying from 8 lit/min to 12 lit/min. Higher coolant flow rates also enhanced the ice formation process due to the increased heat transfer rate. In addition, it was also observed that the ice production increased significantly when the nozzle was placed at the bottom of the ice slurry generator.

Direct contact heat transfer with change of phase

1970 ◽  
Vol 13 (6) ◽  
pp. 945-956 ◽  
Author(s):  
M Bentwich ◽  
U Landau ◽  
S Sideman
Keyword(s):  
Heat Transfer ◽  
Direct Contact ◽  
Contact Heat ◽  
Contact Heat Transfer

Complexity evolution quantification of bubble pattern in a gas-liquid mixing system for direct-contact heat transfer

2018 ◽  
Vol 138 ◽  
pp. 832-839 ◽  
Author(s):  
Qingtai Xiao ◽  
Kai Yang ◽  
Manman Wu ◽  
Jianxin Pan ◽  
Jianxin Xu ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Direct Contact ◽  
Contact Heat ◽  
Contact Heat Transfer ◽  
Liquid Mixing
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