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Wall Heat Flux Behavior of Nucleate Pool Boiling Under a Constant Temperature Condition in a Binary Mixture System
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 Title & Authors
Wall Heat Flux Behavior of Nucleate Pool Boiling Under a Constant Temperature Condition in a Binary Mixture System
Bae, Sung-Won; Lee, Han-Choon; Kim, Moo-Hwan;
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The objective of this work is to measure space and time resolved wall heat fluxes during nucleate pool boiling of R113/R11 mixtures using a microscale heater array in conjunction with a high speed CCD. The microscale heater array is constructed using VLSI techniques, and consists of 96 serpentine platinum resistance heaters on a transparent quartz substrate. Electronic feedback circuits are used to keep the temperature of each heater at a specified temperature and the variation in heating power required to keep the temperature constant is measured. Heat flux data around an isolated bubble are obtained with triggered CCD images. CCD images are obtained at a rate of 1000frames/second. The heat transfer variation vs. time on the heaters directly around the nucleation site is plotted and correlated with images of the bubble obtainedby using the high speed CCD. For both of the mixture(R11/R113) and pure system(pure R11, pure R113), the wall heat fluxes are presented and compared to find out the qualitative difference between pure and binary mixture nucleate boiling.
Nucleate Boiling;Microscale Heater;Bubble Growth;Binary Mixture;Constant Temperature Condition;
 Cited by
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