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Report No.
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Measurement of surface heat flux and surface temperature in nucleate pool boiling using micro-thermocouples

Liu, W.; Takase, Kazuyuki

A measurement system for surface temperature and surface heat flux was developed to study heat transfer mechanism in boiling process. The system was consisted by two parts: (1) inner block temperatures were measured using micro-thermocouples set at two layers inside heating block; (2) with using the measured temperatures, inverse heat transfer analysis was performed to get surface heat flux and surface temperature. For the inner block temperature measurement, special T-type micro thermocouples with a common positive pole were developed. The developed system was used to research the change of surface heat flux and surface temperature in a boiling process. The experiments showed the developed special T-type micro thermocouples could trace temperature change in boiling process successfully. Increase in surface heat flux with the generation of big bubble was derived successfully.

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