Pool boiling heat transfer is extensively used in various industrial applications such as cooling of reactor cores in nuclear power plants, steam generation in industrial boilers, and cooling of high heat flux generating electronic equipment to efficiently dissipate a large amount of heat by maintaining lower surface temperatures. The maximum heat flux dissipated during pool boiling is limited by the critical heat flux (CHF), a condition at which the entire heater surface gets covered with an insulating vapor layer due to excessive vapor generation and retention on the heater surface. The limited visualization possibility of the boiling surface limits the identification of the impending CHF condition to rely on temperature monitoring alone. The study presented here is focused on developing a method for analyzing and identifying acoustic signatures throughout the nucleate boiling regimes that are indicative of the boiling state of the heater surface. The bubble nucleation and coalescence along with bubble collapse at the liquid-vapor interface leads to variation in acoustic emission patterns during boiling. These sound waves are studied and acoustic signatures that are representative of the impending CHF are identified over the plain copper and enhanced copper substrates with water as the working fluid at an atmospheric pressure.


Effect of Heat Flux and Bubble Coalescence Phenomena on Sound Signatures During Pool Boiling

Division / Sponsors: 
Heat Transfer Division (HTD), Fluids Engineering Division (FED)

Heat Transfer Summer Conference
Paper Proceedings: https://asmedigitalcollection.asme.org/HT/HT2020/volume/83709

18th International Conference on Nanochannels, Microchannels, and Minichannels
Paper Proceedings: https://asmedigitalcollection.asme.org/ICNMM/ICNMM2020/volume/83693

Fluids Engineering Division Summer Meeting
Paper Proceedings: https://asmedigitalcollection.asme.org/FEDSM/FEDSM2020/volume/83716

HT-ICNMM2020 - Virtual Conference, SHTC - Virtual Conference, FEDSM2020 - Virtual Conference

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