Experimental study of multi-scale heat transfer characteristics at pool boiling

Eurotherm Seminar No 108 - Nanoscale and Microscale Heat Transfer V

Serdyukov, V.^1 ; Surtaev, A.^1

Kutateladze Institute of Thermophysics, 1 Acad. Lavrentiev Ave., Novosibirsk, Russia^1

关键词: Experimental investigations;    Heat transfer characteristics;    Heater surface temperature;    Integral characteristics;    Nucleation frequencies;    Nucleation site density;    Synchronized measurement;    Temporal characteristics;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/785/1/012007/pdf
DOI  :  10.1088/1742-6596/785/1/012007

来源: IOP

【 摘 要 】

This study presents the results of the experimental investigation of local and integral characteristics of heat transfer at liquid pool boiling. Saturated ethanol and water were used as the working fluids. Thin, resistively heated indium-tin oxide films deposited onto the sapphire substrates were used as the heaters. The synchronized measurements of the heater surface temperature field and dynamics of vapor bubbles were performed by high-speed infrared thermography with the frame rate of 1000 fps and resolution of up to 0.13 μm/px and high-speed video recording. In this paper new data on major local boiling characteristics, such as nucleation site density, dynamics of vapor bubbles, temporal characteristics and nucleation frequency at different heat fluxes and superheating and their comparison with correlations are presented.