Abstract
This data set contains local experimental data of heat flux, wall temperature and void data profiles for vertical subcooled flow boiling of refrigerant Novec 649 at a copper wall. This data article presents average boiling curves from single-phase convection to fully developed film boiling for six combinations of mass flux and subcooling. Void profiles are provided for void fraction, void detection frequency, void velocity and void ligament size for three characteristic states along each boiling curve. Thermocouples were used to measure heat flux and temperature. Optical single fiber and double fiber micro probes were used for obtaining void data profiles. A traversing mechanism was used to position the optical fiber micro probes relative to the heater surface.
Highlights
Local data of heat flux, wall temperature and the void phase along the boiling curve during vertical subcooled flow boiling of refrigerant Novec 649 at a copper wall
Article history: Received 10 July 2018 Received in revised form 1 October 2018 Accepted 26 October 2018 Available online 1 November 2018 abstract. This data set contains local experimental data of heat flux, wall temperature and void data profiles for vertical subcooled flow boiling of refrigerant Novec 649 at a copper wall. This data article presents average boiling curves from single-phase convection to fully developed film boiling for six combinations of mass flux and subcooling
Void profiles are provided for void fraction, void detection frequency, void velocity and void ligament size for three characteristic states along each boiling curve
Summary
For the double fiber probes, the two individual glass fibers are glued together to ensure a fixed distance between the tips of each fiber For both configurations, the measurement apparatus consists of the probe tip, a fiber coupled laser source, a fiber coupler, a photodiode and an amplifier as well as an analog to digital converter running at 60 kHz for each fiber. This allowed for the locally coupled synchronous measurement of heat flux, temperature data and void data. For the purpose of this study, n 1⁄4 30; 000 was used, which for a sample rate of sr 1⁄4 60 kHz equates to an averaging interval of Δti 1⁄4 0:5 s This interval length was chosen to match the acquisition frequency of 2 Hz for temperature data. The calculation of the void data in each interval was done as follows
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