Date of Award
Master of Science in Engineering
Mechanical and Aeronautical Engineering
Dr. Ho Sung Lee
Dr. Christopher Cho
Dr. Iskender Sahin
Masters Thesis-Open Access
Convective boiling experiments were conducted to show the effects of velocity, pressure, and subcooling on both water and a water-ethylene glycol mixture. Boiling curves were obtained in a 30 mm wide by 20 mm high rectangular channel with an upward facing 20 mm wide by 30 mm long rectangular copper heater. The velocity ranged from 0.5 m/s to 4.0 m/s, the pressure ranged from 1.0 atm to 2.6 atm, and the subcooling ranged from 10°C to 50°C. The curves were generated with measured heat fluxes up to 100W/cm2 . The inlet conditions of temperature, velocity, and pressure were maintained at constant values for each curve while the power to the heater was incrementally increased.
The use of both a pure fluid and a binary mixture showed different responses to the variables of pressure and subcooling. The results of this experiment showed that a binary mixture could not be treated as a pure substance when variations in subcooling and pressure were present. A high-speed camera was also used to allow for visual comparisons of boiling behavior.
O'Neill, Andrew T., "Experimental Determination of Convection Boiling Curves for Water and Ethylene Glycol in a Rectangular Channel with Localized Heating" (2005). Master's Theses. 4880.