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RISWetting & Wicking Effects of Superhydrophilic Nano Structured Coatings
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Superhydrophilic NanoStructured Coatings (SHNC) were discovered during pool boiling experiments using nanofluids with alumina nanoparticles. During nucleate boiling, the nanoparticles are deposited on the heater surface, ...
Drop Impact Variation at the Extremes of Wettability
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Depicted are sequences of water drop impacts on copper, taken at 16,000 fps. The copper is treated with a heated alkali solution, resulting in a highly wetting, nanoscale structured, cupric oxide layer with a static contact ...
Pool Boiling Heat Transfer of Borated (H3BO3) Water on a Nanoporous Surface
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: With regard to potential application in pressurized water reactors (PWRs), a nanoporous heated surface was tested in pool boiling of an aqueous solution of boric acid (H3BO3), or borated water (1% volume concentration). ...
Flow Visualization inside Thermosyphon for Measuring Heat Transfer Limit
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Heat pipe is a highly effective passive heat transfer device using phase change within small temperature difference. It is noted that heat pipe should be operated under heat transfer limit for practical heat pipe heat ...
Orientation Effects on Pool Boling of Microporous Coating in Water
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Copper HTCMC (High-temperature, Thermally Conductive Microporous Coating) with a coating thickness of ~300 µm was created by sintering 67 µm copper particles onto a flat copper surface. This was shown to be the optimum ...
Nucleate Boiling Comparison between Teflon-Coated Plain Copper and Cu-HTCMC in Water
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The hydrophobic, Teflon-coated surfaces on plain copper and Cu-HTCMC (High temperature Thermally Conductive Microporous Coating) compared on pool boiling heat transfer of water. The HTCMC was created by sintering of copper ...
Bubble Behavior in Pool Boiling Heat Transfer between Two Plates with a Narrow Gap
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The pool boiling phenomena, which may occur at high heat flux in the planar heat pipe such as vapor chamber and thermal ground plane (TGP), were visually investigated in the vertical orientation by capturing the bubble ...
Microporous Coatings to Maximize Pool Boiling Heat Transfer of Saturated R 123 and Water
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The present research is an experimental study for the enhancement of boiling heat transfer using microporous coatings. Two types of coatings are investigated: one that is bonded using epoxy and the other by soldering. ...
Effect of Wettability on Pool Boiling Incipience in Saturated Water
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Three different copper surfaces bare, Al2O3 nanocoated, and Polytetrafluoroethylene (PTFE) coated are prepared and tested to examine the effect of wettability on the pool boiling incipience in saturated water at 1 atm. A ...
Pool Boiling Heat Transfer Enhancement of Water Using Brazed Copper Microporous Coatings
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A novel, hightemperature, thermally conductive, microporous coating (HTCMC) is developed by brazing copper particles onto a copper surface. This coating is more durable than many previous microporous coatings and also ...