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Showing 1 to 20 of 73 for “"Pool boiling"”.
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Molecular dynamic simulation of pool boiling process
… presents molecular dynamic simulation of the pool boiling process of water molecules with heater modelled as lattice of copper atoms. Heat transfer coefficient was calculated, and the results were compared to existing correlations for pool boiling heat transfer. The purpose of the analysis was …
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Pool boiling heat transfer characteristics of nanofluids
… very significant enhancement (up to 200%) of the boiling Critical Heat Flux (CHF) at modest nanoparticle concentrations (50.1% by volume). Since CHF is the upper limit of nucleate boiling, such enhancement offers the potential for major performance improvement in many practical applications that …
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Transient pool boiling of cryogenic liquids on water,
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1974.
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Pool boiling of liquid nitrogen on corrugated surfaces
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1980.
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The mechanism of heat transfer in nucleate pool boiling
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1962.
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Vapor Bubble Detachment in Subcooled Pool Boiling at Zero Gravity
The mechanism of vapor bubble detachment at zero gravity has been studied both analytically and numerically. Instead of analyzing the force balance, this study emphasizes momentum conservation, the time integral of the force. The liquid velocity is derived from the velocity potential. Heat and mass …
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Pool boiling - growth of single bubbles at a heated wall
Experimental and theoretical studies have been carried out on the growth of single bubbles at a wall in a non-uniform temperature field under conditions of zero, positive and negative gravity. Observations of bubble history were made using high speed cine photography whilst simultaneously recording …
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Determination of pool boiling Critical Heat Flux enhancement in nanofluids
… Using an electrically controlled wire heater, pool boiling Critical Heat Flux (CHF) of Alumina and Silica water-based nanofluids of concentration less than or equal to 0.1 percent by volume were measured. Silica nanofluids showed CHF enhancement up to 68% and there seems to be a monotonic …
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Pool boiling of sulfur dioxide from an electrically heated wire
… with an electrically heated wire submerged in a pool of sulfur dioxide liquid. A three-inch 15 Gage Nichrome V wire served as heating element in the boiling process. Electric power consumed by the wire was equal to the amount of heat transferred. Both temperatures of the wire surface and the …
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Characterization of pool boiling heat transfer from porous-coating-enhanced surfaces
… electronic systems. Immersion cooling by boiling is one of the preferred methods for high power density applications, due to its passive nature and high heat transfer coefficients obtained. Pool boiling heat transfer has been extensively studied in recent decades to understand the inherent …
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Enhancement of heat transfer and anti-scaling capabilities for pool boiling
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2024-05-01
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Experiments In Pool Boiling Heat Transfer And Nucleationdynamics Of High Pressure Refrigerants
A high pressure pool boiling experiment of pressurized R134a is designed and built, utilizing thermochromatic liquid crystal techniques. Liquid crystals thermo-chromatography uses encapsulated liquid crystals that are sensitive to temperature. When exposed to hot temperatures the crystal reflect a …
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Design guidelines of laser structured surfaces for enhanced pool boiling heat transfer
Boiling enhancement has emerged as a salient pathway to improve energy efficiency and reduce operating costs. In this work, we strengthen external pool boiling of R-1336mzz(Z) on tube exteriors by optimizing laser texturing recipes. Systematic adjustment of laser parameters enables deterministic …
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The effect of surface conditions on nucleate pool boiling heat transfer to sodium.
Massachusetts Institute of Technology. Dept. of Nuclear Engineering. Thesis. 1965. Sc.D.
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Enhancement of Pool Boiling Heat Transfer by Brazed Aluminum Microporous Coating in Saturated Water
Surface treatment is an effective way to enhance pooling boiling heat transfer. It improves the critical heat flux (CHF) and/or the nucleate boiling heat transfer (NBHT). Surface treatment is developed in this experimental work by adding an aluminum microporous coating onto an aluminum surface. …
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Combined effect of electric field and surface modification on pool boiling of R-123
… uniform) acting separately or in combination on pool boiling of R-123 is presented in this thesis. The effect of surface modification was investigated on saturated pool boiling of R-123 for five horizontal copper surfaces modified by different treatments, namely: an emery polished surface, a fine …
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Mechanistic Understanding and Enhancing Pool Boiling Heat Transfer via Surface Property and Structure Design
Boiling is a vital process used to transfer heat effectively via harnessing the large latent heat of vaporization for a variety of energy and thermal management applications. The boiling heat transfer performance is described mainly by critical heat flux (CHF) and heat transfer coefficient (HTC), …
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High-Resolution Experimental Measurements and Mechanistic Modelling of Saturated Cryogenic Pool Boiling Heat Transfer
… e.g., a fuel depot placed in orbit. The low boiling point of cryogenic fuels (hydrogen, methane, oxygen) makes them prone to boil when transferred through superheated pipes, or simply stored in fuel tanks, resulting in the presence of two-phase mixture. Boil-off gas can lead to pressurization …
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