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Showing 1 to 20 of 24 for “"Horizontal tube"”.
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Heat transfer between a shallow fluidized bed and a single horizontal tube immersed in the bed
The heat transfer coefficient between a horizontal tube and a shallow fluidized bed of alumina particles (335-1261 micron) was measured, and the effects of the tube elevation (10-40 mm), static bed height (10-40 mm), and the design of the distributor were investigated. The cloud zone effect i.e. a …
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An experimental study of heat transfer film coefficients for turbulent flow of water at the inlet of a horizontal tube
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1958.
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Experimental Study of Capillary-Assisted Solution Wetting And Heat Transfer Using A Micro-Scale, Porous-Layer Coating On Horizontal-Tube, Falling-Film Heat Exchanger
The horizontal-tube falling-film heat exchangers have many different applications ranging from large refrigeration systems to desalination due to their high heat transfer coefficients with low liquid inventory. However, the problem of partial solution wetting severely deteriorates the heat transfer …
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Experimental Study of Meniscus Thin-Film Evaporation in a Horizontal-Tube, Falling-Film Heat Exchanger, Focusing on Dynamic Contact Angle Variation of an Advancing Meniscus
… evaporation, specifically focusing on a horizontal-tube, falling-film heat exchanger. Experiments were carried out investigating the effects of solution subcooling, evaporator wall superheat, and porous-layer coating on the portions of sensible and evaporation heat transfer in a …
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An investigation of droplets and films falling over horizontal tubes
<p>Liquid films falling over horizontal-tube banks are frequently utilized in absorption heat pumps, heat-driven systems that provide an environmentally and economically attractive alternative to conventional CFC-based vapor compression cycles in certain applications. The widespread application of …
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Condensation of a vapor in the presence of a non-condensing gas
… convection heat transfer, The results on a horizontal tube for other systems are in substantial agreement with the correlation.
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The intertube falling-film modes: Transition, hysteresis, and effect on heat transfer
Horizontal-tube falling-film heat exchangers enjoy wide application because they offer superior thermal performance and operate with less fluid charge than conventional shell-and-tube or flooded heat exchangers. Recent developments vitiate the heuristic design approach of the past, and a clearer …
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The determination of a water film coefficient and a condensing steam film coefficient for a single tube heat exchanger
… condensing steam film coefficients for a single tube heat exchanger. A shell and tube apparatus was constructed and these coefficients were determined by Wilsons graphical method. Test runs were made at various pressures and water velocities. It was determined that for flow through a horizontal …
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Condensing heat transfer within horizontal tubes
… coefficient of a vapor condensing within a horizontal tube. Condensing heat transfer coefficients for propane were measured over a wide range of conditions. The data would not correlate using the existing equations for condensation. A new mechanism was postulated of a laminar condensate …
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Oil Retention and Pressure Drop in Horizontal and Vertical Suction Lines with R410A / POE ISO 32
… the pressure drop and mass of oil retained in horizontal and vertical suction lines. The bulk vapor velocity and overall void fraction are determined from direct mass and temperature measurements. The oil retention, pressure drop, and flow regimes near the minimum ASHRAE recommended mass flux …
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An evaluation of the entrance requirements at Radford College
The heat transfer coefficient between a horizontal tube and a shallow fluidized bed of alumina particles (335-1261 micron) was measured, and the effects of the tube elevation (10-40 mm), static bed height (10-40 mm), and the design of the distributor were investigated. The cloud zone effect i.e. a …
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Experimental and theoretical investigation of transport phenomena in nanoparticle colloids (nanofluids)
… pressure losses in an isothermal and heated horizontal tube; and finally to determine the feasibility for potential use as enhanced coolants in energy transport systems, with focus on nuclear application. The efforts result in proving that the two selected nanofluids, alumina in water and …
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The use of silicone resins as non-wetting files on heating surfaces
… resistance of 1.5” o.d. mild steel evaporator tubes, 12 B.W.G. was investigated. Preliminary tests were made with silicone resins D.C. 801, 993 and G.E. 9975, 9982, 9989 to select the resin to use in the above tests and to develop a precoating treatment for the evaporator tubes. The evaporator …
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Bed dynamics and heat transfer in shallow vibrated particulate beds
… appearing during the bed's free flight drive a horizontal component of particle circulation from the vessel's side walls toward its center. An apparent viscosity of the bed, estimated crudely by pulling a rod through it, influences this component's velocity. In beds of large particles, …
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Benchmarking of a sCO2 Heat Exchanger Flow Loop
… by commissioning a sCO2 flow loop featuring a horizontal tube-in-tube counterflow heat exchanger with a circular cross section. The main objective was to establish experimental heat transfer research capabilities for sCO2 at Embry-Riddle Aeronautical University’s (ERAU) Thermal Science Lab. …
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Heat transfer and scale resisting properties of silicone resins
The effects of silicone coated heat-exchanger tubes on the water film coefficient of heat transfer and on the formation of gypsum seals were studied. The heat-exchanger tubes consisted of 74 ½-in. sections of 1-in. Nominal diameter standard iron pipe into whose surface were installed six …
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The formation of carbon nanofibers and thin films from the catalytic decomposition of ethylene by palladium
… or hydrogen are flowed through a single-zone, horizontal tube furnace at atmospheric pressure and temperatures typically from 550-700°C. The addition of a secondary gas such as oxygen or hydrogen is vital in driving the deposition. Although both gases improve deposition, the manner in which …
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Development and validation of a thermodynamic model for predicting mode transitions in falling film flows over horizontal tubes
Horizontal-tube, falling-film heat and mass exchangers are important to many industries, with example applications in thermal desalination, vapor compression machines, absorption chillers, and natural gas liquefaction. Falling-film heat and mass exchangers are attractive for these applications …
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Parallel implementation and application of particle scale heat transfer in the Discrete Element Method
… as in a fluidized bed equipped with a single horizontal tube heat exchanger. Two cases, one with mono-disperse 2 mm particles rotating at 20 RPM and another with a poly-disperse distribution ranging from 1-2.8 mm and rotating at 1 RPM are investigated. It is shown that heat transfer to the …
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