Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 66 for “"flow distribution"”.
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Flow distribution in brazed plate heat exchangers
… coefficient. However, they suffer from the flow maldistribution among parallel plate channels. Especially when they are used as evaporators, the non-uniform distribution of two-phase refrigerant creates an unwanted superheated region, which has a lower heat transfer coefficient and a smaller …
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Further studies on flow distribution on distillation sieve trays
… baffles in conventional distillation trays as flow straightening devices, with the view of enhancing tray efficiency. The mode of operation is based on deflecting part of the liquid momentum from the centre of the tray to the segment regions in order to drive stagnating liquid at the edges …
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Critical Node Analysis for Water Distribution System Using Flow Distribution
<p>The expansive nature of water distribution system makes them susceptible to threats such as natural disasters and man-made destructions. Vulnerability assessment research efforts have increased since the passing of “Bioterrorism Preparedness and Response Act” in 2002 to harden WDS. This study …
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Refrigerant flow distribution in vertical headers of reversible microchannel heat exchangers
… it functions as an evaporator and refrigerant maldistribution among parallel microchannel tubes creates unwanted superheated region, which lowers the heat transfer between refrigerant and air. This thesis presents the experimental and modeling study of refrigerant distribution in the vertical …
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Two phase flow distribution in parallel flow heat exchangers -- experimentally verified model
Maldistribution of refrigerant is a problem in parallel microchannel heat exchangers that lowers their potential effectiveness, especially when controlled by superheat. This paper describes modeling and numerical simulation of two phase mass flow distribution in a microchannel evaporator, on the …
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Design of test apparatus to analyze two-phase refrigerant flow distribution for furnace coil applications
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1994.
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Friction pressure drop measurements and flow distribution analysis for LEU conversion study of MIT Research Reactor
… coefficient in both laminar and turbulent flow regions, and to develop empirical correlations for the finned rectangular coolant channels for the safety analysis of the MITR. A friction pressure drop experiment is set-up at the MIT Nuclear Reactor Laboratory, where static differential …
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Effects of blade configuration on flow distribution and power output of a zephyr vertical axis wind turbine.
… software are presented to predict the fluid flow through a novel Zephyr vertical axis wind turbine(VAWT). Simulations of air flow through the turbine rotor were performed to analyze the performance characteristics of the device. Major blade geometries were examined. A multiple reference frame …
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Developing two-phase flow after an expansion valve and the effect of flow patterns on two-phase flow distribution
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2024-08-01
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Analysis of Flow and Heat Transfer in the U.S. EPR Heavy Reflector
… radiation, and this heat is removed by the water flowing through 832 cooling channels drilled through the heavy reflector. In this project, the temperature distribution in the heavy reflector was investigated to ascertain that the maximum temperature does not exceed the allowable temperature of …
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Investigating the Impact of Aquifer Long Term Replenishment on the Potomac Aquifer System in Virginia
… of an ALTR project. Quantifying how flow moves through the multi-layered system is necessary to communicate travel times and water quality impacts on the aquifer system. This work uses injectate as an intrinsic tracer, an in-situ flowmeter, and a bromide tracer test to evaluate how …
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Two phase flow splitting in piping branches
… research are to evaluate the performance of a flow-splitting tripod, discover the factors which most affect the flow distribution; and quantify the effects of geometry, quality and flow rate on the distribution. Knowing all this allows one to predict the distribution for given conditions. An …
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Experimental hydrodynamic study of the slurry distribution in a vertical slurry heat exchanger
… is oriented vertically with upward slurry flow on the tube side to minimize the localized solid sedimentation in individual tubes. Several experiments were conducted to investigate the effect of particle size, particle concentration, and total flow rate on the slurry distribution and local …
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Hydrodynamics of impinging liquid jets used in cleaning
… jet length and wall curvature were explored. The flow patterns generated by the impingement of a coherent, turbulent, horizontal water jet on a flat, vertical target were characterised as a benchmark and compared with existing models that predict the shape of the radial flow zone (RFZ). As the jet …
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The effect of manufacturing tolerances and header design on heat exchanger effectiveness
… header contour and the angle of the incoming flow as well as the pressure drop through the core have a significant impact on the flow distribution. Small variations in the header dimensions and the core/header aspect ratio have little effect on the effectiveness. Decreasing the angle the …
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Development of a volumetric solar thermal absorber
… concepts are modelled and optimised regarding flow distribution. This approach is novel as former absorber designs lack homogenous flow, or the distribution was optimised experimentally. The simulation results show a more equal flow distribution for the concepts than is the case for the …
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Coolant distribution control in satellite structural panels using electrohydrodynamic conduction pumping
… show promise as a means to actively control the distribution of coolants within a flow network and may be applied to a novel biologically-inspired thermal control system. This experiment characterizes the performance of an EHD pump operating under various flow conditions and demonstrates the …
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Comparison of performance and emission characteristics between ceramic and metallic catalytic converter
… through simulation and experimental in terms of flow distribution and pollutant gases conversion. ANSYS Fluent 16.2 has been used for the simulation process and Mitsubishi 4G93 1800cc gasoline engine with difference speed and 25% constant load were used for the emission measurement using Kane …
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