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 107 for “"heat transfer characteristics"”.
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Pool boiling heat transfer characteristics of nanofluids
… 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 use nucleate …
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Experimental evaluation of heat transfer characteristics of silica nanofluid
The laminar convective heat transfer characteristics were investigated for silica nanofluid. An experimental loop was built to obtain heat transfer coefficients for single-phase nanofluids in a circular conduit in laminar flow regime. Thermal conductivity and viscosity measurements were conducted …
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Boiling heat transfer characteristics of steam generator U-tube fouling
The boiling heat transfer characteristics of steam generator u-tube fouling deposits were identified by developing a boiling heat transfer model and determining its accuracy through the comparison of calculated and experimental results. Magnetite deposits were fabricated in the laboratory and were …
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Flow and heat transfer characteristics of turbulent swirling impinging jets [thesis]
… rely on impinging jets to impart convective heat and mass transfer in processes ranging from the cooling of electronic devices and gas turbine blades to drying of paper and food products. Conventionally, non-swirling impinging jets have been employed, but some studies have shown that inducing …
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Determination and Simulation of the Heat Transfer Characteristics of Electronic Assemblies
… have been developed whereby the three heat transfer mechanisms namely conduction, convection and radiation may be modelled. Models have also been proposed which allow the more important sections of a thermal structure to be analysed in finer detail. These procedures have been used hi …
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Hydrodynamics and Transient Heat Transfer Characteristics in Fluidized and Spouted Beds
Hydrodynamics and heat transfer characteristics found in fluidization were studied in a small scale laboratory fluidized bed. Experiments were designed to capture field data on multiple slit jet gas distributor systems for the validation of computational models. Localized data was quantified …
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Aerodynamic performance and heat transfer characteristics of high pressure ratio transonic turbines.
Thesis. 1976. Sc.D.--Massachusetts Institute of Technology. Dept. of Aeronautics and Astronautics.
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Heat Transfer Characteristics of Natural Convection within an Enclosure Using Liquid Cooling System.
… to study the coupling between natural convection heat transfer within an enclosure and forced convection through computer covering case to cool the electronic chip. Two working fluids are used (water and air) within a rectangular enclosure and the air flow through the computer case is created by …
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The Effect Of Colloidal Stability On The Heat Transfer Characteristics Of Nanosilica Dispersed Fluids
… fluids has shown marked improvement in the heat transfer capabilities. Nanofluids, liquids that contain dispersed nanoparticles, are an emerging class of fluids that have great potential in many applications. There is a need to understand the fundamental behavior of nano dispersed particles …
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Local instantaneous convective heat transfer characteristics from mechanical and supply pulsed radial reattaching nozzles
The heat transfer characteristics of combined mechanically and supply pulsated radial reattaching, CPRJR, nozzles were documented as a function of nozzle exit angle (0° and 20°), non-dimensional gap height (0.05 and 0.13), non-dimensional flow guide height (0.8 and 1.16), mechanical pulsation rate …
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Plenum-to-plenum heat transfer characteristics under natural circulation in a scaled-down prismatic modular reactor
… (S&T) has developed a natural convection heat transfer test facility with one riser and one downcomer between two plena to investigate loss of flow accident scenario (LOFA) for a prismatic very high temperature reactor (VHTR). Using advanced heat transfer coefficient probe and …
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Study Of Heat Transfer Characteristics Of Impinging Air Jet Using Pressure Andn Temperature Sensitive Luminescent Paint
… for a fundamental study on jet impingement heat transfer. First, Uni-Coat TSP and Binary-FIB PSP purchased from ISSI Inc. are calibrated to high accuracy. The calibration uncertainty of TSP and PSP are found to be ±0.93 °C and ±0.12 psi over temperature and pressure ranges …
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Modelling and multi-objective optimisation of heat transfer characteristics and pressure drop of nanofluids in microtubes
… of components in electronics, an increase in heat has become a notable problem. With conventional heat transfer fluids not being able to handle the required heat removal rates, research into fluid enhancing has been of great interest. A nanofluid is a fluid with enhanced heat transfer …
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Experimental investigation of heat transfer characteristics of MITR-II fuel plates, in-channel thermocouple response and calibration.
Thesis. 1976. M.S.--Massachusetts Institute of Technology. Dept. of Nuclear Engineering.
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Thin Stillage Fractionation to Improve Water Recycling Rates and Heat Transfer Characteristics in the Corn Dry Grind Process
We considered application of optimization to the design and operation of a continuous microfiltration (MF) system for the corn dry grind process. Total area requirement decreased with number of stages but there was tradeoff between higher capital costs involved at higher number of stages. Optimal …
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The determination of heat transfer characteristics for the improved design of a heat exchanger for a moving bed system composed of air and activated carbon
… basic importance for successful operation is the heating of the adsorbent to obtain desorption. Considerable difficulty in achieving this transfer of heat is encountered because of the non-conducting nature of the adsorbent. The purpose of this investigation was to determine the heat transfer …
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Design and Characterization of a High pressure Flow Loop for Heat Transfer Experiments of Supercritical Carbon Dioxide
… carbon dioxide (sCO2) sees heightened heat transfer characteristics near its critical point due to its drastically changing thermophysical properties. Conventional single phase heat transfer theory was not developed to capture this nonlinear variation in properties and cannot predict …
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Heat Transfer and Thermal Process Design in Scraped-Surface Heat Exchangers
Performance and heat transfer characteristics of a scraped-surface heat exchanger (SSHE) for use in ultra-high temperature processing of low-acid liquid foods was evaluated using a Contherm 6 x 2 pilot-scale unit. Independent variables tested were steam pressure, blades rotational speed, inlet
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Forced Convection in Microchannels with Nanostructures on One Wall
… and as a result, need to dissipate higher heat fluxes. Active cooling is the only possible method of thermal management for these devices. A new type of microchannel heat sink has been developed and evaluated in this study. The device consists of silicon microchannels on whose bottom …
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