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 15 of 15 for “"Local Heat Transfer Coefficient."”.
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Local heat transfer coefficient in a baffled shell and tube heat exchanger
Local shell side coefficient measurements in the end conpartments of a model shell and tube heat exchanger have been made using an electrochemical technique. Limited data are also reported far the second compartment. The end compartment average coefficients have been found to be smaller than …
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CFD in support of development and optimization of the MIT LEU fuel element design
… Dynamics. Coupled conduction and convective heat transfer were modeled for uniform and non-uniform lateral power distributions. It was concluded that, due to conduction, the maximum heat flux ratio on the cladding surface is 1.16, compared to the maximum volumetric power generation ratio of …
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Enhancement of heat transfer coefficient using nanofluids for multi-stage flash desalination (MSF) plant
<p>“The enhancement of thermal conductivity and local heat transfer coefficient, under laminar and turbulent flow regimes, of water-based spherical Al<sub>2</sub>O<sub>3</sub>, CuO, and Fe<sub>2</sub>O<sub>3</sub> nanofluids have been experimentally investigated for the improvement of the thermal …
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Liquid crystal thermography and image processing in heat and fluid flow experiments
… full-field studies of velocity, temperature and heat transfer coefficent-distributions, with their accompanying automatic analysis. Liquid crystals and true-colour image processing have opened some new approaches for heat transfer research and offer satisfactory accuracy and resolution. New and …
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Impact of vertical internals on the hydrodynamics and heat transfer coefficient in a gas-solid fluidized bed
… the impact of the dense vertical immersed heat exchanging tubes on the gas and solids hydrodynamic characteristics, flow regime, pressure drop, and heat transfer in a 0.14 m inside diameter gas-solid fluidized bed column of. Two sizes of vertical internal tube bundles (0.0127 and 0.0254 m) …
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Development and Testing of a Multiplexed Temperature Sensor
… The new sensor also incorporates eight resistive heater elements to provide the heat flux to initiate and sustain boiling. The heaters are capable of delivering up to 100 W/cm^2. This dissertation describes the design and testing of the new temperature sensor and the supporting hardware and …
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Radial parallel plate flow with mechanical agitation
… of global energy consumption. An integrated fan heat sink was designed to help alleviate this issue, and is designed to simultaneously improve heat transfer and efficiency. Current designs chiefly focus on improving heat transfer without concern for overall energy efficiency. The novel heat sink …
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Flow boiling of R134a in vertical mini-diameter tubes
… project devoted to investigate flow boiling heat transfer, pressure drop and flow visualization of R134a in small to mini/micro-diameter tubes. The experimental facility was first designed and constructed by X. Huo (2005) with the contribution of L. Chen (2006). In the present study, the …
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Active heat transfer enhancement in integrated fan heat sinks
… their full performance. The "efficiency" of heat sinks is also becoming more important: cooling of electronics consumes 1% of worldwide electricity use by some estimates. Unfortunately, current cooling technologies often focus on improving heat transfer at the expense of efficiency. The …
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Active heat transfer enhancement in integrated fan heat sinks
… their full performance. The "efficiency" of heat sinks is also becoming more important: cooling of electronics consumes 1% of worldwide electricity use by some estimates. Unfortunately, current cooling technologies often focus on improving heat transfer at the expense of efficiency. The …
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Thermohydraulics and suppression of nucleate boiling in upward two-phase annular flow : probing multiscale physics by innovative diagnostics
… quality increases along the assembly's length as heat is transferred from the fuel rods to the water coolant. Nucleate boiling is the dominant heat transfer mechanism at low and intermediate steam qualities (typical of the bubbly and slug/churn flow regimes), while forced convective evaporation …
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Improved prediction methods for finned tube bundle heat exchangers in crossflow
Previous methods for predicting the heat transfer and pressure drop performance of crossflow heat exchangers with finned tubes have concentrated on developing correlations. These correlations have been based on the researchers observations of what geometric parameters may affect the performance, …
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Simultaneous flow visualization and local heat transfer measurements of two-phase flow in plate heat exchangers
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2024-12-01
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Steam condensation in flattened-tube air-cooled condensers
… of void fraction, pressure drop, capacity and heat transfer coefficient for flattened-tube air-cooled steam condensers with inner dimensions of 216 mm height x 16 mm width. Two lengths of tube are investigated: 10.7 m and 5.7 m. The tubes are steel with brazed wavy aluminum fins of 200 mm …