Index Catalog // ScholarsArchive@OSU

Numerical design of a high-flux microchannel solar receiver

Creator:: Rymal, Charles
Abstract:: This thesis discusses the design of several microchannel solar receiver devices for use in CSP (concentrated solar power) using CFD (computational fluid dynamics) simulations. The goal is to demonstrate that, by taking advantage of the higher heat transfer coefficienct of microchannels, solar receivers can achieve higher efficiency than current receiver...
Resource Type:: Masters Thesis
Full Text:: properties of the fluids. Designs presented range in size from 1 cm2 to 4 cm2 and in heat transfer rates

Local heat transfer rate and bubble dynamics during jet impingement boiling

Creator:: Mani, Preeti
Abstract:: Characterization of local boiling trends, in addition to the typically reported area-averaged trends, is essential for the robust design and implementation of phase change technologies to sensitive heat transfer applications such as electronics cooling. Obtaining the values of heat fluxes corresponding to locally varying surface temperatures has been a challenge...
Resource Type:: Dissertation
Full Text:: electrical filter filtered data fluid fluid 2 4 h heater jet jet l liquid L lift

The local natural convection heat transfer coefficient on a heated horizontal cylinder oscillating in water

Creator:: Martin, Timothy William
Abstract:: An experimental study has been made of the local natural convective heat transfer coefficient around the circumference of a heated horizontal cylinder oscillating vertically in water. The heat transfer surface consisted of a 1 3/8-inch diameter cylinder with a small test section imbedded in its surface. This enabled data to...
Resource Type:: Masters Thesis
Full Text:: -inch, (4) n = 1000 rpm, a = 0. 100 -inch, (5) n = 1500 rpm, a = 0. 0667 -inch, and (6) n = 1500 rpm

An experimental study of flow boiling heat transfer enhancement in minichannels with porous mesh heating wall

Creator:: Wang, Hailei
Abstract:: A unique channel surface enhancement technique via diffusion-bonding a layer of conductive fine wire mesh onto the heating wall was developed and used to experimentally study flow boiling enhancement in parallel microchannels. Each channel was 1000 μm wide and 510 μm high. A dielectric working fluid, HFE 7000, was used...
Resource Type:: Dissertation
Full Text:: quality region. According to the plots of local flow boiling heat transfer coefficient h versus vapor

Comparative methods of determining heat transfer coefficients over moist food materials

Creator:: Su, Ainong
Abstract:: Production of surimi represents a potential utilization of a number of low-valued fish species, one of which, Pacific whiting, represents the largest biomass off the West Coast of the United States. However, a protease enzyme softens the fish flesh in Pacific whiting and limits the expansion of surimi production. Many...
Resource Type:: Masters Thesis
Full Text:: 36 Procedure for h etermination 43 Heat Flux Method 44 Instrumentation 45 Calculation of h 46 4

A thermal hydraulics analysis of a molybdenum production element for implementation in TRIGA reactors

Creator:: Byfield, Patrick
Abstract:: The metastable isotope of technetium-99 (Tc-99m) is an important diagnostic tool used in the field of nuclear medicine due to the isotope's 6.0 hour half-life, 140.5 keV γ-decay mechanism, and multiple oxidation states [1,2]. Approximately 70% of the world’s nuclear medicine procedures involve the use of Tc-99m [3]. The conventional...
Resource Type:: Masters Thesis
Full Text:: h D D D D    ∈ ≤     ∆ =   + ∈ ≥    (2-7) and ( )57 ln 54 15 4 abs

Performance and flow stability characteristics in two-phase confined impinging jets

Creator:: Sabo, Michael D.
Abstract:: Advances in electronics fabrication, coupled with the demand for increased computing power, have driven the demand for innovative cooling solutions to dissipate waste heat generated by these devices. To meet future demands, research and development has focused on robust and stable two-phase heat transfer devices. A confined impinging jet is...
Resource Type:: Masters Thesis
Full Text:: equal to jet height to diameter ratio of H/Dj ≈ 5 [4]. Outside the length of the potential core, the

An experimental investigation of natural convection heat transfer from vertical flat plates in mercury

Creator:: White, Donald Henry
Abstract:: Heat transfer from a vertical flat plate in an infinite pool of mercury was investigated. Velocity profiles were measured with a hot-film anemometer and simultaneous temperature profiles measured with thermocouples in this low Prandtl number liquid metal. Constant heat flux plates at Grashof numbers of 9 x 10⁸ and 4...
Resource Type:: Dissertation
Full Text:: low Prandtl number liquid metal. Constant heat flux plates at Grashof numbers of 9 x 108 and 4 x 107

Effects of orifice geometry and surface boundary condition on heat transfer of impinging jet array

Creator:: Kanokjaruvijit, Koonlaya.
Abstract:: The effects of the orifice geometry and the surface boundary condition on the heat transfer distribution to a flat surface of an impinging jet array were investigated. The jet array impinged normally onto the surface which was either isothermal or had a uniform heat flux. The experiments were performed for...
Resource Type:: Masters Thesis
Full Text:: as Nu = 0.127 Reo.693 Pr°.4(H / DhrH / Dh ~ 4

An experimental study of friction factors and mixed convection in the thermal entrance region of vertically narrow, horizontal rectangular channels for different heating conditions and aspect ratios

Creator:: Hong, Seung-Ho
Abstract:: Heat transfer and fluid mechanical behavior of water flowing horizontally in vertically-narrow rectangular channels was studied in this work. Friction factor and Nusselt number variations were determined experimentally for four different wall heating conditions, and for aspect ratios(height to width) of 5, 4, 3, 2, and 1. Wall heating conditions...
Resource Type:: Dissertation
Full Text:: Thermal experiment b/a 1, 2, 3, 4, and 5 1, 2, 3, 4, and 5 Re 100 - 3500 200-800 Ra 104 2*106 2.3 Flow

ScholarsArchive@OSU

Numerical design of a high-flux microchannel solar receiver

Local heat transfer rate and bubble dynamics during jet impingement boiling

The local natural convection heat transfer coefficient on a heated horizontal cylinder oscillating in water

An experimental study of flow boiling heat transfer enhancement in minichannels with porous mesh heating wall

Comparative methods of determining heat transfer coefficients over moist food materials

A thermal hydraulics analysis of a molybdenum production element for implementation in TRIGA reactors

Performance and flow stability characteristics in two-phase confined impinging jets

An experimental investigation of natural convection heat transfer from vertical flat plates in mercury

Effects of orifice geometry and surface boundary condition on heat transfer of impinging jet array

An experimental study of friction factors and mixed convection in the thermal entrance region of vertically narrow, horizontal rectangular channels for different heating conditions and aspect ratios

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