Index Catalog // ScholarsArchive@OSU

Experimental investigation of supercritical heat transfer of carbon dioxide in parallel square microchannels with a single-wall constant heat flux boundary condition

Creator:: Zada, Kyle R.
Abstract:: In the vicinity of the pseudocritical point, supercritical carbon dioxide (sCO₂) undergoes a steep change in properties from “liquid-like” to “gas-like” as it is heated at a constant pressure. At the same time, there is a large spike in specific heat which can yield high heat transfer coefficients and heat...
Resource Type:: Masters Thesis
Full Text:: heat flux calculated for a testing case of 20 W cm-2 heat flux, 500 kg m-2 s-1 mass flux, and 1.1

An investigation of the feasibility of a process-intensified differential temperature water-gas shift reactor with integrated Pt/Al2O3 catalyst

Creator:: Hu, Kathy Q.
Abstract:: There has been serious interest in hydrogen as a source of energy in the United States due to its capability of delivering a sustainable, carbon-free energy future. Currently, most hydrogen in the United States is produced via the steam methane reforming of natural gas, which converts methane to hydrogen through...
Resource Type:: Masters Thesis
Full Text:: Investigation of the Feasibility of a Process-Intensified Differential Temperature Water-Gas Shift Reactor with

Investigation of Seasonal Performance of a Membrane Heat Pump System in Different Climate Regions

Creator:: Bukshaisha, Ahmad A.
Abstract:: Membrane based heat pumps systems have attracted the attention of many research groups as a potentially more environmentally friendly alternative to vapor compression systems that are being used for space cooling in 90\% of the buildings in the United States. Several prototypes systems have been developed, with reported claims of...
Resource Type:: Masters Thesis
Full Text:: O f P e rf o rm a n c e ( -) 30 40 50 60 70 80 90 100 110 120 M e m b ra n e D

Evaluation of the predictive capability of two-phase flow maps for microchannel condensation of R-134a at low mass flux conditions

Creator:: VanderPutten, Michael A.
Abstract:: Predicting condensation flow regimes and the associated heat transfer and pressure drop in microchannels is critical for designing terrestrial and space systems for heating, cooling, power generation, and advanced manufacturing. It is well established that in flows approaching the microscale (Dh < 1 mm) gravity-dominated flow regimes become less relevant,...
Resource Type:: Masters Thesis
Full Text:: 80 to 150 kg-m-2-s-1 in square microchannels (Dh = 840 μm) at quality ranging from 0.01 to 0.60. A

Investigation of In-tube Non-equilibrium Condensation of Low Global Warming Potential Refrigerants

Creator:: Jacob, Tabeel A.
Abstract:: This work investigates the in-tube condensation of low global warming potential (GWP) zeotropic refrigerant mixtures R448A, R450A, R452A, R454B and R454C. These refrigerants have been proposed for a wide range of commercial heating, ventilation, air-conditioning applications, but their heat and momentum transport phenomenon were not well understood. Thus, in this...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE DISSERTATION OF Tabeel A. Jacob for

Turbulent Heat Transfer of Supercritical Carbon Dioxide in the Proximity of the Pseudo-Critical Point with Non-Uniform Heat Flux Boundary Conditions

Creator:: Jajja, Saad A.
Abstract:: Seven decades of supercritical heat transfer research have not seen an attempt to characterize turbulent thermal transport in internal flows subject to asymmetric heating. Existing heat transfer models therefore do not account for phenomena that dictates thermal transport, in the proximity of the pseudo-critical point, for non-uniform heating. Additionally, past...
Resource Type:: Dissertation
Full Text:: results for PR = 1.1, G = 500 kg m -2s-1, T in = 20oC and q ′′ = 20 W cm-2.(a) Fluid temperature profile

Characterization of flow boiling in a fractal–like branching microchannel network

Creator:: Edward, Lee M.
Abstract:: Based on experimental investigations the present study evaluates flow instability and void fraction in a fractal-like branching microchannel network with rectangular cross-section. The hydraulic diameter of the channels ranged from 308μm at the inlet to 143μm at the outlet. The flow network used is characterized by set branching ratios for...
Resource Type:: Masters Thesis
Full Text:: Characterization of Flow Boiling in a Fractal–Like Branching Microchannel Network by Lee M. Edward A

Effect of Active Trailing Edge Motion Upon Airfoil Energy Harvester

Creator:: Strahl, Jordan D.
Abstract:: The application of a flapping foil with prescribed trailing edge motion to energy harvesting in a low reduced frequency (k = fc/U∞) regime was experimentally studied. The effects of the phase and amplitude of the applied trailing edge motion upon time-variant power extraction capability have been measured and are interpreted....
Resource Type:: Masters Thesis
Full Text:: 1.8 Hz. With a foil chord length of 0.15 m, the corresponding Reynolds number range is 27, 000 ≤ Rec

The Feasibility of Process Intensification of the Water-Gas Shift Reaction using Differential Temperature Microreactors

Creator:: Tolley, Thomas E.
Abstract:: Hydrogen is an increasingly attractive low-carbon energy carrier for a variety of stationary and mobile applications. Currently, the vast majority of hydrogen in the United States is produced via the energy intensive steam reforming of natural gas. The cost and carbon emissions associated with hydrogen production can be reduced by...
Resource Type:: Masters Thesis
Full Text:: differential temperature reactor CO conversion profiles for a catalyst thickness of 5× 10−4 m

Transient analysis of a tennis racket using PC-based finite elements and experimental techniques

Creator:: Jenkins, Christopher H. M.
Abstract:: Only very recently has modern technology been applied to the design of the tennis racket. In fact, the tennis player of a few hundred years ago would easily recognize today's racket. Although the literature reveals a surprising number of studies on racket mechanics, little work has been reported on the...
Resource Type:: Masters Thesis
Full Text:: of a Tennis Racket Using PC-based Finite Elements and Experimental Techniques by Christopher H. M

Computer and heating and air conditioning

Creator:: Hafez, Ghassan M. Ihsan
Abstract:: The repetitious nature of air conditioning calculation leads to arithmetic errors and a high cost of designing air conditioning systems. Short cut calculations are employed to limit the calculation and the chance of making errors. Computers with their high speed of calculation and the ability to make limited "logic's decisions...
Resource Type:: Masters Thesis
Full Text:: conventional method. Computer and Heating and Air Conditioning by Ghassan M. Ihsan Hafez A THESIS

Experimental Validation of the Hydrodynamic Coefficients for an Oscillating Water Column Wave Energy Converter

Creator:: Bentivoglio, Marine M. J.
Abstract:: Resulting from the action of wind over open water surfaces, water waves contain colossal amounts of energy that has not yet been harnessed. Seen as a very promising source for renewable energy generation, many studies have tried to make wave energy a cost competitive source by investigating optimal designs of...
Resource Type:: Masters Thesis
Full Text:: Marine M. J. Bentivoglio A THESIS submitted to Oregon State

Structure and Actuation of Cephalopod-Inspired Soft Robots

Creator:: Olson, Gina M.
Abstract:: Cephalopod-inspired soft robot arms have been studied as a new type of manipulator. These arms have been proposed for reach and grab tasks, underwater locomotion via swimming and walking, and robotic surgery. However, the capabilities of existing soft arms are limited to simple motions and light loads. Arm design has...
Resource Type:: Dissertation
Full Text:: Reserved Structure and Actuation of Cephalopod-Inspired Soft Robots by Gina M. Olson A DISSERTATION

Student Club Analysis: The Effects of Organizational Structuring on Competition Performance

Creator:: Chandler, Jacob J.
Abstract:: This thesis aims to explore the effects of organizational and management principles within the context of a student club – an international Formula Student team. Research on the effects of organizational structuring on student club performance tends to be qualitative in nature. While considering the inherent complexity of the human...
Resource Type:: Masters Thesis
Full Text:: times according to William M Feld [48]. For organizational structuring, a designer who minimizes the

Advancing Wind Systems Design through Optimization and Improved Modeling

Creator:: Miller, Annalise M.
Abstract:: Wind energy plays an important and growing role in the US energy profile. While other countries have expanded their wind industries into offshore development, large investment costs have hindered progress in the US offshore market despite the larger and more consistent resource available offshore. In this research, I explore the...
Resource Type:: Masters Thesis
Full Text:: operations and main- tenance (O&M) costs that can be prohibitive. Therefore, reducing the cost of a floating

Computational modeling of Lorentz force induced mixing in alkali seeded diffusion flames

Creator:: Thompson, Jon Ira
Abstract:: Lorentz forces provide a unique method for the control and mixing of gas flows without the physical intrusion of objects into the flow. Lorentz forces arise when an electric current is passed through a volume in the presence of a magnetic field. The interaction between the electric current and the...
Resource Type:: Masters Thesis
Full Text:: A. Pattee Lorentz forces provide a unique method for the control and mixing of gas flows without

Data-Driven Numerical Modelling of an Oscillating Water Column from Physical Tank Testing Data

Creator:: McKee, Aisha I.
Abstract:: Wave Energy Converters (WEC) have great potential to help meet global energy demands, but even a single device can be challenging to model. Although most WEC concepts are modelled, many have been simplified with assumptions that do not accurately capture the true dynamics of the system. For this reason, data-driven...
Resource Type:: Masters Thesis
Full Text:: data, and the M function is a linear or nonlinear approximation of the system [18]. Assessing the

Computer simulation of a combined-cycle biomass-fueled power plant

Creator:: Fox, Stephen John
Abstract:: This thesis presents thermodynamic evaluations of various biomass-fueled combined-cycle power plants using a computer model developed for simulating such plants. The combined-cycle systems Investigated are characterized by having a wood-fueled combustor, an indirect-fired gas turbine, and a steam cycle. This work was part of a larger biomass energy project at...
Resource Type:: Masters Thesis
Full Text:: . Dr. Gordon M. Reistad has introduced me to several quality projects, both as an undergraduate and a

Analysis of a wood-fueled trimburner system for use in a combined-cycle, wood-fired power plant

Creator:: Stephenson, Jerry D.
Abstract:: This report investigates the use of wood to fuel a trimburner incorporated in a combined-cycle, biomass-fired power plant. The term "trimburner" applies to a ductburner which is designed to boost the temperature of the air stream entering the gas turbine. The work presented here is part of a larger biomass...
Resource Type:: Masters Thesis
Full Text:: Privacy Abstract approved: Gordon M. Reistad This report investigates the use of wood to fuel a

Predicting Properties of Bio-jet Fuels using Machine Learning and ATR-FTIR Spectroscopy

Creator:: Mayer, Morgan A.
Abstract:: High-potential molecules derived from biomass sources may suitably replace or supplement traditional nonrenewable hydrocarbon fuels to reduce pollution and fuel processing costs. Due to expensive and time-consuming property testing, models that predict key properties from optical data would initially vet potential additives before investment and bench-scale testing. Attenuated Total Reflection...
Resource Type:: Masters Thesis
Full Text:: (ATR) FTIR spectroscopy can provide a fast and inexpensive fingerprint of a liquid fuel to predict

Search Constraints

Search Results

Limit your search