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Filtering by: Contributor advisor sim Fronk, Brian M. Remove constraint Contributor advisor sim: Fronk, Brian M.

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Development and validation of acoustic measurement techniques for void fraction in concentric annular geometries

Creator:

Tost, Brian C.

Abstract:

This work investigates the acoustic velocity of gas-liquid mixtures in vertical, co-current flow in a concentric annulus. Acoustic velocity shows promise as a detection parameter for the presence and amount of gas in a liquid flow because of its high sensitivity to gas void fraction in a gas-liquid mixture. However,...

Resource Type:

Dissertation
Modeling hop kilning with respect to energy consumption and drying kinetics

Creator:

Thomas, Matthew W.

Abstract:

Currently, little work has been performed studying energy consumption in hop kilning. This thesis explores drying with an alternative drying schedule that extends the initially elevated drying temperature currently used by growers and examines its impact on drying time and energy use. Extending the time of the initially elevated drying...

Resource Type:

Masters Thesis
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
Part-Load Optimization of an Organic Rankine Cycle

Creator:

Ramsey, Owen

Abstract:

Waste-heat-recovery Organic Rankine Cycle (ORC) systems use excess heat from industrial processes to produce electrical power. In many cases, the temperatures and mass flow rates of these excess-heat streams vary significantly over time, causing the ORC to often operate far from its design point. In this study, a control strategy...

Resource Type:

Honors College Thesis
Condensation of a zeotropic mixture, R-454C, and its individual components, R-1234yf and R-32, in microfin tubes

Creator:

Matty, Ethan P.

Abstract:

This work compares the condensation heat transfer and pressure drop for zeotropic refrigerant R-454C and its individual components, R-32 and R-1234yf, in horizontal microfin tubes. One microfin tube has a 4 mm outer diameter, 0.18 mm wall thickness, and a surface area ratio of 1.56. The second tube has a...

Resource Type:

Masters Thesis
Experimental Investigation of Near-Critical Carbon Dioxide in Microchannels for High Flux Cooling Applications

Creator:

Travers, Kristen

Abstract:

With the continued decrease in size and subsequent increase in power of computer processors, thermal management in electronics is becoming more important than ever before. The chip heat densities are reaching new peaks (> 100 W cm-2) that current cooling methods are not able to keep up with. However, some...

Resource Type:

Honors College Thesis
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
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
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
Impacts of Porous Support Geometry on Membrane Performance and Energy Use in the Steam Reforming Process

Creator:

Chamorro, Davis S.

Abstract:

Increasing interest in hydrogen as a clean and efficient energy carrier has driven the need to improve its production and distribution methods. Of particular interest is the natural gas reforming process which currently accounts for 48% of hydrogen production in the United States. Existing natural gas delivery infrastructure and challenges...

Resource Type:

Masters Thesis

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Academic Affiliation

Mechanical, Industrial, and Manufacturing Engineering16

Advisor

Fronk, Brian M.18
Haapala, Karl R.2
Waltrich, Paulo J.1

Commencement Year

Commencement Year range begin – Commencement Year range end

Current results range from 2017 to 2024

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Committee Member

Gess, Joshua6
Blunck, David L.3
Hagen, Chris3
Blunck, David2
Jovanovic, Goran2
more Committee Members »

Creator

Armatis, Paul D.1
Bukshaisha, Ahmad A.1
Chamorro, Davis S.1
Dokken, Connor B.1
Hu, Kathy Q.1
more Creators »

Contributor

Carney, Janine E.1
Fronk, Brian M.1
Song, Chuankai1

Date

Date range begin – Date range end

Current results range from 2017 to 2023

View distribution

Decade

2020-202910
2010-20198

Degree Field

Mechanical Engineering17
Industrial Engineering1

Degree Level

Master's13
Doctoral3
Bachelor's2

Degree Name

Master of Science (M.S.)13
Doctor of Philosophy (Ph.D.)3
Honors Bachelor of Science (H.B.S.)2

Language

English [eng]18

License

All rights reserved16
Attribution 4.0 (CC BY 4.0)1

Non-Academic Affiliation

Oregon State University. Graduate School3
Oregon State University. Honors College2

Peer Reviewed

No18

Resource Type

Masters Thesis13
Dissertation3
Honors College Thesis2

Rights Statement

In Copyright18

Subject

Carbon dioxide1
Genetic algorithms1
Heat -- Transmission1
Heat sinks (Electronics)1
Microreactors1
more Subjects »

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