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Filtering by: DOI 10.1016/j.cag.2012.07.006 Remove constraint DOI: 10.1016/j.cag.2012.07.006 Advisor Fronk, Brian M. Remove constraint Advisor: Fronk, Brian M. Degree Field Mechanical Engineering Remove constraint Degree Field: Mechanical Engineering

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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
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
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
Numerical and Experimental Evaluation of Membrane Based Energy Recovery Ventilator Performance with an Internal Support Structure

Creator:

Armatis, Paul D.

Abstract:

Large amounts of energy are wasted when conditioned air in buildings is exhausted to meet ventilation requirements. There are several technologies to recover some of this energy, including the recent development of membrane based energy recovery ventilators (ERVs). ERVs exchange sensible heat and moisture between incoming fresh and outgoing exhaust...

Resource Type:

Masters Thesis
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
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
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
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
Numbering-up of parallel microchannel arrays to megawatt scale supercritical CO₂ solar thermal receivers

Creator:

Hyder, Matthew B.

Abstract:

Concentrated solar power (CSP) plants have the potential to reduce the reliance on nonrenewable energies such as coal and natural gas and provide 24 hour, renewable electricity. A CSP system consists of a large field of heliostats that concentrate the sunlight on a centralized receiver, in this receiver a working...

Resource Type:

Masters Thesis
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

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Academic Affiliation

Mechanical, Industrial, and Manufacturing Engineering11

Advisor

Fronk, Brian M.[remove]11
Haapala, Karl R.1

Commencement Year

Commencement Year range begin – Commencement Year range end

Current results range from 2017 to 2023

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Committee Member

Gess, Joshua4
Hagen, Chris2
Jovanovic, Goran2
MacCarty, Nordica2
Mason, Ben2
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

Fronk, Brian M.1
Song, Chuankai1

Date

Date range begin – Date range end

Current results range from 2017 to 2023

View distribution

Decade

2020-20296
2010-20195

Degree Field

Mechanical Engineering[remove]11

Degree Level

Master's10
Doctoral1

Degree Name

Master of Science (M.S.)10
Doctor of Philosophy (Ph.D.)1

Language

English [eng]11

License

All rights reserved10
Attribution 4.0 (CC BY 4.0)1

Non-Academic Affiliation

Oregon State University. Graduate School2

Peer Reviewed

No11

Resource Type

Masters Thesis10
Dissertation1

Rights Statement

In Copyright11

Subject

Genetic algorithms1
Heat sinks (Electronics)1
Three-dimensional printing1

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