Index Catalog // ScholarsArchive@OSU

Three-dimensional, nonlinear viscoelastic analysis of laminated composites : a finite element approach

Creator:: Wang, Min
Abstract:: Polymeric composites exhibit time-dependent behavior, which raises a concern about their long term durability and leads to a viscoelastic study of these materials. Linear viscoelastic analysis has been found to be inadequate because many polymers exhibit nonlinear viscoelastic behavior. Classical laminate theory is commonly used in the study of laminated...
Resource Type:: Dissertation
Full Text:: under tension (viscoelastic response) 71 Figure 5.9 Finite element mesh for a [90/0/-45/45], laminate

Experimental evaluation and numerical modeling of a water source heat pump evaporator

Creator:: Means, Paul Morency
Abstract:: Water source heat pumps are increasingly being used for residential and commercial space heating. Typically, these heat pumps are capable of both heating and cooling, and historically the design emphasis has been on improving the units' cooling performance. Recently, there has been more interest in improving the heating performance, however,...
Resource Type:: Masters Thesis
Full Text:: evaporator temperature; 71 numerical model predictions and experimental results (Model S-3.75 evaporator, see

Processing of laser interferometric signals for small displacement measurements

Creator:: Peng, Gwo-sheng
Abstract:: Algorithms for analyzing laser interferometry signals were developed and adopted to the computer based processing of small displacement measurements. These methods, matrix operation approach and fixed parameters approach, are based on signal phase calculation and are able to replace complex fringe counting electronic circuits. The matrix operation provides an approach...
Resource Type:: Dissertation
Full Text:: signal . . 71 13. Flow chart of fixed parameters approach 75 14. Local error within one signal cycle

Analysis and simulation of dual-source heat pumps with three-fluid evaporators

Creator:: Lee, Jai-hyo
Abstract:: When the ambient temperature drops, air-source heat pumps deliver less heating per unit of power input and usually cannot provide for the heating load. Therefore, dual-source heat pumps can offer an attractive alternative. In the context of this work, a dual-source heat pump operates as an air-source unit under normal...
Resource Type:: Dissertation
Full Text:: Program of Models 3.3.1 Main Program 3.3.2 Subroutines 71 71 73 3.4 Optimization Formulation 75 3.4.1

A study of thermal stratification in the cold legs during the subcooled blowdown phase of a loss of coolant accident in the OSU APEX Thermal Hydraulic Testing Facility

Creator:: Wachs, Daniel M.
Abstract:: The phenomena of interest in this work is the thermal stratification which occurs during the early stages of a loss of coolant accident (LOCA) in the OSU APEX Thermal Hydraulic Test Facility, which is a scaled model of the Westinghouse AP600 nuclear power plant. Thermal stratification has been linked to...
Resource Type:: Masters Thesis
Full Text:: Westinghouse Delta-75 SG. Four Reactor Coolant Pumps (RCPs), two attached to the lower channel head of

Optimization of staged rankine energy conversion cycles for high efficiency

Creator:: Simmons, Larry Dean
Abstract:: Because of the fuel crisis and problems associated with thermal pollution there is new impetus and urgency for developing more efficient energy conversion systems for power generation. A preliminary analysis was undertaken to determine the potential of staged Rankine cycle systems for substantially higher efficiency. It was necessary to optimize...
Resource Type:: Dissertation
Full Text:: / H2O cycles 53 1.1 Univariate search 70 1.2 Gradient technique 71 1.3 Pattern move (with univariate

Computer model for estimating cogeneration system performance and economic feasibility

Creator:: Simonds, John E.
Abstract:: Cogeneration is the simultaneous generation and use of both electricity (or mechanical power) and thermal energy from a single fuel source. It is a technology that has been used for years by industries, commercial institutions, and municipalities that need both heat and electrical power. An analytical approach has been developed...
Resource Type:: Masters Thesis
Full Text:: flow. MTHR = (P x TSR1/71) + NEXT x [1 - (TSR1/TSR2)] (26) The term El - (TSR,/TSR2)] in equation (26

The experimental characterization of membrane behavior in two-phase gas extraction

Creator:: Cappello, Nicholas C.
Abstract:: Understanding the behavior of hydrophobic membranes is important for applications where separating a gas from a liquid-gas mixture is beneficial. For example, in-situ vapor extraction can be used in microscale heat sinks to improve heat transfer and flow stability. In this study, gas is experimentally evaluated flowing through flexible polytetrafluoroethylene...
Resource Type:: Masters Thesis
Full Text:: program of a video of the rotameter output. . . . . 71 5.2 Pressure difference across the membrane

Identification of Physical and Chemical Processes on Ignition and Burning of Live Fuels

Creator:: Fazeli, Hamid
Abstract:: Wildland fire refers to an unpredictable and uncontrollable fire that happens in wildland areas. Regardless of the beneficial impacts of wildland fires on ecosystems, the destructive impacts of wildfires on air quality, economy, public health, etc. are considerable. An essential goal in the fire community is that the wildland fires...
Resource Type:: Masters Thesis

Proportional integral derivative control of an oil-heated fractal-like branching microchannel desorber

Creator:: Davis, Keith R.
Abstract:: A PID controller was designed to control the performance of an oil-heated fractal-like branching microchannel desorber for use in an ammonia-absorption refrigeration system. Both the amount and concentration of ammonia refrigerant generated at the desorber can be controlled by choosing the rectified circulation ratio as the controlled variable in a...
Resource Type:: Masters Thesis
Full Text:: PIDA _ 5.6: Measured tracking results for systems and ............................... 71 EXPTA EXP

ScholarsArchive@OSU

Three-dimensional, nonlinear viscoelastic analysis of laminated composites : a finite element approach

Experimental evaluation and numerical modeling of a water source heat pump evaporator

Processing of laser interferometric signals for small displacement measurements

Analysis and simulation of dual-source heat pumps with three-fluid evaporators

A study of thermal stratification in the cold legs during the subcooled blowdown phase of a loss of coolant accident in the OSU APEX Thermal Hydraulic Testing Facility

Optimization of staged rankine energy conversion cycles for high efficiency

Computer model for estimating cogeneration system performance and economic feasibility

The experimental characterization of membrane behavior in two-phase gas extraction

Identification of Physical and Chemical Processes on Ignition and Burning of Live Fuels

Proportional integral derivative control of an oil-heated fractal-like branching microchannel desorber

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