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Optimization Of The Heat Pumping Capacity Of A Thermoelectric Heat Pump, David A. Heavner
Optimization Of The Heat Pumping Capacity Of A Thermoelectric Heat Pump, David A. Heavner
Theses
A steady state model of a thermoelectric heat pump fitted with pin fin heat exchange surfaces is developed from the equations governing the operation of a thermoelectric device and pressure drop/ heat transfer correlations for staggered tube banks in cross flow. The model computes current draw, heat pumped at the cold side, heat rejected at the hot side, hot and cold side exhaust temperatures, and hot and cold side pin base temperatures when given the following parameters: ambient temperature, thermoelectric geometry factor, number of thermocouple junctions, input voltage, pin diameter, pin height, transverse pin stagger, longitudinal pin stagger, contact resistance …
Analysis Of Nydec Guidelines For Extended Detention Basins: Effectiveness In Water Quality Improvement In Western And Central New York, Karlene Thomas
Analysis Of Nydec Guidelines For Extended Detention Basins: Effectiveness In Water Quality Improvement In Western And Central New York, Karlene Thomas
Theses
The New York State Department of Environmental Conservation (NYDEC) has recently issued guidelines for stormwater management. One widely utilized management practice is the extended detention basin wherein improved water quality is achieved through sedimentation. NYDEC recommends these be designed so that the volume of storm runoff detained is equivalent to the first flush, defined as the first V of runoff or runoff from a 1-year, 24 hour storm event, whichever is greater, from all land areas for which the perviousness has been changed. It also suggests a minimum detention time of 24 hours. This thesis establishes if these generic criteria, …
Dynamic Stability Of A Self-Excited Elastic Beam, Francisco L. Ziegelmuller
Dynamic Stability Of A Self-Excited Elastic Beam, Francisco L. Ziegelmuller
Theses
An elastic cantilever beam under pressure contact with a moving web undergoes self-excited vibration that may lead to unstable and even self destructive behavior. The equations of motion for the system are derived from the principle of virtual work and Hamilton's principle using the techniques of the calculus of variations. The beam, being a continuum with infinite degrees of freedom, is approximated by a model with a finite number of degrees of freedom using Galerkin's method. The characteristic equation for the model is examined to determine its dynamic criterion for stability. A parametric study is performed to determine the effects …
Multicorrelation Analysis And State Space Reconstruction, David J. Smario
Multicorrelation Analysis And State Space Reconstruction, David J. Smario
Theses
Constructing a mathematical model of a nonlinear system involves developing methods for determining a set of nonlinear differential equations. Based on Floris Takens' theory, the delayed-time space with a given time-series is created, where the first inflection of multicorrelation function is an approximation of the optimal delay time. The multicorrelation function is the generalization of the autocorrelation function into a higher dimension of the system. The standard Grassberger-Proccia algorithm computes the correlation dimension of an artificially generated data set, which involves measuring the distances between all pairs of points, and estimates the dimensionality of the nonlinear system. Finally, the governing …
Nonlinear System Identification, Edward H. Ziegler
Nonlinear System Identification, Edward H. Ziegler
Theses
The prediction of a single observable time series has been achieved with reasonable accuracy and duration for the nonlinear systems developed by Rossler and Lorenz. Based on Takens' Delay-vector Space, an artificial system has been generated using a polynomial least squares technique that includes all possible fifth order combinations of the vectors in the delay space. Furthermore, an optimum shift value has been shown to exist, such that any deviation decreases the accuracy and stability of the prediction. Additionally, an augmented form of the autocorrelation function, similar to the delay vector expansion, has been investigated. The first inflection of this …
Chemical Vapor Deposition Reactor Design And Process Optimization For The Deposition Of Copper Thin Films, Alan Thomas Stephens
Chemical Vapor Deposition Reactor Design And Process Optimization For The Deposition Of Copper Thin Films, Alan Thomas Stephens
Theses
A chemical vapor deposition reactor has been designed, built, and optimized for the deposition of copper thin films. The single wafer, stagnation point flow reactor features: six inch substrate capacity; direct metering and vaporization of liquid precursor; reactant introduction into the reactor chamber through a multi-zone precursor injection manifold; optional variable power (0-300W) RF plasma assist; manual loadlock; and, a computer control interface. Substrate temperature uniformity has been measured to be better than 1% across the substrate over a wide range of temperatures. The injection manifold was designed for precise tailoring of gas flow characteristics across the substrate, incorporating four …