Engineering Commons^™

A Computer Program For Analyzing Moist Air In Fin And Tube Crossflow Heat Exchangers, Robert F. Stricker

Retrospective Theses and Dissertations

A computer model of a fin and tube air-to-air heat exchanger is presented. The model incorporates a computational scheme to account for latent effects due to small amounts of moisture in one or both fluid streams. A testing program is described which was performed in order to mathematically characterize the heat transfer and pressure drop relationships of the tube with turbulator used in the heat exchanger. These relationships are included in the computer model. A comparison of the computer model to heat exchanger test data indicates that the computer model may be relied upon to provide design and analysis information. …

Microcomputers: An Alternative For Digital Controllers, Richard Brooke Wavell

Retrospective Theses and Dissertations

Two candidate microprocessors are selected to demonstrate that microprocessors can be effectively utilized in digital control applications. The Intel 8085A-2 is selected to represent 8-bit microprocessors and the Intel 8086 is selected to represent 16-bit. A baseline second order digital filter algorithm is developed for comparison of the performance of the two microprocessors for both software and hardware multiply implementations. Emulation techniques are utilized to facilitate performance comparison, without large investments in software and hardware development. In addition, they provide a method for evaluating new microprocessors, before hardware becomes available. The emulations are then used to verify and to determine …

A Co-Op Advertising Information System, Kay C. Gardner

Retrospective Theses and Dissertations

This report presents the development of a business information system for co-op advertising. An underlying assumption is that information systems add value to an organization. It is an application of data bank theory, and demonstrates the techniques required to maintain a current information system, i.e., add, change, and delete capabilities. The master file is sequentially accessed to produce reports by participation percentage, classification, or expiration date.

Environmental Aspects Of The Nuclear Fuel Cycle And High-Level Radioactive Waste Disposal, Robert S. Kent

Retrospective Theses and Dissertations

An assessment of the environmental effects of the nuclear fuel cycle industries is discussed, reactor waste inventory and standards are presented, and the alternatives for high-level radioactive waste disposal reviewed, with particular attention being given to disposal in deep geological formations on land. One of the major concerns regarding potential impacts of the nuclear fuel cycle industries is the lack of a definite and proven method of disposal of the high-level radioactive wastes from light water moderated reactors. The problem is expected to become more pressing as the nuclear power industry and the associated radioactive waste inventories grow in the …

An Introduction To The Winograd Discrete Fourier Transform, Janice S. Agnello

Retrospective Theses and Dissertations

This paper illustrates Winograd's approach to computing the Discrete Fourier Transform (DFT). This new approach changes the DFT into a cyclic convolution of 2 sequences, and illustrates shortcuts for computing this cyclic convolution. This method is known to reduce the number of multiplies required to about 20% less than the number of multiplies used by the techniques of the Fast Fourier Transform. Three approaches are discussed, one for prime numbers, one for products of primes, and lastly one for powers of odd primes. For powers of 2 Winograd's algorithm is, in general, inefficient and best if it is not used. …

A Heuristic Approach For The Scheduling Of Technical Training Courses In The U.S. Navy, William H. Lindahl

Retrospective Theses and Dissertations

The generation and maintenance of feasible schedules for Navy training courses are labor intensive throughout the Naval Education and Training Command. The major constraints affecting this scheduling are planned input requirements and the suitability/availability of instructors, equipment, and facilities. An additional constraint is that schedules must be established for the current year, updated and revised as necessary, and projected for the out-year planning requirements of the 5-Year Defense Plan. This thesis documents the essential components of scheduling for training at a representative training center, the Fleet Anti-Submarine Warfare Training Center, Pacific. It provides details for the automation of the current …

Scrubber Design For Phosphoric Acid Production Facility, Edward E. Mayer

Retrospective Theses and Dissertations

This report is an examination of the practical design of a phosphoric acid production facility wet scrubber. It includes a brief background of the Florida Phosphate Industry, in addition to the rules and regulations affecting the emission of fluoride contaminates. The theoretical aspects of a packed absorption tower is discussed prior to the actual design of a cross-flow wet scrubber of the type typically found in the Florida Phosphate Industry.

An Application Of A Single Chip Slave Microcomputer As An Intelligent Interface, Thomas J. Riordan

Retrospective Theses and Dissertations

This thesis describes the operation of an intelligent controller existing between a computer system and a peripheral. The intelligent controller is implemented with an INTEL universal peripheral interface, UPI-41, single chip slave microcomputer. The interfaces between the controller and the computer system, and the controller and the peripheral are described in detail, as are the firmware and internal facilities of the controller itself. An evaluation of system operation is presented and, finally, the organizational philosophy of the system is discussed. Located within the appendices are a system schematic and listing of the controller program.

Heavy Metals In The Water And Wastewater Systems Of The University Of Central Florida, William Keith Mccully

Retrospective Theses and Dissertations

In large enough quantities, heavy metals may be detrimental to human health. Metals in raw water may pass through a water treatment plant without being completely removed. Once in a the distribution system, the water may experience metal pick-up due to corrosion. During the course of this study, an attempt was made to determine the heavy metal concentrations in the University of Central Florida's potable water systems. Samples were fun on the plasma spectrophotometer, Spectraspan III, and analyzed for heavy metal content. The results indicate pick-up of Fe, Al, Cu, and Zn in the distribution system. The arsenic and lead …

Validation Of A Transient Simulation Program (Trnsys), Brian F. Goldiez

Retrospective Theses and Dissertations

Although a Transient Simulation Program (TRNSYS) has become a widely used model for simulating a solar energy system, there has not been extensive work done in validating this model with actual data. The approach used to validate this model consisted of a modular buildup of components with validation for each module. Extreme care was taken in choosing the necessary parameters to model each component. Where parameters were not given, they were either derived or reasonable values were selected based upon general conditions prevailing in Central Florida or conditions which are generally true for certain solar hot water systems. The intent …

Curing And Flow Of Thermosetting Resins For Composite Materials Pultrusion, Howard L. Price Jr.

Mechanical & Aerospace Engineering Theses & Dissertations

Fibrous composite materials for mechanical and structural applications often are expensive due to high labor costs. One economical way of making composites is pultrusion, a manufacturing process in which resin-impregnated fibers are pulled at a constant speed through a heated die which shapes the resin-fiber mass and cures the resin. Most of the work which has been done on the process has been of an empirical nature, with limited understanding of the process principles. Most of the experience with pultrusion has been gained with polyester resins and glass fibers. Very little experience has been gained with higher performance, more costly …

The Design And Construction Of A Flashlamp-Pumped Frequency-Doubled Dye Laser Applicable To Long Path Monitoring Of Air Pollutants, Joel Craig Johnson

Dissertations and Theses

The subject of this thesis is the development of a laser light source which could be used in an air pollution monitor to measure the average concentration of sulfur dioxide gas over long paths (>1 km). Many of the problems encountered in designing a long-path pollutant monitor such as instrument cost and reliability, the selection of an optimum spectral region for making the measurement, and light losses due to scattering and turbulence, are considered. The result of these considerations together with a survey of available laser light sources suggested that a frequency-doubled dye laser possessed several advantages over other …

Film Boiling Destabilization From Hydrodynamic And Thermodynamic Considerations, Fred Samuel Gunnerson

Nuclear Engineering ETDs

An analytical method is presented for predicting, from first principles, the minimum heater temperature and heat transfer rate at the onset of film boiling for spherical and ·flat plate heaters in saturated and subcooled liquids. Within the analysis, consideration is given to the two types of film boiling, they are:

(1) Pool film boiling where the entire heater is submerged within the boiling liquid, and

(2) Leidenfrost film boiling where a droplet of liquid boil s above a horizontal plate heater.

Study Of The Avalanche Multiplication And Signal-To-Noise Power Ratio In The Ternary InXGa1-XAs Avalanche Photodiode, Susan Lee Wymer

Retrospective Theses and Dissertations

Major advances in fiber optic transmissions have brought about a need for highly sensitive photodetectors. In order to detect this type of transmission, the photodetector must be able to detect one of the two low loss windows of the fiber optics transmission. The photodetector must also be characterized by a high gain and fast speed of response without generating excessive noise power. This report compares different types of high speed phodetectors with emphasis on the merits of using an avalanche photodiode. The report studies the avalanche multiplication and the signal-to-noise power ratio in the ternary InGaAs. The effects of the …

Treatment And Disposal Of Hazardous Wastes In The East Central Florida Region, Tracey Bell

Retrospective Theses and Dissertations

Although the East Central Florida area is not heavily industrialized, its dependence on groundwater resources makes it especially vulnerable to contamination by poor waste disposal practices. The East Central Florida area was studied to discover the nature and disposal of hazardous wastes generated. It was found that a large portion of hazardous wastes in the region were from very small industries, distributors, and even consumers. Three of the most toxic and/or voluminous waste problems in the area--metal plating wastes, pesticide wastes, and hospital wastes--were studied to determine available alternatives for disposal and their costs.

Accelerated Flight Test Data As A Basis For Forecasting Logistical Requirements Of Military Aircraft, Charles James White

Retrospective Theses and Dissertations

The initial forecasting of logistical support for new types of military aircraft is a perplexing problem. The objective of this research was to investigate the feasibility of using data generated by the accelerated flight tests as a basis for forecasting the logistical field requirements. The data used in the study were obtained from the U.S. Army Aviation Board, Fort Rucker, Alabama, where performance tests are conducted on all new aircraft to determine their suitability for Army use. It was statistically shown that the use of these data could provide more realistic logistical forecasts earlier in the introductory phase of the …

Performance And Evaluation Of Swine House Heating With A Solar Energy Intensifier-Thermal Energy Storage System, Albert J. Heber

Electronic Theses and Dissertations

The urgency for energy independence in the United States is unprecedented in its history. The demand for energy is reflected in rising fuel costs which affects every segment of the economy. Among the most severely affected sectors is the agriculture industry, whose fossil fuel consumption is crucial to its efficient production of food and fiber. Solar, one of several alternative energy sources being developed nationwide has unique possibilities in the U.S. agriculture system. Large areas are available for locating collector units, and the energy requirements in the farm are low compared with the available radiation falling on the area. Drying …

Design Of A Vertical Axis And Turbine-Variable Speed Heat Pump Alternate Energy System, John V. Karnitis

Electronic Theses and Dissertations

The primary objective if the project is to design an unguyed wind energy conversion system consisting of a Savonius rotor assisted non-articulating 5m (15 ft) diameter Darrius vertical axis wind turbine, which is self-starting, and is mechanically coupled by a V-belt drive to an automotive air conditioning variable speed compressor. The variable speed-compressor is utilized as a mover for a variable speed heat pump system. The basic objective is further subdivided into the following objectives:
1. To develop a preliminary design of the wind energy conversion system, which later cane be modified to the existing energy needs.
2. To predict …

Design And Performance Of A Solar Energy Intensifier System For Drying Shelled Corn, Kenneth J. Hellevang

Electronic Theses and Dissertations

Since utilizing solar energy as an alternate energy source for agricultural applications is dependent on improvement in the design of solar systems and on documentation of the performance characteristics, reliability and economic feasibility of solar systems, research was conducted with the following objectives: 1. Design a multi-purpose solar energy system with a diurnally tracking solar energy intensifier and a thermal energy storage unit to warm the ventilation air for a swine confinement building and to dry corn. 2. Test the solar energy intensifier-collector system for corn drying under actual conditions. 3. Evaluate the performance and economic feasibility of a diurnally …

A Metallurgical Evaluation Of The Mi Vida Prospect: A Mixed Copper Sulfide-Carbonate Ore Body, Sells, Pima County, Arizona, Kevin Michael Kenney

Masters Theses

"A copper-prospect in south-central Arizona has been evaluated on a metallurgical basis. Primary chalcocite and secondary covellite, plus the copper oxides malachite and brochantite, constitute the economic mineralization. The deposit outcrops as a steeply dipping (70°SW), intensely brecciated, copper-bearing quartz vein with discontinuous lenticular ore shoots.

Acid leaching techniques alone and in conjunction with froth flotation utilizing four copper oxide specific collectors were used to evaluate the amenability of this ore to processing. Direct acid leaching was examined and found to be ineffective. Removal of the chalcocite by froth flotation with xanthate was easy and gave better results to subsequent …

Recovery Of Lead From Lead Smelter Mattes, Cheng-Ping Chang

Masters Theses

"A by-product of lead smelting is a matte which consists mostly of lead and copper sulfides. Experiments were conducted to determine the feasibility of removing lead from molten matte by adding iron as a reducing agent. The effectiveness of iron at 1000 and 1100°C was a function of matte composition, but not of temperature except near iron saturation. The lead content of matte could be decreased to as low as 9.0 to 11.6 wt pct (2.3 to 3.0 at. pct) at 1000°C, depending on composition. The effect of oxygen in the matte on lead recovery from iron-saturated mattes was also …

Development Of Impervious Low Thermal Expansion Petalite Bodies, Suchinda Chotipanich

Masters Theses

"Impervious petalite bodies were formulated from petalite, lithium aluminosilicate frit and kaolin. Thermal expansion coefficients for selected bodies were less than 2 x 10⁻⁶ /°C(20 - 600 °C). Mineralogy and the reactions in systems containing petalite, lithium aluminosilicate frit and kaolin were observed. Silica-poor high quartz solid solution was found to be the reaction product formed from the reaction between frit and kaolin before conversion to ß-spodumene solid solution at higher temperatures. The crystallization of the ß-spodumene solid solution phases in this system did not occur at the same temperature resulting in variation in the size of the crystallites. The …

Pelletizing Of A Lead Sinter Machine Feed, Hung-Yang Tsai

Masters Theses

"A typical lead sinter machine feed can be pelletized in a drum pelletizer using tap water as a binding liquid. The green pellets produced have return sinter as cores, and an outer layer of new material and fluxes. The moisture content of the pellets produced is about 5%. The pelletizing procedure developed used raw materials from the Amax Lead Smelter, with only a minor amount of feed preparation. The importance of proper moisture control, use of binders, method of adding moisture, speed of pelletizing drum, etc. were investigated. The stability of pellets under extreme storage conditions was also determined"--page ii.

A Planning System For Research Management In A University Environment, Russell Lee Goldammer

Masters Theses

"The research project director at a college or university has few, if any, of the traditional management tools that are available for other forms of management, especially in performing the early, crucial stages of planning. This is particularly distressing since managing a program in this type of environment can be very difficult, due to bureaucratic red tape and interdepartmental concerns. The purpose here is to develop an aid for managers with these problems, for more effective research management in a university environment.

After developing a general model for a typical research project at a university, the Gasification Research On Wood …

Boehmite-Bonded High-Alumina Refractories, Gerhard H. Schiroky

Masters Theses

"High-alumina refractories (99+ % Al₂O₃) were produced by pressing a mixture of 70% tabular alumina and 30% reactive alumina and autoclaving in saturated steam at 1.4 MPa (200 psia)/194 °C to 3.4 MPa (500 psia)/242 °C for 12 to 96 h. Autoclaving converted the reactive alumina to boehmite which acted as the bond phase. At room temperature the MOR ranged up to 37 MPa depending upon boehmite content. The hot-MOR decreased steadily with increasing temperature, but was still 8 MPa at 1400 °C which exceeds that of comparable cement-bonded or conventionally fired high-alumina refractories. The estimated autoclaving costs are lower …

Application Of Optimization Techniques To The Optical Design Of A Laser Seeker, David William Allemeier

Retrospective Theses and Dissertations

This report describes the development of a computer model for the design of a laser seeker optical system. A laser seeker is a device that detects pulsed laser energy. The computer model is configured to design the seeker optics based on the following performance criteria: Sensitivity to laser energy, which can be related to target acquisition range; optical field of view; and seeker optics cross section area. The design is defined by four variables and a set of fixed parameters, and is configured using computer optimization with both a direct search and a random search being used. A superior design …

Elimination Of Nematodes From The Soil By Microwave And Dry Heat, Behrouz Abbassi

Retrospective Theses and Dissertations

No abstract provided.

Digital Architecture For A Computer Based Imaging System, John Osborn Mcintosh

Retrospective Theses and Dissertations

There is a great need for a graphic simulation system used as a training device to take the place of actual flying. A good system will greatly reduce the cost of training men as well as cut down on casualties. Several systems have been tried and are now in use. Among them are two that are worthy of more study. These are the CCTV or model board and the digital systems. Both have several disadvantages that create a need for a new system. One such system is an optically based digitally processes system that combines the best features of two …

Wastewater Pretreatment System For A Printed Circuit Board Plant, Raymond F. Green

Retrospective Theses and Dissertations

The wastewater from the electroplating processes required for the production of printed circuit boards has a high heavy metal content. The regulatory agencies of both the Federal Government and the State of Florida set pretreatment limitations on the quantity of the hazardous heavy metal ions that may be discharged t o a receiving body of water or to a Publicly Owned Treatment Works. A number of treatment processes are available for the effective removal of these pollutants. The mechanism behind the more common processes are discussed in this paper. Many variables must be considered in the design of a wastewater …

A Passive Cooler For A Humid Climate, Steven Gilbert Ring

Retrospective Theses and Dissertations

This paper examine a passive cooling system for a humid climate. This system will be divided into two parts, a radiative system and an evaporative system combined into a roof pond system. Performance of the radiative system will be enhanced through the use of a selective cover which will make use of an atmospheric window between 8 and 13um. An attempt will also be made to thermally isolate the radiative system from convective gains with the evaporative system. The evaporative system will consist of a water, solvent and dye layer over the selective cover of the radiative system. The performance …