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Articles 1 - 9 of 9

Full-Text Articles in Mechanical Engineering

Experimental Determination Of Colburn And Friction Factors In Small Plate Heat Exchangers With High Surface Enlargement Factors, Andrew H. Pike Dec 2012

Experimental Determination Of Colburn And Friction Factors In Small Plate Heat Exchangers With High Surface Enlargement Factors, Andrew H. Pike

Master's Theses

Experiments were conducted to measure the performance of several small brazed plate heat exchangers. A test apparatus was designed and constructed that allowed for the easy switching of the plate heat exchangers, as well as having the ability to electronically monitor and record the inlet and outlet temperatures, pressures, and flow rates. The flow rates and applied electrical power were controlled electronically by the same program which recorded the data. De-ionized water was used as the heat transfer medium to reduce the uncertainty related to fluid properties.

An existing mathematical model was used to create Colburn and friction factors based ...


Absorber Geometry Optimization For A New Wave Energy Converter, Rachel A. Durren Aug 2012

Absorber Geometry Optimization For A New Wave Energy Converter, Rachel A. Durren

Master's Theses

Alternative energy technologies are on the forefront of research due to the rising costs of oil and natural gas. One relatively under development source of energy is ocean waves. In order to make the use of ocean waves economically viable, the amount of energy absorbed by wave energy converters (WEC) must be optimized. The research within presents a new conceptual design, "Aqua Fly", for a WEC with emphasis on maximizing the amount of energy absorbed. The energy absorption component of the "Aqua Fly" was isolated and a small scale 2-D study of energy absorption. First, the amount of energy in ...


Benchmarking Of A Single-Cylinder Engine Toward The Development Of A Direct Fuel-Injection System, Michael J. Nienhuis Jun 2012

Benchmarking Of A Single-Cylinder Engine Toward The Development Of A Direct Fuel-Injection System, Michael J. Nienhuis

Master's Theses

In this study, the performance and efficiency of a single-cylinder gasoline, fourstroke cycle engine was benchmarked in support of the Formula SAE student project. The development of an engine test stand, instrumentation, data acquisition, and test plan is described in detail. Experimental results in the areas of engine performance and efficiency are discussed. Physical test data were used to refine a previous model of a single-cylinder, gasoline, direct-injection engine. Results from this effort are discussed and compared to those obtained in a preliminary study. The current work advances the development of more efficient power-train technologies for application in small displacement ...


Hydraulic Test Cell Power Recovery System, Peter M. Kanda Apr 2012

Hydraulic Test Cell Power Recovery System, Peter M. Kanda

Honors Theses

Wasted power during testing and development of fluid power components is a major concern due to the negative environmental impact and overall associated energy costs. This report describes a developmental hydraulic test stand and several configurations that could result in recovering wasted power. In this test stand, a hydraulic pump capable of 300 horsepower and above is in the design stages within the testing facilities at FEMA Corporation. The pump contained on this test stand will be designed to create a flow that would simulate what a customer directional control valve would see in a real-world application. The standard hydraulic ...


Plug-In Hybrid Electric Vehicle Hvac Optimization, Jessica Hartl Apr 2012

Plug-In Hybrid Electric Vehicle Hvac Optimization, Jessica Hartl

Honors Theses

The objective of the proposed project is to convert the current heating ventilating and air conditioning system, or HVAC system, on the plug in hybrid Toyota Prius into a completely electric system. As the vehicle is now, the gas engine is required to provide heat loss for the forced air heating system on extremely cold days. The data, which has been gathered over several years, shows a drop in MPG equivalence from approximately 100-120 MPG on ideal days (70° F) to about 50 MPG equivalence on cooler days. This problem can be solved by increasing the effectiveness of the HVAC ...


Optimization Of An Airboat Design, Adam P. Leppek Apr 2012

Optimization Of An Airboat Design, Adam P. Leppek

Honors Theses

Airboats are a common recreational vehicle in southern regions of the United States. A functional prototype of an airboat design was constructed utilizing the manufacturing processes and components available to gain knowledge and experience with the design process. The hull, rudder framework, seating structure, propeller shroud, drive train, and drive unit framework were fabricated at a machine shop. Remaining components were purchased, such as the engine, rudders, and propeller. Welders, mills, lathes, band saws, grinders, hydraulic presses, and power tools were employed in the construction. Drive train and drive unit framework was designed and analyzed using RomaxDesigner, a simulation software ...


Design Of A Catenoidal Shaped Anechoic Termination, Kyle Myers Apr 2012

Design Of A Catenoidal Shaped Anechoic Termination, Kyle Myers

Master's Theses

An analytical model is developed in this thesis to predict the reflection coefficient of an anechoic termination consisting of a catenoidal horn connected to a tube lined with absorbing material. The theoretical predictions are compared to experimental measurements on a prototype. Comparisons are made for a variety of arrangements, including, an open horn, and a horn connected to absorbing terminations of two different lengths. The absorbing terminations are either open or closed to the environment and the analytical model can account for both these scenarios. The results indicate that the new model can accurately predict the reflection coefficient for each ...


Wmu Sunseeker Solarcar, Edmond Ing Huang Tan Feb 2012

Wmu Sunseeker Solarcar, Edmond Ing Huang Tan

The Hilltop Review

This picture was taken, at the racetrack the evening before the start of the North American Solar Challenge 2008 race in Plano, Texas. In this picture is the Sunseeker, Western Michigan University’s solar powered car that will race in the 2 week long, 2400miles long race from Plano, Texas to Calgary, Canada. Sunseeker was the only car in that race that feature a 2 electric motor drive system than the standard one electric motor drive system. Western Michigan University Sunseeker team brought back the sportsmanship award that year.


Microgas Turbine Engine Characteristics Using Biofuel, Edmond Ing Huang Tan, William W. Liou Feb 2012

Microgas Turbine Engine Characteristics Using Biofuel, Edmond Ing Huang Tan, William W. Liou

The Hilltop Review

Aviation fuels commonly used today are extracted from the kerosene fraction of the crude oil that is distilled between the gasoline and the diesel. Crude oil is not renewable and the world oil reserve is generally believed to be on the decline. In 2006, 6.3% of the world's refinery production was used for aviation fuel (Nygren et. al., 2009). At an estimated rate of 3% increase of fuel demand per year, aviation use alone will consume the world fuel production by 2026. Therefore, there is a need for the aviation industry to reduce its dependence on fossil fuels ...