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College of Engineering & Science - Louisiana Tech University

Mechanical Engineering

Mechanical Engineering Senior Design Project

Joseph H. Barnwell

Mechanical Engineering Senior Design Contest

May 2, 2008

The 2008 Barnwell Senior Design Contest for Mechanical Engineering students was held in conjunction with the 2008 COES Senior Design Conference. There were twelve Mechanical Engineering design teams who competed for at total of $1,500 in cash prizes. Here are abstracts of their design presentations.

Screen House Lubrication System

Team Members: Paul King, Brenna Marcel, Hunter Newby, Catherine Tuma
Project Sponsor: International Paper, Mansfield, LA

At the International Paper Mill in Mansfield, LA, a screen house separates small and large wood chips. Inside this large structure are many pieces of rotating equipment that must be lubricated on a weekly basis. A lubrication technician who uses a manual grease gun currently does this task. This manual system of lubrication is very labor-intensive and time-consuming. The technician must continually go up and down a five-story building and travel to the machine shop to refill his guns. Our goal is to reduce his workload and time spent lubricating the structure. Our project consists of a single pump on the base floor of the structure and one line that runs up the height of the structure with filling stations on each floor. These filling stations will reduce the work time because it eliminates the trips throughout the building to refill the grease gun. The system will be easily maintained by simply replacing the empty grease barrels when they are empty. For this reason, the pump base is installed in an easily accessible location.

Louisiana Tech Tradition Torches

Team Members: Jeffery Anderson, Andrew Barringer, Christopher Beard, John O'Pry
Project Sponsor: Louisiana Tech Traditions Committee

In an effort to convey pride and school spirit, the Louisiana Tech University Traditions Committee wishes to create a new ceremony that would be a visual representation of the courage and esteem embodied by our mascot, the bulldog. In order to convey this courage and esteem, the committee commissioned the college of engineering and science to design and build a symbol, which will represent these inherent traits of the university. This symbol, an Olympic style torch, will carry and hold a flame - representing the passion of all the students, faculty, and alumni. This torch will become a symbol known to all students and alumni, bringing a closer level of fellowship to all who have and will attend the university. With the help and guidance of the Traditions Committee, Controlled Entropy has undertaken the design and construction of the torches. Unlike many engineering projects undertaken by senior mechanical engineering students, this team not only focused on the functional aspect of the torch, but also the aesthetic qualities required by the university. After several design iterations, the team successfully created a torch that was not only aesthetically pleasing, but also functioned within the parameters set forth by the Traditions Committee.

Heat Exchanger Testing Apparatus

Team Members: Krystal Corbett, T. Michael Lane, Jonathan Lugibihl, Matt Potts
Project Sponsor: ASHRAE Faculty Sponsor: Dr. Hisham Hegab

The purpose of our senior design project is to develop an apparatus that tests the double pipe heat exchangers designed and fabricated by the mechanical engineering students in MEEN 451. Some basic criteria for the apparatus was provided at the start of the project. First, it must accommodate a range of temperatures, flow rates, and heat exchanger lengths. It must maintain a closed loop system, no safety hazards, and have a professional appearance that is portable and easy to assemble. Also, the apparatus must provide visible measurements of temperature, pressure, and flow rate. An in depth engineering analysis using principles of fluid flow and heat transfer was performed in order to develop the testing apparatus design. The design contains two carts that can be moved various distances from each other to accommodate the heat exchanger lengths. Each cart will hold appropriate components for the hot and cold streams, such as water baths, chilling and heating units, pumps and piping configurations to circulate the flow. The apparatus will be given to Dr. Hegab for use in the MEEN 451 class and utilized by the students in the class. It is expected to maintain a five year minimum lifespan with little maintenance.

Thermal Control System For Nasa Lunar Rover

Team Members: David Marler, Robert Marler, Chester Materne, Tyler Neale
Project Sponsor: NASA Faculty Sponsor: Dr. Hisham Hegab

With a desire to return to the Moon, NASA has requested a design for a thermal control system to be used on a small, unmanned lunar rover. The thermal control system should maintain acceptable temperatures for internal components to ensure functionality of the rover. Since previous thermal systems used by NASA involved complicated pumped fluid loops, a simpler design was desired.

The primary function of the thermal control system is to maintain an operational temperature range between 0 and 30 degrees Celsius. Other requirements include a robust and simple design, survival of a 20-g load, operation at a 45 degree angle, and a lifetime of 3 months. Basing the design on the previous Mars Pathfinder, the thermal control system needed to fit in a certain geometric envelope as well.

In order to satisfy these requirements, a loop heat pipe system utilizing capillary action was designed. The capillary action of a wick within an evaporator provides the pumping power for the system. Heat is absorbed from critical components via the evaporator, which transfer heat into the working fluid. The working fluid, in turn, flows out of the evaporator and releases the heat from the system in the condenser.

Injection Molding Facilities Work Cell Repair And Refurbishment

Team Members: Stven Hutto, James McCalmont, David Stoneking

The senior design project for team IMF is an open-ended problem involving a 30 ton Trubor injection molding machine located in Bogard Hall, which is located on the Louisiana Tech University campus. The main objectives of the project involve refurbishing the existing machine, designing an industrial work cell around it, and designing an innovative mold insert for future use. Also, user documentation must be written for use by future operators. Another objective is to render the injection molding machine ready for educational purposes within the College of Engineering and Sciences. A well running machine, such as this, will provide potential hands-on experience with subjects such as thermoplastics material processes (chemical and mechanical), industrial engineering processes, and manufacturing environments. Also, the programmable logic controller (PLC) must be available for use within the electrical engineering curriculum.

Semi Automatic T-shirt Launcher

Team Members: Marcos Favela,Francisco Garcia,Brad Kaufman,Dustin James

Halftime Technologies will design and build a low cost, safe, and easy to use Semi Automatic T-shirt Launcher that is capable of launching 6-10 t-shirts per minute to enhance the game day experience. Our customer needs a gun to increase halftime entertainment by allowing fans to come down out of the stands and firing the cannon at three targets placed in the stands for a prize. The gun needs to be user friendly since the customer will only have a few minutes to teach the fan how to fire the gun and keep the halftime entertainment going without angering the crowd.

There are a number of t-shirt cannon designs available on the internet from a range of prices ($250 - $3000) for consumers. The cannons are simple designs and are closely related in their ability to bring entertainment to customers. However, there are no current designs that allow the customer to fire t-shirts simultaneously (5-15 shirts/minute) that are portable and consumer friendly.

Our design will be made up of two chambers and one barrel connected with a T Valve assembly to allow the consumer to pressurize the gun to 100 psi. After the gun is pressurized, the user will be able to fire the gun 6-10 times before the gun needs to be pressurized with air. The t-shirts will be stored in a 37 inch long magazine which is mounted on top of the barrel to allow the t-shirts to fall (one at a time) into the barrel after each shot. The gun will be easily fired via a momentary-on switch connected to a circuit that will allow several safety features which include disabling the gun completely via an external remote, disabling the gun from firing by disabling the power through a protected cover switch (when the gun is not being used), and only allowing controlled bursts of pressure out of the chambers at a time.

ASME WinRobo Design Competition

Six design teams participated in the ASME WinRobo National Design Competition. The objective was to design and construct a prototype autonomous or semi-autonomous robot that could clean a standard double hung residential window without operator intervention.

WinRobo Team #1

Team Members: Daniel Evans, Kaitlyn Jennings, Johnathon Jones, Jeffrey Mcgriff 

WinRobo Team #2

Team Members: Louis Malain, David Newbold, Matthew Griggs

WinRobo Team #3

Team Members: Lloyd Allen, Marcus Harmon, Brooks Alvestad, Ben Pullin

WinRobo Team #4

Team Members: Jonathan Ashworth, Joshua Goff, Bianca Laurendine

WinRobo Team #5

Team Members: Gregory Robertson, Chris Clark, Matthew Kelly

WinRobo Team #6

Team Members: Kyle Kinler, Dustin Jones, Blake Moore, Johnny Deloach

Six design teams participated in the ASME WinRobo National Design Competition. The objective was to design and construct a prototype autonomous or semi-autonomous robot that could clean a standard double hung residential window without operator intervention.