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Rotary Steam Engine. Group Members: Brent Bass, Kenneth Ewa , Jesse Buck, Christian Diaz, Shane Gillispie , Michael Hargett , Dylan Hinson, Jonathan Labonte , Andre Lawrence, Franklin Spruill, David Allgood. Nondisclosure Agreement.
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Rotary Steam Engine Group Members: Brent Bass, Kenneth Ewa, Jesse Buck, Christian Diaz, Shane Gillispie, Michael Hargett, Dylan Hinson, Jonathan Labonte, Andre Lawrence, Franklin Spruill, David Allgood
Nondisclosure Agreement • Some vital materials used are subject to a signed non-disclosure agreement. Please respect that some questions may not be fully explained due to the NDA.
Combustion • Using six different fuels (natural gas (methane), propane, diesel, biodiesel, gasoline, ethanol (E100)), final testing was completed. • The performance characteristics (flame temperature and heat transfer (Qh)) were determined through our MATLAB program. • Each fuel underwent a cost analysis and a feasibility study. • A final conclusion on which fuel will be selected as the best candidate for the rotary steam engine, as well as an updated model, will be determined shortly. Refinement of the MATLAB program will be completed in the next week.
Engine • In the engine analysis, a preliminary model of the dual core Spindyne engine has been constructed. • We have found mass flow-rate, work, torque, and power that can be produced by this engine. • Our calculations show that with a one core we can produce 70.571 horsepower and with two cores 141.142 horsepower with a respective mass flow rate of 0.11513 pounds-mass per second. • The assumptions in certain processes within the engine analysis are adiabatic, steady pressure variations, fixed mass, UFUS, and 0.86 percent error within the model. Further work on our model will be performed.
Condenser and Pump • For the condenser analysis, we attempted to form a model for use for heat and mass transfer analysis. • We believe that the existing Spindyne is not feasible because the use of metal foam inside the cooling tubes will present an issue within the system. • Through our model of the condenser and pump • Condenser heat rejection (Ql): 95.25 BTU/s • Pump power: 0.39HP • Currently researching commercial water pump to handle these conditions. • High-pressure Triplex Pressure Pump which requires 1.7 HP @1000 PSI
Metal Foam • The metal foam component of the radiator primarily concerns use of copper foam or aluminum foam. • For the purposes of this project, it is recommended that copper foam, based on the higher level of thermal conductivity, be the first option. • However, aluminum foam’s level of thermal conductivity is also high and is more cost effective than copper foam. • Most suppliers machine the components to the dimensions needed.
Boiler • Copper material has been selected for the boiler due to high thermal conductivity and cost efficiency. • To protect all surfaces that come in contact with saturated moving fluid, a chemical treatment is needed. • A study into what treatment would be most effective in terms of cost and effectiveness has yet to be conducted. • This study will begin in the next week.
Miscellaneous • Cost analysis of the desired materials used in the engine and the rest of the system is ongoing. • Thermal efficiency of the cycle will be determined once an updated combustion model is found(Qh). We are expecting around a 25% efficiency. • Carnot Efficiency @ current operating conditions = 45.87% • FE analysis • Spindyne has responded stating their drawings were done in AutoCAD. We are in the process of converting their AutoCAD files into MCS PATRAN to perform a FE analysis on the rotor and engine core.
