Rotary Steam Engine Group Members: Brent Bass, Kenneth Ewa, Jesse Buck, Christian Diaz, Shane Gillispie, Michael Hargett, Dylan Hinson, Jonathan Labonte,

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.

Entire Steam Generation System

Scale

Subgroups

CombustionHeat Exchanger/Boiler

EngineCondenser/Pump

Combustion Using six different fuels (natural

gas (methane), propane, diesel, biodiesel, gasoline, ethanol (E100)), final testing was completed. Have only fully tested Diesel Fuel.

Flame temperature was fixed as we solved our equation for Q (heat transfer in kJ/kmol) of the fuel.

Each fuel underwent a cost analysis and a feasibility study.

Average MPG of a Semi-Truck is about 4-7 miles per gallon

*miles per gallon, ideal basis. Ranged from Tp (flame temp) of 800 Fahrenheit (top) to 1200 Fahrenheit (bottom) (Diesel Fuel)

MPG (miles per gallon)

Results: PriceUNITS: $/Gallon or GGENG (Methane) 2.05Propane 2.96Gasoline(Octane) 3.45Ethanol 3.04Biodiesel(20%)B2 4.02Diesel 3.91

Combustion of Diesel Fuel

Combustion of Diesel Fuel

Boilers and Chemical Treatments

How chemical treatment works-Controls metal oxide deposits

that cause corrosion using a unique polymer

-Uses a phosphate buffer that controls ph levels in the water that from becoming to low (acidic)

Corrosion in Boilers

Boiler after Inhibitors are added*through feed water

Chemical Treatment Product:OptiSperse* HP54674

(aqueous solution)

(can be used by itself without additional products) Product Claims

• Outstanding protection against metal oxide deposition and caustic corrosion

• Designed and field proven for high pressure boilers

• Cost-effective program cuts downtime and maintenance

• Provides optimum pH/phosphate control Corrosion in a boiler

Engine• Superheated

steam is injected to the right of each red slide.

• Uses the energy of the steam to turn the rotor creating shaft power.

• Coated in a hard and frictionless material to reduce losses.

Engine In the engine analysis, a preliminary model of the

single core Spindyne engine has been constructed.

Above numbers are directly proportional to number of cores used in engine design. Tri-core engine at nominal conditions 211 Hp and 1111 ft/lb of torque

Engine

Engine

Condenser/Pump• Condenser turns the steam from

exhaust vapors back into water in order to reuse it for the steam cycle.

• Ideal condenser calculations assume a constant pressure process.

• Metal foam used inside cooling tubes to increase heat transfer.

• Use of cooling fins along with air flow to cool steam

• Assumed size is 3’ x3’, dimension of tubes to be determined.

• Materials research of condenser materials ongoing

Metal Foam• Has increased

surface area per unit volume

• Copper foam has greater thermal conductivity• Copper: 5.84

BTU/hr-ft-F• Aluminum:3.4

BTU/hr-ft-F

Feed Water Pump Feed water pump used to increase the

pressure of the water leaving the condenser and return the water to the boiler.

Ideal Model: Pump analysis assumes reversible adiabatic compression process.

Through our model of the pump

Pump power: 0.39HP

Inlet State: 178.36F , 7.25psia

Outlet State: 178.90F , 800psia

Pump Cavitation

Degrades pump performance

Destructive to internal components

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 model is not feasible because the use of metal foam inside the cooling tubes will present performance issues in the system.

Through our model of the condenser and pump Condenser heat rejection (Ql): 95.25 BTU/s

Currently researching commercial water pump to handle these conditions.

High-pressure Triplex Pressure Pump which requires 1.7 HP @1000 PSI will not work.

Miscellaneous Thermal efficiency of the cycle

((Wengine-Wpump)/Qhigh) will be determined once further perfection of data occurs. We are expecting around a 25% efficiency.

Carnot Efficiency @ current operating conditions = 45.87%

Cost analysis of the desired materials used in the engine and the rest of the system is ongoing.

FE analysis

Budget

Gantt Chart

Questions?