engine condenser pump combustion boiler david allgood dylan hinson christian diaz brent bass...
DESCRIPTION
SpinDyne Rotary Steam (RS) EngineTRANSCRIPT
ROTARY STEAM ENGINE
Engine Condenser Pump Combustion BoilerDavid Allgood Dylan Hinson Christian Diaz Brent Bass Franklin SpruillJesse Buck Shane Gillispie Michael Hargett Jonathan Labonte Andre LawrenceKenneth Ewa
Project Advisor Dr. Taylor
Nondisclosure Agreement Certain design aspects are subject to a
non-disclosure agreement. Please respect that some questions may not be fully explained due to this agreement.
SpinDyne Rotary Steam (RS) Engine
EngineAnalysis Method
Pi Ti Vi mi vi hi si Cp Cv
Calculated
mi=mf
Calculated
Pf Tf Vf mf vf hf sf Cp Cv
Known
Known
mi=mf, where m=V/v
Steam state entering engine (i)
Steam state exiting engine (f)
Engine Results
*The red font represents the nominal operating conditions that were to be tested, 800 psi and 718°F (entering the engine conditions)
Condenser and Pump Use of SteamTab and Matlab to find inlet
and exit conditions Found minimum heat rejection needed
for each pressure
P1 (engine inlet, psia) P2 (engine exit, psia) T2 (engine exit, F) x (engine exit quality) Q_low (condenser, Btu/sec)
Q_low (condenser, Btu/hour)
700 6.5 172.65 0.83804 101.21 364356750 7 175.99 0.83713 108.51 390636800 7.499 178.36 0.83624 114.08 410688850 7.875 181.36 0.8348 121.36 436896900 8.375 184.21 0.83397 128.53 462708950 8.874 186.25 0.83314 134.03 482536.81000 9.25 188.87 0.83184 141.19 508284
Metal Foam The metal foam helps increase heat transfer
out of the system to conserve internal energy. The idea is no longer feasible due to costliness While a metal foam condenser foam would
work, the price for having ERG Aerospace due an analysis to find a size was estimated to be around $8,000
The prototype would cost even more The cost does justify the amount of work that
has to be done to build a working prototype
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 Inlet State: 178.36F , 7.25psia Exit State: 180.43F , 800psia Pump Power Required: 0.408HP
P1 (Engine inlet, psia) P3 (Pump inlet, psia) T3 (Pump inlet, F) P4 (Pump exit, psia) T4 (Pump exit, F)
Pump Power Required (hp)
700 6.250 172.651 700 173.965 0.3023750 6.750 175.988 750 177.295 0.3608800 7.250 178.359 800 180.425 0.4086850 7.750 181.365 850 182.683 0.4569900 8.250 184.212 900 185.540 0.5162950 8.500 186.255 950 188.256 0.5745
1000 9.000 188.866 1000 190.231 0.6359
Pump Cavitation
Pump Inlet State Pressure 7.25psia, Temperature: 178.36F Vaporization Pressure: 7.2psia (178.36F)
Pump Cavitation Degrades pump performance Destructive to internal components
Buffer Tank Provide Additional Head to the Pump
T3 (Pump inlet, F) Vapor Pressure @ T3 (psia)
P3 with 1ft Head (psia)
P3 with 3ft Head (psia)
P3 with 5ft Head (psia)
172.651 6.355 6.930 7.800 8.670175.988 6.854 7.430 8.300 9.170178.359 7.229 7.929 8.799 9.669181.365 7.728 8.305 9.175 10.045184.212 8.228 8.805 9.675 10.545186.255 8.603 9.304 10.174 11.044188.866 9.303 9.680 10.550 11.420
Pump Cavitation
170 172 174 176 178 180 182 184 186 188 1905
6
7
8
9
10
11
12 Pump Cavitation
Vap PressurePump Inlet Pressure1ft Head3ft Head5ft Head
Temperature (F)
Pump InletPressure
(psia)
Boiler requirements Heat transfer rate Required
Qdot =148.55 kW Nominal Temperature and
pressure entering the engine @ 718 ˚F and 800 psi
Calcium Silicate pipe insulation
•temperatures 1200 ˚F•Flame retardant •Rigid and durable •Low thermal
conductivity
Combustion
Combustion Raw Data
Combustion Thermal Efficiencies
Combustion Final Ranking
Finite Element Analysis
High displacement areas are noted in red
A maximum deflection of 0.0005 in
Material Stainless Steel
Rotor is 4 in thick
0 1 2 3 4 5 6 7 8 9 100
50
100
150
200
250
300
350
400
450
500T- s Diagram for Rankine Cycle
Saturated Liquid Saturated Vapor
Pump Boiler
Engine Condenser
Entropy [kJ/kgK]
Tem
pera
ture
[oC
]
WORK total = Wengine – Wpump = 71.392 – 0.408 = 70.984
IC engines in production
DD13 Detroit Cummins QSK78 Volvo Penta
Exploded View
Engine comparisonSPINDYNE DD13 V-12 DETROIT
Conclusion: Is the RS engine feasible
SpinDyne’s current design is not feasible as of now, to replace the internal combustion engine. SpinDyne’s current design of dual cores will not produce enough power or torque to create sustainable vehicular propulsion It lacks engine performance
Would need about 6 cores to match the horsepower/torque of a tractor trailer engine which not only creates a size issue but cost increase
Cost Space-age materials and new manufacturing
process
Conclusion: This engine is currently not a viable option to
replace the IC engine but is capable of being a power source in various industries
Further advances in manufacturing processes and material sciences in the future might allow this engine to be feasible
Budget
Budget
Questions?