Tesla Turbine Final PowerPoint
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Tesla Turbine
Raj Basuta
Beau Camaren
Monty Dhimmar
Frank Keefer
Lo Saetern
ME 191Fall 2010
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Review the Tesla Turbine
What is it?◦Turbine with flat, encased, co-rotating disks◦Extract energy from a fluid inserted
tangentially◦Converts kinetic energy of fluid into
mechanical energy of a rotating shaft through frictional energy transfer
Why study it?◦To explore why such a potentially green
energy conversion device has not made it to wide-spread industrial use today
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Tesla Turbine Metrics Table
Description Importance (5 > 1) Metrics Units Initial Goals Final Values
Net Weight 3 Weight lbs < 100 ~60
Noise Level 2 Level of Noise dB < 65 ~70
Output Power 5 Power kW 2.5 1.66
Time to Max P 4 Time s < 60 78
Efficiency 4 Power/Power 80% - 90% 30%
Overall Cost 4 Cost USD < 500 $760
Unit Size 3 Volume ft3 1 1
Disk Size Function of Power Size inch 9-10 9
Number of DisksFunction of Power Amount 10-20 10
Inlet Fluid Pressure 5 Pressure psi < 100 300 150
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Early DifficultiesFlatness of disks was out of specification with
10 gage 1018 steel sheet being warped
◦Tested 13 disks with dial indicator after having fabricated 20, and selected the best 10 for use
◦Using a lathe, flats were machined on the jam nuts to match the lightly ground and polished disks all relative to shaft to maintain uniformity of system
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Test Setup
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Sensor CalibrationSpeed Sensor – Honeywell 3010AN
Pressure Diff. Transducer – PX771100WDI
Inlet Pressure Transducer – Honeywell
Thermocouples – J Type from Omega
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Flow TestingUsed campus energy lab,
compressor, and 9 ft3 tank charged to 200 psi and discharged into the turbine
◦An orifice plate, thermocouples, and pressure transducers with Labtech software, were used to find inches of water
◦After running calculations to convert, a flow of approximately 5 lb/minute was found
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RPM TestingWith the same tank and compressor
set-up and charging to 300 psi and discharged into the turbine over a span of about 4.5 minutes
A speed sensor was mounted on the turbine endplate to count the 60 teeth of a sprocket fixed to the shaft as it spun
◦Maximum RPM was calculated as 4000
◦http://www.youtube.com/watch?v=4zxp_ML1kO0
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Power TestingCould not use Dyno, so Power
found through Kinetic Energy calculations using inertia of system and LabView
LabView sensors:
◦RPM◦Time◦Pressure◦Inlet and Outlet Temp◦Flow Rate
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Using this information the fallowing graph was produced
Power Testing
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Modifications
•Decreased the gaps between disks•Decreased internal space
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Optimized Internals Power Testing
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Equations for power
Equations for Efficiency
RPMmax Delta t (s) Power (HP) Efficiency
Unmod.+Dyno. 1027 15 1.185381 -
Unmod. 3249 78 2.258 29.0934%
Mod. 3257 78 2.26 28.74%
Mod.+Dyno. 1309 23 1.255913 -
Power Testing
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FinThank You Mechanical
Engineering Department Faculty and Students, your efforts are truly appreciated
Questions?