revolutionary technologies group c1 nicholas arch, nicholas fraser, robert huth, patrick noble,...

Revolutionary Technologies

Group C1Nicholas Arch, Nicholas Fraser, Robert Huth, Patrick Noble, Michael Toomey

Preliminary Design ReviewFebruary 21, 2008

Last Week’s Action Items ITEM 1: Perform Research for Trade Studies

Arch – Matlab code examines generator-gearbox features

Frasier – Designing base “tower” and guy wires Huth – Modeling loads on shaft to determine diameter

and material properties needed Toomey – Calculated area required to extract necessary

power from wind and number of blades in helix Noble – Research methods for analyzing fluid flow

through blade overlap

Item 1: Trade Studies in Progress

T=(D1-D2)r=ρdV2(A1Cd1-A2Cd2)/16

d

D1

D2

A1

A2

Item 1: Trade Studies (Cont’d)

• For a hollow shaft, deflection is more dependent on outer diameter.

• Plot will allow material selection (Elastic modulus) for a maximum deflection.

Elastic Modulus [Gpa]

Max

. Def

lect

ion

[m]

Last Week’s Action Items (Cont’d) ITEM 2: Develop Intelligent Systems Concepts

for Turbine As group, brainstormed concepts:

Monitor rpm of turbine and generator shafts with tachometers

Anemometer to measure wind speed Discussed electronic components with Mr. Brownell

Battery type (Lithium-Ion, Carbon-Zinc, Capacitor, Lead Acid) Charging issues (Diode, Voltage Regulator, DC-to-DC

Converter) Safety concerns (Temperature Sensor – Relay Control

System)

Lead Acid Battery Chosen – simple charging scheme and produces fairly constant 12.6 V

Current Regulator Required (i.e. diode, automotive V-regulator, DC-to-DC converter)

Safety Concerns Cutout charging if charging current or temperature is too

great Cutout generator or brake turbine if outside operating zone

Item 2: Electronics

light

relayReg. Reg.

Gen.

1.8 A3.6 A

Current Status of Concept

Status of Design- Trade Studies to assist in critical decision-making- Show-stopper: Simple, quick to assemble

Next Week’s Action Items Major Component Selection and Ordering

Huth will present shaft study results and group will determine shaft to order (Tues. 2/26)

Investigate bearings to fit shaft (Tues. 2/26) Arch will search for gears (Tues. 2/26) Noble will check back with Mr. Brownell to ensure

generator procurement (Tues. 2/26) Select and locate blade material (Huth will visit Physics

machine shop) (Thurs. 2/28)

Next Week’s Action Items Cont’d Complete Trade Studies

Group members will present results from trade studies (Thurs. 2/26)

Critical design variables selected (Thurs. 2/26): Blade Diameter and Height Overlap Gap Number of Blades Total Prototype Height Base Diameter and Support System Gear Ratio

Thank You

Questions?