8/3/2019 Carbon Particle Disperser Final Presentation 490B

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Carbon-Particle Disperser

Aron Daria

John Terry

December 8, 2009

Advisors:

Dr. Fletcher Miller

Dr. Arlon Hunt

Sponsor:

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Introduction

Objective: Design and build a scalable

device to suspend prefabricated carbon

particles in a cloud.

Carbon

ParticleDisperser

230nm dia.Prefabricated

CarbonParticles

Carbon

Cloud

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Disperser Placement

Solar Tower

Open Brayton-cycle using a thermal solar tower

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Why Carbon? Carbon has excellent energy absorption properties

The open Brayton cycle system will be more efficient thancurrent systems, which, incorporate coolant-drivenRankine Cycles.

Higher efficiencies mean lower energy costs and less

environmental impacts Carbon particle size is critical for obtaining maximum

efficiency

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Design Process:System Simulation

LabVIEW A program was created to solve for various properties in

the system and determine whether a high-pressure system

was feasible.

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LabVIEW Results: 200 psi would be needed to include a

supersonic nozzle in the system

Conclusion:

High pressure components are expensive

A low-pressure system is acceptable to

prove the concept.

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Design Progression

Block Diagram

SolidworksCompleted System

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Key Features

Upper Chamber Easy to assemble/disassemble

Simple to clean, perform maintenance

and swap parts Diffuser Plate

Interchangeable

Different hole arrays accommodatevarious carbons

Future plates may have small electric

motors to enhance fluidization

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Key Features Cont’d

Recirculation Loop/Flow

Controllers

Unique to Fluidized Beds

Allows independent control of fluidization and cloud production

Particle Ejection Tube Adjustable height provides some

control over cloud density

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Key Features Cont’d

Diaphragm Vacuum Pump Gast DAA-V717-GB Diaphragm Pump

Sealed compression chamber eliminates the

possibility of carbon-particle malfunction

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The Build

Materials: Acrylic:

3.75” OD Tube

1.25” plate

0.125” plate

Stainless Tube

0.5”

Swagelok Fittings

Wood Stand

Processes: 3 Axis CNC:

Flanges, end caps,

diffuser plate

Angle Grinder

Stainless tube

Wood tools

Stand

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Preliminary Results:

Test: Clean air input pressure increased,

constant recirculation pressure. Result: Cloud output exists and increases

with each flow rate (predicted/desired result)

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Future Work 

Extinction Tube Calculate the extinction

coefficients (α) at

various flow rates

Desired α = 2m-1

DPS

Find the particle sizes,

and cloud densities in

real time.I/I0 = e

-αx

α = 2m-1

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Conclusions

The Carbon Particle Dispersermeets or exceeds all design

requirements

Our system produces acontrollable carbon cloud

Our final prototype is scalable

regarding size and pressure

Components can easily be

swapped to create a high-

pressure system

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Questions?

Acknowledgments:

Dr. Kee Moon

Dr. Fletcher Miller

Dr. Arlon Hunt

Dr. Sam Kassegne

Mike Lester