charcoal briquettes mockup review

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2.009 Blue Team A Charcoal Briquettes Mockup Review 2.009 Blue Team A Dexter Ang, John Brewer, Kevin Chen, Greg Fonder, Danny Hilton, Matt Krueger, Andres Pino October 21, 2004

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2.009 Blue Team A Dexter Ang, John Brewer, Kevin Chen, Greg Fonder, Danny Hilton, Matt Krueger, Andres Pino. Charcoal Briquettes Mockup Review. October 21, 2004. Key Challenges. Loading Hopper design Position of feedscrew Output nozzle Length Diameter. Emulating Bagasse, 1. - PowerPoint PPT Presentation

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Page 1: Charcoal Briquettes Mockup Review

2.009 Blue Team A

Charcoal BriquettesMockup Review

2.009 Blue Team A

Dexter Ang, John Brewer, Kevin Chen, Greg Fonder, Danny Hilton, Matt Krueger, Andres Pino

October 21, 2004

Page 2: Charcoal Briquettes Mockup Review

2.009 Blue Team A

Key Challenges

LoadingHopper designPosition of feedscrew

Output nozzleLengthDiameter

Page 3: Charcoal Briquettes Mockup Review

2.009 Blue Team A

Emulating Bagasse, 1

Raw bagasse not yet available (harvesting now)

Instead, crushed charcoal briquettes to emulate carbonized bagasse

Page 4: Charcoal Briquettes Mockup Review

2.009 Blue Team A

Emulating Bagasse, 2

Crushed charcoal then sifted to remove larger pieces

Page 5: Charcoal Briquettes Mockup Review

2.009 Blue Team A

Mixing

Crushed/sifted charcoal mixed with tapioca binder to form extrudable mixture

Page 6: Charcoal Briquettes Mockup Review

2.009 Blue Team A

Extrusion with Meat Grinder

Used 3/4” diameter output nozzle

Good briquettes, but poor loading from hopper

Page 7: Charcoal Briquettes Mockup Review

2.009 Blue Team A

Benefits of Extrusion

Average density of 0.95 g/mL (extruded), compared to 0.48 g/mL (hand-formed)

Page 8: Charcoal Briquettes Mockup Review

2.009 Blue Team A

Concept Mockup

Utilizes 2” OD earth auger bit

Designed to test configuration of hopper

Page 9: Charcoal Briquettes Mockup Review

2.009 Blue Team A

Improved Hopper Design

Feedscrew loads from all directions, not just from above

Continuous feed without additional input

Page 10: Charcoal Briquettes Mockup Review

2.009 Blue Team A

Playing with Nozzles

First used short barrel (2” diameter) that tapered to a 3/4” diameter nozzleGenerated large thrust forcesToo much for our thrust bearing

Then used longer barrel without any taper (2” diameter)Produced fairly good briquettes

Page 11: Charcoal Briquettes Mockup Review

2.009 Blue Team A

Conclusions / Further Work

Meat grinder proved viability of extrusion, revealed issue with loading

Concept mockup validated an improved hopper/feedscrew interface

Further work needed to improve thrust bearing, optimize nozzle