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Charcoal Briquettes Mockup Review

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.

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Charcoal Briquettes Mockup Review

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  1. 2.009 Blue Team A Dexter Ang, John Brewer, Kevin Chen, Greg Fonder, Danny Hilton, Matt Krueger, Andres Pino Charcoal BriquettesMockup Review October 21, 2004

  2. Key Challenges Loading Hopper design Position of feedscrew Output nozzle Length Diameter

  3. Emulating Bagasse, 1 • Raw bagasse not yet available (harvesting now) • Instead, crushed charcoal briquettes to emulate carbonized bagasse

  4. Emulating Bagasse, 2 • Crushed charcoal then sifted to remove larger pieces

  5. Mixing • Crushed/sifted charcoal mixed with tapioca binder to form extrudable mixture

  6. Extrusion with Meat Grinder • Used 3/4” diameter output nozzle • Good briquettes, but poor loading from hopper

  7. Benefits of Extrusion • Average density of 0.95 g/mL (extruded), compared to 0.48 g/mL (hand-formed)

  8. Concept Mockup • Utilizes 2” OD earth auger bit • Designed to test configuration of hopper

  9. Improved Hopper Design • Feedscrew loads from all directions, not just from above • Continuous feed without additional input

  10. Playing with Nozzles First used short barrel (2” diameter) that tapered to a 3/4” diameter nozzle Generated large thrust forces Too much for our thrust bearing Then used longer barrel without any taper (2” diameter) Produced fairly good briquettes

  11. 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

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