Transcript Lentil Sorter Green Team Section B

Lentil Sorter
Green Team
Section B
What is the scope?
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32.9 million bushels of dry
beans produced in U.S. in
2001 (bad year)
100 million bushels of
lentils/yr produced worldwide
Many varieties
What is the customer need?
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Harvested lentils must be
sorted from chaff
Lentils must be separated
on size and quality
‘Good’ lentils get 10-12
cents per bushel
‘Bad’ lentils get 2 cents
per bushel
Proposed Solution
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For air:
(rvA)1 = (rvA)2
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Assume Dr = 0
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Therefore: (vA)1 = (vA)2
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From geometry: A = p(htanq)2
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Therefore v1h12 = v2h22
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v1/v2 = (h2/h1)2
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Based on our values of v, we find h2/h1
= 1.011
A2
h2
A1
h1
Compressed Air
Proposed Solution
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“Good” lentils = 772 kg/m^3
“Bad” lentils = 709 kg/m^3
From K. Carman:
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Chaff
∆s
∆h
Vt = 10.79 +.04Mc
Bd=1212 - 8.94Mc
Good Lentils
Equating and solving for Bd yields:
Vt, good = 12.76 m/s
Vt, bad = 13.04 m/s
This does not make sense!
Bad Lentils
Compressed Air
Existing Product
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Vibrating air tables
Sorts lentils with a
maximum capacity rate
of 500 bushels per hour
Source: http://www.olivermfgco.com/master.htm
Questions?
Green Team B
-Nut & Seed Oil Press
-Lentil Sorter