This document provides a 10 step design for aeration of bulk corn storage in a 6m x 5m x 4m bin. It involves: 1) Selecting a design moisture of 13% and calculating generated heat of 149.66 kJ/ton/day. 2) Determining the design day based on local weather data and calculating equilibrium relative humidity. 3) Determining hours of operation per day as 6.5 hours when RH is below equilibrium. 4) Calculating air needed as 49.88 kg/ton/day for a 3°C temperature rise. 5) Selecting a 20" diameter, 3HP fan that can deliver 45.5 m3/min of air

1. YAKINDRA P. TIMILSENA ID No. 111332 STORAGE DESIGN FOR CORN

6. Table1 Rate of deterioration constants for some common cereal grains. ( To compute CO 2 generation ) Grain A B 10-13.2% 13.3-17% 10-13.2% 13.3-17% Corn, yellow dent 0.17 0.27 2.00 3.33 Sorghum 0.125 0.32 1.65 4.19 Rough rice 0.21 0.44 3.04 6.08 10-14% 14-17% 10-14% 14-17% Wheat , soft 0.090 0.36 1.35 5.14

11. Table2 Chung-Pfost equilibrium constants for grain. Grain Constant A B C E F Beans, Edible 1334.93 14.964 120.098 .480920 .066826 Peanut, Kernel 506.65 29.243 33.892 .212966 .034196 Peanut, Pod 1037.19 37.093 12.354 .183212 .026383 Rice, Rough 1181.57 21.733 35.703 .325535 .046015 Corn, Yellow dent 620.56 16.958 30.205 .379212 .058970 Soybean 275.11 14.967 24.576 .375314 .066816 Wheat, Durum 1831.40 18.077 112.350 .415593 .055318 Wheat, Hard 1052.01 17.609 50.998 .395155 .056788 Wheat, Soft 1442.54 23.607 35.662 .308163 .042360

15. Table3 Cubic meters occupied by a tonne of grain Grain Cubic meters/Tonne Rough rice 1.72 Maize 1.39 Wheat 1.30 Oats 2.43 Peanuts (Virginia) 4.27 Sorghum 1.37 Barley 1.55

16. Step 8 : Select fan = 59.30 m 3 /min = 1.98 m/min 6*5 P = 53.7 V 1.32 Where P = Pascals of pressure drop in a meter V = Apparent velocity, in m/min Static pressure of rough rice : From step 7

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