bottle gourd drying - Design parameters length of tray = l...

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Design parameters: length of tray = l 1 m width of tray = w 0.44 m vertical distance between trays = b 6.5 cm 0.07 m No. of openings thr which ai enters = n1 13 No. of trays = n2 12 c/s area of exhaust air outlet = ad = 3.85E-03 m2 Operating parameters: initial wt = Wi 1.52 kg initial moisture = Xi 95 % (wb) 19 kg water/kg dry solid thickness = a 9 mm 0.01 m dry bulb temperature of ambient air = Ta 34 C wet bulb temperature of abmient air = Taw 28 C temperature of heated air at entrance =Tc 80 C vel of air at exhaust = vd 4 m/s avg vel over trays = vc = 1.5 m/s pressure of atmospheric air = Pa 101325 Pa Performance parameters: equilibrium moisture = Xe 6.1 % (wb) 0.06 kg water/kg dry solid temperature of mixed air = Tbm 65 C moisture content vs time moisture content =Xa = kg water/kg dry solid dry solids = 0.11 kg t (min) t (s) total wt wt of tray wt of veg. Xa D Rw 0 0 3.29 1.77 1.52 13.44 15 900 3.16 1.77 1.39 12.25 3.3401E-10 0 30 1800 2.99 1.77 1.22 10.63 1.1465E-09 0 45 2700 2.81 1.77 1.04 8.92 1.7972E-09 0 60 3600 2.65 1.77 0.88 7.36 2.1729E-09 0 75 4500 2.52 1.77 0.76 6.18 1.7924E-09 90 5400 2.4 1.77 0.63 4.98 2.6810E-09 0 105 6300 2.24 1.77 0.48 3.53 6.0813E-09 0 135 8100 2 1.77 0.23 1.22 3.2260E-08 0 165 9900 1.92 1.77 0.15 0.44 3.3884E-08 0 195 11700 1.89 1.77 0.12 0.14 5.0052E-08 0 215 12900 1.88 1.77 0.11 0.06 0 2000 4000 6000 8000 10000 12000 14000 0 5 10 15 Moisture content
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Xa D Rw 15.01
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