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Split_00039

# Split_00039 - 8.62(contd z bg 6.01 kJ 26 H = H m 0 C C p dT...

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8- 39 8.62 (cont’d) Δ Δ ± ± . H H C dT m p = − ° + = + ° ⋅° = − A z 0 217 390 0 26 C 6.01 kJ 1 mol 10 g mol 18.02 g 1 kg kJ 26 C kg C kJ kg 3 Table B.1 b g H O C 2 l , : 50 ° b g H O C H O C 2 2 l l , , 0 50 ° ° b g b g Δ ± H C dT p = = ° ° = z A 0 50 0 209 0.0754 kJ 50 C 1 mol 1000 g mol C 18.02 g 1 kg kJ kg Table B.2 b g H O , C H O , C H O , 100 C H O , C H O , C 2 2 2 2 2 v l l v v 60 0 100 60 ° ° ° ° ° b g b g b g b g b g : Δ Δ ± . . ± H C dT H v p = ° ⋅° + + = = A A A z 0 0754 kJ 100 0 40 656 2599 100 60 b g d i d i C mol C kJ mol 46.830 kJ 1 mol 1000 g mol 18.02 g 1 kg kJ kg Table B.2 Table B.1 Table B.2 2 H O(v) Energy balance: Q H m H m H i i i i = = = × = Δ out in 5 1.06 10 kJ 1 min 1 kW min s 1 kJ s ± ± 60 1760 kW 8.63 Basis: 20,000 kg/h ice crystallized. S = solids in juice. W = water 0.88 H O( )(W) (kg/h) juice m 1 l 2 0.12 solids(S) 20°C (kg/h) m 2 preconcentrate (kg S/kg) x 2 (kg W/kg) x 2 (1 – ) freezer Q f Slurry(10% ice), –7°C 20,000 kg W( )/h s kg residue/h m 4 0.45 kg S/kg 0.55 kg W( )/kg l filter (kg/h) product m 5 0.45 kg S/kg 0.55 kg W/kg 20,000 kg W(
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