Elementary Principles 312 - 8.58 (cont'd) Energy balance on...

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8- 33 8.58 (cont’d) Energy balance on 1st effect: Δ ± ±± ± . ± ± ± Hn n n nv n n =⇒ + + = = = = 0 2654 360 605 2738 5000 1131 0 2534 21 5 3182 1818 5 1 2 bg b gbg b gbg b gb g b g kg H O h 2 c. Mass balance on 2nd effect: 3182 34 = + nn (1) Energy balance on 2nd effect: Δ H = 0 n n 43 2 1 12 6 2610 252 360 2654 360 0 3182 1818 5316 10 252 2610 b b b g ++ −= E == ×= + , . (2) Solve (1) and (2) simultaneously : ± n 3 1267 = kg h brine solution ± n 4 1915 = kg h HO 2 v Production rate of fresh water =+= + = 24 1818 1915 3733 kg h fresh water Overall S balance: 0 035 5000 1267 0138 .. = xx kg salt kg d. The entering steam must be at a higher temperature (and hence a higher saturation pressure) than that of the liquid to be vaporized for the required heat transfer to take place. e. 0.965 H O( ) 5000 kg/h l 2 (kg H
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This note was uploaded on 02/27/2012 for the course CHEMICAL E 312 taught by Professor Cheung during the Fall '11 term at The University of Akron.

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