Practice problem 2_Dryer_solution

Practice problem 2_Dryer_solution - DRYER The wet solid...

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Unformatted text preview: DRYER The wet solid product in an industrial process is being dried by contacting it with air in a dryer. The incoming product stream has 1.25 g H20 per g of dry material and is dried to 8% H20 at the exit of the dryer, The air enters the dryer at 100 °C and 3% relative humidity, leaving at 53 °C and 60% relative humidity. To save energy in heating the air fed to the dryer, some of the exit air is recycled back to the inlet after being mixed with fresh air at 21 °C and 52% relative humidity. .21) What is the volume of air required (m3 at inlet conditions) per 100 kg of wet product? b) What is the volumetric ratio of fresh air to recycled air (both at their given conditions)? For this question use humid air properties from the psychrometric chart, clearly indicating on the chart how you obtained the values. Gd (0 f ‘9 soiwi v j 90M - #5 are, if ‘ out: €73.06, 5 #2” ' as M Email/L: 4003.3 We'lL 1:? 22; 4'5 «if +6” if,sz A‘s W$§(4Zj)J/{)0 :; 7¢+l.2.517, .1 1501?? 2? were?er 3771/1455 447/05” #4: 4.2(7c : {5‘53 0M%; (9U? 6M1 xz‘nfiiri. ; AW code] #3 244%}? M era/1L # 5 '. Prwudémfi’l? .94, z; ,- _. 77044” r all x€r(5.$6éféjL In #2,.- Lab's ma 1% Mg 04L gm 5&7 M4: (60%) W 7 (42?) :W 146,4 Psyakquinz, afimfi; wa'c,3Z£fi awaomfiy 139% 2.71%)0 In 2 MW til-(0&7 1% 6M+#41 $5M m 495;? 697%M'74fi4r ,_., 7 0%) Psyc.hwWL 550C) 60% EH :2) M: 0.0fi%% 43894 :7 W) MP #4: myfiw (1%) W63 Mam m m0: Emit/I wt; : mags fig, §§.§f+0.6(37 :— ggéf 0,0517 Y :1540-3 23 emf WW 1% Mk wax, Sam 5) V4053 (“05/ 59k 2? \[W ; ma >< £5403 — 74ng W: ’49) ' #:L a -— 41”“ (mi/#3 m @wa wot / 5 gm 5le M53" ('W‘HL wag” ' 2?»; ‘ I [WM '- 51%) 5%. WW M'gggfl9H30'0°*%%f/ég W4 (WV-camw/%gm ‘17 Wm 7» 0,0014 , ‘ fnzfib: EC )6DA-- wwM: 55% @H2505? flfléfifim 266nm 90i§p¥£ “é flCGMXV :4-OZE5/é) 9134’; W _ We; Mmce/MW? ' ( é {Mai/(xii; : Méfi :7 0.00914 +0.03%; (9.0m M ) :7 Vu‘nfibz’ —. wni‘ t“ m H fl-n) 4‘? 330 NH 350 350 ND 350 393 4-00 Psvcrmm'c CHART l‘unmglm Iliilh l mull-immune! ' 9 m 1|qu ll' m, M! ‘llpflll'lll: ~°’ 1mm {1| u‘ .11.: I h HIGH TEMPERATURES $ V. "mm; Prunlflj25kf'l I EEALEVEI. (a? l l‘ I‘ L! I A II! m m 51 METRIC UNH'S I a __ II H II l i‘ I i"ll'lfllm“"i” "iw ‘ FIN . " r I: .9 Ilium!) m! JI‘ . E " an Equal minim“ 1| Wags: n. @ ‘STIIIMIhEIIlIIIII‘II 1M! In .1. all ‘* I ‘fl’iflfi! § 1. in.‘ l ‘ L‘ ‘ L‘ l n? '” nulmrfl Aimmln'fll In W515i! ~ autumn III! :1 H 331...: Emmi" , y 1 u A ' w #14 1 1a mull .. I .4 m. AI ‘Ffi'fi' i." was WM! 'lm Ll h.__ H I B, I I ' I ‘3 ’ ‘ llf mum till. ,l N Am.“ Hifllllilfl'llllllifl m. mull: ~ «I if "Ill! ~' mil" li'l‘lli' «Wm Fin" Ifii‘ull‘“ 'i‘i'nn‘i '9 In. In”. I.._' . u I la ‘ E SSMIIIIIIIMEHM-n ll MIME.“ m ‘ mmwmal'IWLIML I alum ' 0;} ‘3’ lung/Infrimamaggi's'qgu if“ ’51:: 0i: “° 153’ Wfii'i! ~~ 1 "w" 1‘ E gé‘ 7;: -JLI. , ._| .. . . E- w- " s-'-' w ': ‘l “ ‘l ' ' ‘3 o N] mm: M! ‘l - ..I an 1 £4? rfifing‘g’fiifinmgim H . #4:! in K '- mm ifl“§-fihl!lili!\fi .4 e, i ‘ min- 5 E yaw waimmmlmml...“ I; gun-run?“ s we: €v'€%¥’4§¥¥fifl%flififilfh "eh-’4' a? L Lr-_'fi|‘h_ .‘L_ J.— ‘1 ‘ ‘5. v .s_ Ihv.‘ « V. __ #LeeseseswWNW4v . 1‘ ‘a 1 I e;- mm A. M. n. 5.. 1i; 4... 3.4 r.“ 1..“ . 4 M Q, Magnum uJ'r'AflfifllflflflIEfi 4223mm V i‘lliiflllhifi ~ finmemsauimmfly‘imm’ imalmmmlmsnm «c» EEEE":.4:.5 ‘a: “Minna; wrxggmmm é ‘uaeaagp‘ag.1§m..fli.4aig.1 4li§§fl§ljflghifi a om §,u'bfij§?liirpf:ikihflgfiafifll aide-.2, fighfihi‘a ‘53:! gamut a \; ‘3-“3fifis’ifiifi enaasmanv'aim'zamas .5 EIfiIIflIIE \iii§T3§i§§§i§fiiflfliflfiififliiilfilisuiflfifil we: wing! maeaafiaiggaszfia!Eanamaaaimesm igtfilzsflh. in mm G gamma " 00 1,, Ezesaaseesaaaaaaaesmaimagine.{easeaaagehass mass 0 r' ‘.w‘ 1‘ P.“ H wup" 1' NIB" 1 ‘ 35 1“. Q '1‘ fill’J-‘hfigkgqafig‘h‘ggflgu-qflgggsgugygggfi.gni}!EL!-.!IL!N E33!-Eaesg:~gagg;;geagaaaa:ggggpsgaqsnsgagm.gm.g ii II Ii “$3:EaaaawasmmEms-sums»: HIIEIIMI 2|] 3|! 4 5!] BI] 70 30 BI! 100 110 120 [1 Bulb Tum entu : “c w p I Cupyriuht ©CII'riBT Carpuminn1975 GIL Nu. 194-005 Print-d in U.S.A. “E Figure 5.19b (Reprinted by permission of Carrier Carporution.) ...
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