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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