quiz5L01 - Department of Chemical and Petroleum Engineering...

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Unformatted text preview: Department of Chemical and Petroleum Engineering ENGG 311 (L01) Winter 2003 QUIZ #5 Tues A ‘l 2 7 int u i Roo :IT1 -_ Univers of Cal - a Surname Given Names Student ID Number —w NOTICE ‘ ‘ 1. Reference to ONLY the text book is permitted during the quiz. CLOSED CLASS NOTES. 2. Please state any assumptions made. wherever necessary. 3. This qulz consists of a total of three questions: 4. 0181 02 - 5 marks each. 03-10 marks All types of electronic calculators are allowed. However, all communlcation interfaces MUST be deactivated. 1. Determine the minimum theoretical power required to drive a heat pump operating at steady state between a Mass at 20 "C and the outside air at 0 °C. Heat transfer through the walls and roof of the house is 2 x 10° K] per day. _ hapl- l . ‘17:” ji§= £911. We. T¢=0+anp T L “M14” 111- 20+.273 to: 2.6mm 2. Two reversible power cycles are arranged in series. The first cycle receives energy by heat transfer from a reservoir at TH and rejects energy to a reservoir at .temperature T. The second cycle receives the energy rejected by the first cycle at a temperature T and rejects energy to a reservoir at Tc. If Tc<T<TH. derive an expression for T in terms of Tc and TH when the net work of the two power cycles is equal. Wat, Wat,- QH Q {R at. '1" T T‘- —I—I_sr——- rag—“€34 KYL— . T“ " .Q“ 9 .1.“ Q“ . 41r— l- E; t — 92;, 12; ‘@c~"@wr 'T Q 'i Q ' mw‘bdmu: Wait, = gfi'gb 1 {quail/F " m4“. baa-lama: Wujc, = Qn—Q :(tqumg c” W°‘5¢1= Q'Q° Vi“ Q“_Q= Q—QL flaw ummze m 3. One kilogram of water executes a Carnot power cycle. During the isothermal expansion, the water is heated until it ls a saturated vapour from an initial state where the pressure is 15 bars and the quality is 25%“ The vapour than expands adiabatically to a pressure of 1 bar while doing 404'kJ/kg‘ony0rk. ' ' a. Sketch the cycle on the p-v oobrdinates provided. b. Calculate the thermal efficiency (96). c. Calculate the work done during the isothermal expansion (lo). d., Calculate the heat transfer during the‘lsothermal expansion 00). : BONUS: Calculate the quality at the and of the isothermal compression (3 extra marks) ‘ ml‘il \oaxs- 28K (4. ‘_ ' ‘ emz'srz vhf: meg-51% _ 54:11.12: 13 bus 4* saw vapr Is shite E mute who am? do cm W barle dor pMU/Y)’ .2933 ‘QJé—‘Wz3= “wt'ua-m) ‘ ‘ 5) wig l: IMFIXL‘uS 2’ £390 amay’c I OJfiACQ-a ' v W13 1404 0:} WC 1'4 S4118 Vapour 55606.; . , : 404K; ' fl>= 25ml. 5 ICE/1E5 \’2 = O-l3l3’ m3/k5 “L :. o 60d; “'0 bxpregimdzx we? 7'. r, _ _ r _ 403 [(5 ="l [54'qu 2394.51 res/13 => mung—7 “3/18 Ma 0‘1- A m: T3: “ta-693°C =1}:ng 7‘3 : “Eli's”— -= :L 0.85 .'. 3H1“ :l‘“ C2 PM 95"” zsos.l—4lr~3b M69“- aLnd 31m 4 lad/Jo '2 Plan/w. si’lu— Qt 46% @P’oq/Vf’, ' Ltézl. +0. be cm madam; _ “TH” ' “Gianna; - ‘ I ; KC) wofkuflme, _duuim% Aid-WW. W'F" = i; buJ Wu =5?d\l : P‘( 0243') 6P'1p’fl: I _ , , 0: L9 '1' ., I ._ t.9 + 3 who: (9. e. (l 9025):) ‘§33_E'33+ 01; (04313) = 0.03382m /5 WWW 9‘ amide-04” twee» a. , ,. r ‘- , * Wu, = is Do lc?o\*[/o.\3‘ls '0935823 rm /lL_3 '19 W11 :_ lefl? [5» flaw; w v 77 Md- Wwda duwi 436 fill/monk w?amMm Q\l"W\L= ’W‘C'V‘l‘ ul; C\—’=2/.)\J++ 1W8 VJ-\'),+ WCUL’U') Qu = ' . , V (gm: MbA'ilrES—V Haj (2S‘M‘S— \mDVJ/kj Qu, 1 “‘1an 5 K3. 0 . = Ll—o.as\[email protected]$.te\ k O'ZSC’zsqqsyz an IE. EOMM : fr): v1.14 MIL—5+ qu+ WI-u CD”. 0.200;: /‘r6.91+(‘/oqk37k1}nk3)+ w“ mm Heas k3 W54 '-‘- S POW = 'PSCUq-Gs) gnu, T5=P4= Caryl“!ch m2ka 6% —— LVLHDQ+ “3‘93 ~ ' k9” 7f— rvl(l'(~})(|]\.:04>?°;)<e -= “[3ch 4-H-«IOI3LE—3 w 12,0 1494E"’I,-,.~6325éx14 +:;;o«i>ze*~s— vim/+1 * If'“w§o" '1 "‘[bq.iQ¢\éD X4 "‘ 1925-:1‘4 “ MCMV‘MH) ~‘ 0’ a‘fiw‘hD «W4! = ’W\(’uq—M,) Mu: a ‘ M I“ H ' _ ‘49s?:9“':“‘»‘),t4‘A7'%3w+ 1% 2:951)" . w =‘ ‘4l_"1.--f$€-r“9,088114 x“ , . ,, M" ‘4 "‘1‘?"3“[H‘Tfibtzomu x4 ‘~—izel] *3/16; . - Wm 7' ’36364 - V ‘<‘,_",r.v'. ‘ . ,. 0.2.061: 1%.qu +46%? led-Maxi9131744862$44 épééflxy ' ‘ ' 'leo.S“---* ‘- 5 ~ .~=> gowns, '1»; 0331‘ g V ...
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