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MAE204_F11_Q2_Solution

# MAE204_F11_Q2_Solution - MAE 204 Fall 2011 Quiz#2 Name A...

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Unformatted text preview: MAE 204 Fall 2011 Quiz #2 \ Name: A 4‘; Recitation: Instructions: 1. You have 15 minutes to complete this quiz. 2. No notes or calculators allowed. 3. Circle your answer. 4. Show all work. 5. Assume that gravity is 9.8 m/sg. Problem 1: w One side of an insulated wall is held at 60°C while the other is exposed to air at k=0'017nTC 10°C. Assume that the thermal conductivity of the wall is 0.01 W/mOC. Assume that the convection rate on the side exposed to the air is zero. 00 § Tai,=10°C w (a) What is the temperature of the wall next to the air and why? Q3841“) 2 hp‘ (‘TS- TQ'V‘\ :0 A AX hiCD A— (340 Hm Tp’l‘otsz =7 SEAR»: lOOC-l (b) Assuming that the heat transfer rate per unit area is 5 W/m2 what is the' wall thickness? ‘0 CPC-‘WCX :_ k, A M _.__ QLMD Vi ET 2 ill TmteH ~R~m~ Problem 2: A small turbine is placed on the end of a 1 m2 pipe with water ﬂowing at a velocity of 2 m/s. The turbine empties into a still lake and the density of the water is 1000 kg/m3. (a) If you are interested' 1n the power generated by the tu1bine draw a possible system to analyze. Petra ..—v~—~—~_. (b) What is the power generation potential of this system? be)? (‘3 bL Ark men) S‘kﬂb (\QLC +knoush \‘K ‘l‘wiodxe,’ M:— PU \j: Ugﬂum glow belt, \3 .. AV A: Cm»; geCAﬁO/VA Owes o'— \f: Uekoul/ =3 V=Um WM!) 2 2 ”7‘75 :5 m 1 [woo THE—«Mamvsl : QOOQ lis/3 The, pa MP 9e weir—inn Pastmxﬁi F3 0; (QMCLH’I‘A “Q method) A A . .. ‘9‘ \ Q ”(\ch E :2 m '58an YR Exhibit: -\~ VLL—\[9a°t —\- SiF‘Bq“ Qzuﬁi] P Q [\\o \(\2.)S\\\~ Chcmgc was WASWWO =23 ASSN (92M: 91.1% A 5*.“ \lec. “\(‘McsxeA ERG? Umué; :0 1 (S \ KO op¥l0m (\CSW‘SMS JENSBW‘E, gDXYh 0m 01prka I (D P\q — pop—l; Lgsk-h CUNQ Pg¥m> “a e. Ungx a. If) We“ 5’ m “if: 30ml? UZ/sﬁﬂuook “m \Mm a =\C50<3 T 2‘1000 —%Z \csoo Lo Problem 2: A small turbine is placed on the end of a 1 m2 pipe with water ﬂowing at a velocity of 2 m/s. The turbine empties into a still lake and the density of the water is 1000 kg/m3. (a) If you are interested in the power generated by the turbine draw a possible system to analyze. (b) What is the power generation potential of this system? C?) Agsm ‘ERCAT Etnvpcut 2 ESE/V} ‘ Thfq E 2 (Y: iﬁgidu‘t V\9\ \mcc Ari“: pm Luca he? SP'CCILPCD YOJ W960 JN ““qu o\ thoice . Erika Ch ‘ \\<\ ﬁrm ccmi€x¥ 6% 3%“ C(U‘JHOA' ...
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MAE204_F11_Q2_Solution - MAE 204 Fall 2011 Quiz#2 Name A...

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