MEN 310 Exam 1 with Solution, Spring 2000

, . . t : 4 ~ Notre Dante Universiny 6 ale Fao of Engineering Mechanical Enginzering Dep, tas te “1 : -] TEST- MEN310 (Heat Transfer) I ; April 07, 2000 6) Consider a pipe (8-cm ID, 10-em OD) made of stainless steel in which energy is” cae | pn vate along the thickness of th pipe wall. Determine the te: i "| _ and inner sides as well as the heat lost 6n both sides of the pipe heat into ambient air at T.=20°C with a heat trausfer coefficient of 15 Wh Pe Determine the heat lost by the rod (to the ambient air). What fraction of this heat ; loss is from the surface maintained at 150°C? 3. Solve problem } using the finite difference technique with the foliowing m (dimensions in em) esh 4 2 B 7 I ; 4 2 % sete nk ee Points: 1 (39%), 2 (30%) and 3 (40%), —_ TY = 19°C. The Soe he ISN eC Te act a x. | A768 wie =O [ap QP [2% - at? hue om: RA [seer Tre soci . ; -mZ mmx & © =Ce 4.Ge Ly me £385 Solving for C302 Cz lag. 33293; Cys 0.66703 Replaces Cy, C2. aud Oa T-Too Tod. Haste A Bap aii. dualkihoien 2s __ 4.385 % RBS 3% {- lag. S587 + 0.66703 < + 2¢ ond we 3 AT # “he Locsiien A non DOAN A Femaperoliee am 7° . pe ; 4.395% o5S 239235 e = 4.426 oleSse =O ap van naa m 7] mi” eer aes wl - i : 7 { “ @ M= C.356E€222409 __, T= 3. SEC. a ble aan Mor att AA cupid bac cn toro pute Qo. ise | er an . a ha _ ; 0.4 566 : wo G34 —_ ° U4 APRA O Guhmb © “VF | | Rate / Be atte = Wao/S/R-85/A. 1H Q, = Ty Teo = ISc -20 = {30 wee +. 38S 2G > B2.096 BF aFS Well, 14.419 | 1S 031 F6 59 | ry Solo Fore q = SRACPABS Et Wott, od G.- So-2¢ = 31 G | O_ = 94.128 13941 Wabt } . o i xleo = 84.923 / ce 43 / Refer + VYarkh 23, 2001.