TF1_test3_CCHattempt

# TF1_test3_CCHattempt - I e 1 V a) t.“- TF1, Exam 3...

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Unformatted text preview: I e 1 V a) t.“- TF1, Exam 3 Section4 6?: 1? Tuesday, December 04 2%? r“ :7! T . L“ 235 ‘l- . (l men 1‘ M“ i ‘ NAME. [4" Hi — Mum P; mixes m Problem 1 (7 points) Saturated liquid water at Tb = 20 OC ﬂows at 6 m/s in a 25.4- mm-ID tube; the tube wall is heated by solar irradiation to T5 = 26 0C . ﬂ: 75}! rm ‘2 O' D 2 a) Is the ﬂow laminar or turbulent '? Thigh b) Assume thatjhe tumiggmooﬂi. Find the average heat transfer coefﬁcient in the fully developed velocity and temperature proﬁle region. 0) Determine the solar heat ﬂux needed to bring the wall temperature to 26 C . A: H : we rafﬂe Pr :65t7 Pm {\30‘39/3LV'3K M: O'Doogbzé m V‘ REV” PM Reg \$1030 ‘/ l3 . , ‘00 l7 J - f. .z 1/3 I l2‘7{3) (Pr “g \ Eh: 7C” ; 03M I , R of; i; [)‘Olﬁ‘ig rwcwr mm; wall?"Le 3-5 f-A—‘t t'tueajdlrle range “V Cut Haws TF1, Exam 3 Section4 Tuesday, December 04, 2007 E, D 00026 m Problem 2 (8) points You are asked to calculate the pipe diameter needed for a ﬁre protection system, supplied form the water tower shown in Fig. 1. The pipe materials is cast iron. I!) ‘f 1 L 3%“ l w “ ‘ Determine that pipe diameter that would ‘ A; 3’} '7‘,” Provide 350 GPM. \7 ﬂ 350 {rm}: ,V M x 9" a Coll Helium Tuesday, December 04, 200? (494A “16 ﬁnal-’35? : mi. 335 “751 TF1, Exam 3 Section4 Problem 3 (8 points) In the condenser, steam at Ts=100 C and 1 atm is condensing outside 2 cm x 5cm square channels. a) Water from a river at TVFZS C, ﬂows at 2 m/s inside the square channels. The channels have roughness, e=0.26 mm. Find the average heat transfer coefﬁcient in the fully developed velocity and temperature proﬁle region. (6 points). 0.01 b) Assume water velocity is reduced to M m/s. Calculate the Nusselt number. (2 point) A I. 7 H3 tlmlic alfam’l‘er; 13‘ / Hm?! 6H 3 Q0235? we?” Rejnaiills #35 _ P V M lie , 2/ fill. Stag” lute “(b-Mu la» n wavnbeﬁmf ,_ ﬁn : ,Zibrzot/ at? Ma #0 NS/jﬂ'l-l' '1 Nu] 2.0.017 RC; Pr reeftﬂ‘ill“ 7 l Wsowwrsga REV; H [Mllle ‘ Nu: u: Mfg/1 . _ I ) #1 l - n :N M sine: (CNNle will “ﬁg; h “a : lljogo £53K Md 5 big : 3‘66 l k:ll)'Ol-5ll in K \/ at ...
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## This note was uploaded on 04/27/2008 for the course ENGR 2250 taught by Professor Borca-tasciuc during the Fall '08 term at Rensselaer Polytechnic Institute.

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TF1_test3_CCHattempt - I e 1 V a) t.“- TF1, Exam 3...

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