This preview shows pages 1–3. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
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
mmID 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
35 fA—‘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 “(bMu la» n wavnbeﬁmf ,_ ﬁn : ,Zibrzot/ at? Ma #0
NS/jﬂ'll' '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)'Ol5ll in K \/ at ...
View
Full
Document
This note was uploaded on 04/27/2008 for the course ENGR 2250 taught by Professor Borcatasciuc during the Fall '08 term at Rensselaer Polytechnic Institute.
 Fall '08
 BORCATASCIUC

Click to edit the document details