This preview shows pages 1–4. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.
View Full DocumentThis preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
Unformatted text preview: Name: Lyc; J€C M Page U4
.9
ME 37203 Intro Fluid Thermo Eng — Spring 2008
Test #3 (March 10, 08:05 — 08:55 am, open textbook only)
You do no! need rofollow any specific procedure. Use a hand—held calculator.
Use margins to write down your derivations clearly
Problem 1. (50 pt) Water is the working ﬂuid in an ideal Rankine cycle. Saturated
vapor enters the turbine at 8.0 MP3, and saturated liquid exits the condenser at a
pressure of (100 kPa.
(i) (10 pt} Draw the T—s diagram of this cycle. Clearly indicate the saturation
dome and the four states of the working fluid. 2
eHd .
PT K'L' '.‘_[c)\
> 3‘
(ii) (10 pt} Determine the quality of water at the turbine exit.
I,  * c" i'."
Answer: L i 7‘( /(7/ — a E w 3»: {,7 . K
. . ’ . ) ' _ _ ﬂ
(at. (1  L" f '2 2m \ 2,2 ’3 false 5743/4)
s7, 7 a. w’? r— 5—7 "if": ‘
7 _ {‘T/Aylxi J ‘7/ [7’5 " ﬂ”
.5: '— / if?!)  _ U
f c" M ‘75/
(iii) (10 pt) Calculate the work done by the turbine per unit mass flow.
Answer: 45d 6"  C [kl/kg] Iii'11; <1”— ﬂf fir(Cr mu
4/ Name: 4,» 7) Page 2M (iv) (10 pt) Determine the heat transfer, Qin Hi: into the working ﬂuid as it passes
thrOugh the boiler. ' “Swag72743— [kakg]
6cm Aft ‘: hurlw I
Q h; + 113 (F4 : {ﬁejgjt /. IOoKX/O (€060~da/
—— 575?. 76 be 173 = 5 7c . é! WHO?
_ r_ I _.3 ..
7,13: /. mag/rm 3 M/é/
(v) (10 pt) Calculate the thermal efﬁciency of this cycle. Answer: Lift/h; — we ,9; (In—gt)? (ﬁr/7:)
? ﬂ/ “Aft 4&1; — guy
20?? ’3 2 2077’? % Problem 2. (30 pt) For the stationary unknown ﬂuid
fluid shown in the right ﬁgure, the
absolute pressure at point A is 200 1m
kPa and that at point B is 220 kPa. The density of water is 1000 kgr’m‘l
and g=9.81ms’sz. 2m p=lSOO kgfm3
p3 =220 kPa Name: Pitta 4’? M Page 32’4 (i) (10 pt) Detennine the absolute pressure at point 1. Answer: / ?C(’ [kPa] Parr/7f + 36 r‘2 A :00 X $48M? ,
/z X/ Ag: ﬂ: X00 “ /550
s, MAM £51 (ii) (10 pt) Determine the absolute pressure at point 2. M [kPa] Answer: I73: B. was ffochQg/X»? 1. /(/m(§7 5% E : “225) a — #2743 (iii) (10 pt) What is the density ofthe unknown ﬂuid?
Answer: [kg/m3] Z : ﬂ +3442: //‘000 (Jet '= /,5‘?0C7 (ﬂJ/€ ) t “5'0? é; fit1756‘}? Name: Page 42’4
9,.
Problem 3. (20 pt) Water ﬂows from
a tank that has a hole as shown in the  ~ v /
right ﬁgure with negligible viscous
effects. The density of water is
3 _ 52
1000 kgx’m and g—9.81mfs . water
5 m
D = 0.1 m
'2;—
1 m
(i) (10 pt) Determine the velocity of water exiting through the hole.
Answer: 9‘66 [mfs] P1 + ég’l/ult 3’5: 7 Pg +31—(J1/57L r81 ﬁre/9‘2 W { eye) "__I' l ‘ 2‘: 3/{8’l21
L‘iﬂc > AKi/z )7 ) V2“— VW t ell?£/X8 = 6.8% )4/5 (ii) (10 pt) Calculate the mass flow rate of water passing through the hole. Answer: [kg/s] x 7; CL
771 “3 play'9 : M05 x 995 X T/CMU ~= 6W ...
View
Full
Document
This note was uploaded on 04/28/2008 for the course ME 3720 taught by Professor Lee during the Spring '08 term at Georgia Tech.
 Spring '08
 Lee

Click to edit the document details