plus
QUIZ no. 4 : ME133: THERMO 2 - SECTION E01
3
sN, GN Mr. 6 fl[rDlr0 grBhl oenq: lthlTgtl-L, sEAr NUMBER tSN] I
.#Y
Note: make sure you fitl up the "Summary of Aiiiwers" Tabte betow or moke a written summory of answers.
Attoch your solution to your summory ofanswers.
REGENERATIVE CYCLE WITH ONE CLOSED HEATER: Fill up the blanks with your answers below.
1. A steam power plant operates on a reheat regenerative Rankine cycle with a closed feedwater heater. Steam enters
the turbine at 8 Mpaa and 500 deg C at a rate of 15 + (a0/SN) kg/sec and is condensed in the condenser at a pressure of
20 kPaa. Steam is reheated at 3 MPaa, 500 deg C. Some steam is extracted from the turbine at 1 Mpaa and is completely
condensed in the closed feedwater heater and pumped to 8 Mpaa before it mixes with the feedwater heater at the
same pressure in a mixing chamber. The Terminal Difference for the CFWH, (i.e., the difference between the
temperatures of the fluids leaving the heater) is 5 deg C. Assuming an isentropic efficiency of 88 percent for both the
turbines and the pumps, determine:
SUMMARY OF ANSWERS:
1. Equipment Layout and TS diagram for the (in separate sheet)
cycle
2. ldeal extracted steam for feedwater o.n
q
,14
heating in kg/kg
3. Actual extracted steam for feedwater
heating in kglkg
0.lel!9
r(g
4. Actual energy chargeable (KW) sq3qq.g rw
5. ldeal engine efficiency (%) 4t.33%
6. Turbine work, actual (KW) 2ls5g.s7 td
7. Actual Cycle efficiency using Pump and
Sbsolo
Turbine works {%)
8. Brake Work in KW if friction loss at the
turbine is 4 % of actual turbine work. 10q$.fq rw
9. The torque measured at the shaft ln KN-m
if the generator is running at 3600 rpm for a
brake work in item 8.
1"0. Combined Steam Rate (kelKW-hr) if
generator efficiency = 95Yo
rTHEQMooyNeMrcs
2 @
=hs. Ps, O.olMhq \,,ry, g0{o
o St.'?12o6, -
P, a PM?ogt hrt, - (rleCh,-hl) -h, )
Kg'(
I' SoooO
h," s8.3t
tr5g,1.ol&J2. U' grsq.r,t
9'a
' 6flqg-El
g, z
(9.K *l9.K
9. ' z'2BP h,r': -(0s(hg -h+ ) -1,,r)
@
Pz
x=90.4b0i hqt- 3t57.12fi
'3M?oq
ssyt^Hsfi* *r|bg. hs',-(tre(hlr,u) "h3)
lu'tu
hs:!!gtl.'t)ts.
S9r,3.5ttlX& qg \r-
v lSlg.#D,A
aJ
52> bJ240.9. @ E
1(9'K Pr,, 002 tvkq hrt, h1 -lL . ,^ '
Yf tnu
115.t1
s5
1o (sr'htxrSgn) Vfc, l.o t1?x ws trQ f
htl '8H Lbo'64?'
6.104t5 3oqt. b l,L, ,sr.qo!
z5r'qu= €
b.'l2tl} h2 h,''
b.1t+Lg gtt5.3 ;". \- '', ,,
- ltflgqq *
hgz?to?.b7 9Tq hq'xunnuq no78a
l,:;Ift (h-?o)),?.$
OJ hl 1,59 .52L
tE{.Il
fg
" 3tvlhq
=
tlz fiOo(t
a
hg'l4sto.s K) @
6
sl'1'WP o
Pe = lM0oq
hp" 7b2.8tfi
r.9
qnl
o gp, t.1273 Tios F9
01'lMho
s5o'2.1397 c o Pq'8lY,lho
ry.k
sigg'4 .qtt7ir_9
rg.-r,
h.he,(vrr(&-h))#P #^
5q' 7. tg?f -Y hq= 770.70iI
'K9
$.K
S.h
1,LgtP zls.z @
lLW hq Qp'aMflrq
1,2W7 l$6.4 t*@rmPao ' lTqQl oc
Im,ncr' -tD
hl. Sllb.at fi \
yz lt4.b7 olot , [q.ql og- So(.t
fpo,rou r 17{.910(,
t7{.o
r rk
1td.n
t7q.qt ht,
r75 xt tl
TflgeMo0yr.nUr(6?- F
0urz 4
0 ?-+++--a- *
UJ
$Bleffi
rr{tPm W GH
lYr - lt1
0,?Ltt!r4p
rnr $+!! b
@ arh 8?
n,Lo9
s
(ft'1) m -ra,) ht
hn rrr, hf
( h.rvl,)(h7) + firh4: (n-q) (hro) +mlhg
0r = 3./t Kg
s
, 0.V Kg
Ytl'
ru
a
t.
(r,-r,' ) (ht ') , (r,'h,,' , (il-r,r) (h,o) + m1,hgr
rhr = 9.3tf
I
,yl,l
d = 0.tb7 ry
tr
Ll
mhg (rn-u,) ho
rYl, h q
(m- m,)(h,o)* m,h9 .
rrhg
hB, rul.?L P
ry
(ryl- ry,,,' )(h,o)*,yt,'
hq,'rhet
hb
'' T74g.1sg
€
Fc', rn (h; -hsr
).6 (!ts-hr')
5. et,iL . too%
EC
\k'r(h, -hz) t rn(hstq n (rr_rr,,)
) (h{_hs)
wt. 248rlo.{s
tcw
EC" ,n(hr-hs), ,r, (ha-ha)
[c'ht0g.4 rrr.r
e1 " 41.33 o{o
b.
Wt', u.,thr-hi
) +(l rhq' ) * (ry1-rn,')( ho,-hs,
q' , 2l8sg .51 W )
1
e ,'= tt/r'
'il*'- ' loo %
0^'-
*{d' ( ffi'fi,' ) (hr'-ho) +,Yr,r (hq'-hr)
[.lpr= l&.F/ r<w
0^" *(h1-hg') t, (l,g -I,r,)
or". Sqlqq .8 Kw
t- gb.s 0/0
I ' \il6=1rhl{'
tls. o.gb
lds . 20QBB.te
r<w
