CT Thu va TB cap2

8/17/2019 CT Thu va TB cap2

1/15

§å ¸n m«n häc C«ng tr×nh thu vµ tr¹m b¬m GVHD: TS. NguyÔn V¨n TÝn1. c¸c th«ng sè tÝnh to¸n

C«ng suÊt thiÕt kÕ: 70 000 (m3/ng)Cao tr×nh mÆt ®Êt: 24 (m)Cao tr×nh mùc nc ng!m: 22 (m)"ùc nc thÊ# nhÊt trong $% ch&a nc s'ch: 2 (m)

* s+ ,-ng nc kh«ng ®i.u ho: h 13* th+ng cÊ# nc c ®i 5 ®!u m'ng 6i+ gi8 6m 9i*c trong ng: 24 gi8Cao tr×nh mÆt ®Êt t'i ®i%m tiÕ# ;ng h«m sau tr'm c $Hm 6m 9i*cIJu 6Kng ,o tr'm $Hm cÊ# $Lng 6u 6Kng cGa $Hm:

Mtr 1 M$ 1 2NOMng"8i chPn gi8 cQn 6'i tr'm c 2 $Hm 6m 9i*c song songI Ju 6Kng

cGa tr'm $Hm 6


2/15

§å ¸n m«n häc C«ng tr×nh thu vµ tr¹m b¬m GVHD: TS. NguyÔn V¨n TÝnChSn sH $T $Hm:

@ + $Hm 6m 9i*c: 2 $HmI@ s+ $Hm ,ù trU: $HmI@ + $Hm chUa ch>: $HmI

2'3trongngµy

4%ngn(ct'5uth6

4%ngn(c

b¬m

4%ngn(cvµo"µ'

4%ngn(c r7"µ'

4%ngn(cc8n$¹'

trong"µ'

Sèb¬m$µmv'9c

:;ng :;ng :;ng :;ng :;ng0V 3 2IN V 0I442 I00= V2 3I2 2IN V 0I=42 0I3=4

2V3 2I 2IN 0I0N V 0I422 3V4 2I= 2IN V 0I042 0I3N0 4V 3I 4IR0 I0R0 V I470 2V= 4I 4IR0 0I4R0 V IR=0 2=V7 4I 4IR0 0I00R V 2I00 27VN 4IR 4IR0 V 0I30 I740 2NVR 4IR 4IR0 V 0I30 I430 2RV0 I= 4IR0 V I00 0I420 2

0V 4IR 4IR0 V 0I30 0I0 2V2 4I7 4IR0 V 0I0 0 22V3 4I4 4IR0 0IR0 V 0IR0 23V4 4I 4IR0 0I4R0 V 0I=N0 24V 4I 4IR0 0I4R0 V I70 2

V= 4I4 4IR0 0IR0 V I3=0 2=V7 4I3 4IR0 0I2R0 V I=0 27VN 4I 4IR0 0I4R0 V 2I40 2NVR 4I 4IR0 0I0R0 V 2I230 2RV20 4I 4IR0 0I0R0 V 2I320 220V2 4I 4IR0 0I0R0 V ./1< 2

SV: )*' Nh+t ,'nh -1/ 0 /,N -3-


3/15

§å ¸n m«n häc C«ng tr×nh thu vµ tr¹m b¬m GVHD: TS. NguyÔn V¨n TÝn2V22 4IN 4IR0 V 0I20 2I200 222V23 4I= 4IR0 V 0I020 2IR0 223V

24 3I3 2IN V 0I742 I4NN 2CTng 1# 6ùc ?u c!u t'i ®i%m tiÕ# ;


4/15

§å ¸n m«n häc C«ng tr×nh thu vµ tr¹m b¬m GVHD: TS. NguyÔn V¨n TÝn

@ ∑h 1 h, @ hc$: Ang tn thÊt ># 6ùc tr?n ®8ng +ng h# 6ùc ,ù #hQng khi tPnh to>n 6Ê $Lng (m)

• \>c ®Xnh tn thÊt tr?n ®8ng +ng h

$Hm)2 kho>: ξ 1 2I 1 2

2 cc ®Xnh tn thÊt tr?n ®8ng +ng ®E:

h® 1 i®6® @ Σξ®g2

92

V ChSn +ng thf# ®8ng kPnh b 1 =00 tHng &ng 9i Y 1 0 9 i 1034 (m/00m)

APnh to>n 9i ®8ng +ng c n?n chSn itPnh to>n 1 2 i 1 2I03 1042 (m/00m)

V AhWo mÆt $Lng 9 mÆt ct gian m> ta tPnh ∑ξ® nh sau:

SV: )*' Nh+t ,'nh -1/ 0 /,N -5-


5/15


Ar'm c: V c«n m5: ξ 1 02 V 2 kho> : ξ 1 2I 1 2

V 2 chU A : ξ 1 2I 1 3

V 2 c# ton #h!n: 1 4 @ 32 @ 1 4R2 (m)I

/. ChAn m¸y b¬m AhWo tPnh to>n tr?n ta c:

@ Mtt 1 Mtr'm ma;:2 1 44=2 (6/s)@ 1 4R2 (m)bùa 9o $i%u ®D h* 6o'i $Hm jmWga ` jmWga Y n 1 40

9Qng/#h $Hm (trang 67) ta chSn ®Kc $Hm nh sau:$Hm 6 tm trec ngang jmWga 300V43^I d ,eng $i%u ®D ,-ngcho $Hm jmWga 300V43^ (trang 126) ta m> $Hm ta tra®Kc c>c th«ng s+ cGa m> $Hm:

@ + 9Qng Zua : n 1 40 9Qng/#h


6/15

§å ¸n m«n häc C«ng tr×nh thu vµ tr¹m b¬m GVHD: TS. NguyÔn V¨n TÝn. TÝnh b¬m chB7 ch¸yV li sd ®>m ch> ; ra trong gi8 ,-ng nc 6n nhÊt khi ® 6u 6KngchUa ch> $Lng 6u 6Kng trong gi8 ,-ng nc 6n nhÊt cTng 6u 6KngchUa ch> ?u c!u:

N7N30I33=00

000I

00

70000I=Mcc =+= (6/s)

⇒ 6u 6Kng tr?n +ng h# cGa m> $Hm: cc 1 ®h @ Σh @ h,ù trU Arong ®:

@ ®h 1 :c"]A]^C]_" A\"J +∇−∇_"

A\"∇ : cao tr×nh mÆt ®Êt t'i ®i%m tiÕ# ;# 6ùc ?u c!u t'i ®i%m c ch> tr?n m'ng 6i: c 1 30(m) ⇒ ®h 1 2= ` 2 @ 30 1 3 (m)

@ ∑h 1 h, @ hc$: Ang tn thÊt ># 6ùc tr?n ®8ng +ng h# 6ùc ,ù #hQng khi tPnh to>n 6Ê $Lng (m)

^Hm chUa ch> 9 $Hm sinh ho't c-ng ,-ng chung +ng h $Hm (trang 11I) ta tra ®Kcc>c th«ng s+: 9Bn t+c (9h 9®) 9 tn thÊt ®Hn 9X i (ih i®) nh sau:

+ng h# cGa $Hm chUa ch> nh hHn cTt >#

cGa $Hm c«ng t>c n?n ta chSn $Hm chUa ch> c-ng 6o'i 9i $Hmc«ng t>c: $Hm trec ngang jmWga 300V40^

SV: )*' Nh+t ,'nh -1/ 0 /,N -7-


7/15

§å ¸n m«n häc C«ng tr×nh thu vµ tr¹m b¬m GVHD: TS. NguyÔn V¨n TÝn@ + 9Qng Zua : n 1 40 9Qng/#h chp c!n m5 th?m $Hm cho 6m 9i*c song song

9i c>c $Hm c«ng t>cI J 9 $Hm c«ng t>cI ]h 9B tr'm c

tÊt c 4 $Hm c-ng 6o'i jmWga 300V43^I

SV: )*' Nh+t ,'nh -1/ 0 /,N -8-


8/15

§å ¸n m«n häc C«ng tr×nh thu vµ tr¹m b¬m GVHD: TS. NguyÔn V¨n TÝn. Dng "3ng "Ec tÝnh.1 Dng "Ec tÝnh "3ng èng vµ "Ec tÝnh tFng c>ng cG7h7' "3ng èng trong tr3ng h%? b¬m n(c s'nh ho¹tH

Aa c c«ng th&c: +ng 1 ®h @ ∑h ()

+ng 1 ®h @ IM2 (2) AF () q (2) ta ®Kc: ∑h 1 IM2

Arong ®:M: Ju 6Kng tPnh to>n cGa +ng ®E 9 +ng hn:

M M «®

h M2

« 1 ®h @M2

0 0 40I00002

3 0 4

200 00 40I00002

3 0I23 4I23

400 200 40I00002

3 0IR2 4IR2

=00 300 40I00002

3 2I07 47I07

N00 400 40I00002

3 3I=N 4NI=NNR2

I44=I

2 40I00002

34IN

0 4RIN000

0 00 40I00002

3 I7 0I7

AF $ng tPnh tr?n ta ,ùng ®8ng ®Æc tPnh mTt ®8ng +ng nh sau:

SV: )*' Nh+t ,'nh -1/ 0 /,N -9-


9/15


lSi 6 giao cGa ®8ng ®Æc tPnh tng cTng hai ®8ng +ng (C2)9i ®8ng ®Æc tPnh tng cTng hai m> $Hm (MV@2)I 6 ®i%m6m 9i*c chung cGa h* th+ngI

V M 1 R2N0= (6/s)V 1 4RR7 (m)I

V AF ging sang trec tung ct ®Æc tPnh mTt $Hm t'i ®i%m ^I Aa c ^ 6 ®i%m 6m 9i*c cGa mTt $Hm khi h* th+ng c hai m>

6m 9i*c song song tr?n hai ®8ng +ngIV M^ 1 4=403 (6/s)V ^ 1 4RR7 (m)I

V AF ®i%m ^ ;>c ®Xnh tr?n $n 9 c M^ 9 ^ nh tr?n ta ®a tr5 9.$i%u ®D $Hm jmWga 300V43^ sau ® ging 9. trec honh ta;>c ®Xnh ®Kc:

V ] 1 2 (m)IV i*u suÊt tr?n trec $Hm η 1 N7O

V C«ng suÊt tr?n trec $Hm : 1 2=0 (v)

. Dng "3ng "Ec tÝnh cG7 b¬m chB7 ch¸yhi c cha th× ta m5 th?m mTt $Hm ®% h* th+ng gDm 3

$Hm c-ng 6m 9i*cI Jnh 9i tPnh to>n #h!n chän b¬m ch÷a ch¸y : M 1

7NNR (6/s) th× 6u 6Kng 6


10/15

§å ¸n m«n häc C«ng tr×nh thu vµ tr¹m b¬m GVHD: TS. NguyÔn V¨n TÝnbo ® ta chSn chÕ ®T $Hm song song 3 $Hm 6:

00000N7R=

7N7

M

h

22cc ===

∑

JB# $ng:

M M «®

h M2

« 1 ®h @M2

0 0 4 0I000020I00

0 4

200 00 4 0I000020I20

0 4I2

400 200 4 0I000020IN0

0 4IN

=00 300 4 0I00002IN0

0 4=IN

N00 400 4 0I000023I20

0 4NI2

000 00 4 0I00002I00

0 0R3I

74R=I

N7 4 0I000027I2

2I2

200 =00 4 0I000027I20

0 2I2

_8ng ®Æc tPnh mTt +ng trong tr8ng hK# c ch>:

SV: )*' Nh+t ,'nh -1/ 0 /,N -11-


11/15


lSi 6 giao ®i%m cGa ®8ng ®Æc tPnh tng cTng hai ®8ng+ng 9i ®8ng ®Æc tPnh tng $a $Hm trong h* th+ng c-ng 6m9i*c song songI

V M 1 2=4N (6/s)V 1 30R (m)

V AF ging sang trec tung ct ®Æc tPnh mTt $Hm t'i ®i%m ^I Aa c ^ 6 ®i%m 6m 9i*c cGa mTt $Hm khi h* th+ng c $a m>

6m 9i*c song song tr?n hai ®8ng +ngIV M^ 1 42= (6/s)V ^ 1 30R (m)I

V AF ®i%m ^ c M^ 9 ^ nh tr?n ta ®a tr5 9. $i%u ®D $HmjmWga 300V43^ sau ® ging 9. trec honh ta ;>c ®Xnh ®Kc:

V ] 1 (m)IV i*u suÊt tr?n trec $Hm η 1 N7OV C«ng suÊt tr?n trec $Hm : 1 20 (v)

I. !¸c "#nh c7o tr×nh tr6c b¬mI.1 C7o tr×nh tr6c b¬m s'nh ho¹t

h,

"]A]^C]trec +∇=∇

h,) tho mxn ®i.u ki*n: h

$hah,h ]uh

## −−

γ −

γ ≤

Arong ®:V _T ,ù trU ch+ng ;m thùc cho #hf#: ] 1 ] @ 1

2 @ 0 1 7 (m)

]: _T ,ù trU ch+ng ;m thùc ?u c!u 1 2 (m): _T ,ù trU an ton 1 0 (m)V hh: tng tn thÊt thu 6ùc tr?n +ng h


12/15

§å ¸n m«n häc C«ng tr×nh thu vµ tr¹m b¬m GVHD: TS. NguyÔn V¨n TÝnV #a: ># suÊt khP Zu%n 5 ®i.u ki*n 6m 9i*c 1 I04 (kg/m2)V #$h: ># $+c hHi $xo ho cGa chÊt 6ng $Hm 5 nhi*t ®T 6m

9i*cI li sd $Hm 6m 9i*c 5 nhi*t ®T nc 6 2oC thWo $ng 3trang 7 s ta m> $Hm tra ®Kc:

@ ># suÊt $+c hHi $xo ho cGa nc 6 003== ($ar) 1

003==I04

(kg/m2

)@ Ap trSng ri?ng cGa nc 0RR7 (kg/,m3) ≈ 03 (kg/m3)bo 9B ta c:

4R4374NR00

0I03==00I]uh

##

3

44

h$hah

,h =−−−

=−−γ

−γ

≤ (m)

ChSn 3h,h= (m)Iu ra 232h,h"]A]^C]trec =+=+∇=∇ (m)

I.1 C7o tr×nh tr6c b¬m chB7 ch¸yh

,

"]A]

^C]trec +∇=∇h,) tho mxn ®i.u ki*n: h

$hah,h ]uh

## −−

γ −

γ ≤

Arong ®:] 1 ] @ 1 @ 0 1 (m)hh 1 07== (m)

bo 9B ta c:

4737==00

0I03==00I]uh

##

3

44

h$hah

,h =−−−

=−−γ

−γ

≤ (m)

ChSn 3h,h

= (m)Iu ra 232h,h"]A]^C]trec =+=+∇=∇ (m)

]h 9B c+t trec $Hm sinh ho't 9 $Hm chUa ch> $Lng nhau9 $Lng 24 (m)I _i.u n hon ton hK# 6y 9× $Hm sinh ho't 9$Hm chUa ch> sd ,eng c-ng mTt 6o'i 9 chI AhWo tr?nta ®x ni: khi c ch> th× chp c!n m5 th?m mTt $Hm nUa choho't ®Tng ®Dng th8i nghza 6 c>c $Hm n c 9ai trQ tHng ®VHng nhau c tPnh chÊt tHng tù nhauI Yi*c tPnh to>n cao tr×nhtrec $Hm nh tr?n chp 6 ki%m tra thùc chÊt chp c!n tPnh cao

tr×nh trec $Hm cho $Hm sinh ho't rDi 6Ê gi> trX ® cho $HmchUa ch>I

J. Th'Kt b# mL' b¬mbo $Hm sinh ho't 9 $Hm chUa ch> c-ng 6o'i n?n ta s chSn

thiÕt $X mDi chung cho c hai 6o'i 9 tho mxn th8i gian mDi ,i 3#h


13/15


Yh 1 h2hJ

4

bπ 1 4

)70I( 2π 1 773 (m3)

Y$: th% tPch khP ch&a trong thn $Hm 1 40O kh+i $Hm

00

)300430)(I2)(0=0(40

0I0

)300h)(62)(aa(40Y

R222

$ =−+

=−+

=

(m3

)a: ># suÊt khP Zu%n 5 ®i.u ki*n 6m 9i*c 5 ®ktc a 1 0mI

A: th8i gian mDi $Hm A 1 3 #h


14/15

§å ¸n m«n häc C«ng tr×nh thu vµ tr¹m b¬m GVHD: TS. NguyÔn V¨n TÝnMi : Ju 6Kng cGa tr'm $Hm 5 $Bc th& i (m3/s)i : CTt ># cGa tr'm $Hm 5 $Bc th& i (m)

Ai : + gi8 6m 9i*c cGa tr'm 5 $Bc 6m 9i*c th& i (h)η$ η®c: i*u suÊt cGa $Hm 9 ®Tng cHa: li> ®i*n sn ;uÊt 1 200 (®/kvh)

Ar'm 6m 9i*c thWo 2 cÊ# 9i tFng cÊ# ta c: CÊ# ( $Hm 6m 9i*c): A 1 h

M 1 2NOMtr 1 7R0= (m3/h) 1 4R73R (6/s) 1 04R7(m3/s)

1 (m) CÊ# 2 (2 $Hm 6m 9i*c ®Dng th8i):

A2 1 Rh

M2 1 4ROMtr 1 323 (m3/h) 1 NR2 (6/s) 1 024N (m3/s)

2 1 (m) i*u suÊt cGa m> $Hm 9 ®Tng cH:

η$ 1 N7Oη®c 1 R0O

YB tng chi #hP ®i*n nwng:

A_ nwm ∑= ηη

=2

i ,c$

iii3

I02

3=IaI AIIMI0

[ ]

)_Y](=7RI07I32I4

RIINR20II4R73R0R0IN70I02

3=I000I03

=

+=

11. Th'Kt K nhµ tr¹m11.1 Th'Kt K mEt bOng

AhWo tr?n ta ®x tPnh ®Kc s+ $Hm cGa tr'm 6 4 $Hm:@ 2 $Hm sinh ho't@ $Hm chUa ch>@ $Hm ,ù trU cho c hai 6o'i $Hm sinh ho't 9 chUa ch>

^+n $Hm n c-ng thuTc mTt 6o'i V jmWga 300V43^I

V ChSn c>ch $+ trP $Hm thWo ki%u mTt ,x song song 9i trec nhtr'm c>c ®8ng +ng ®Æt trong rxnh ,i sn gian m> n# ®BtÊm ®anIV Yi b1700|00 kPch thc rxnh ®Æt +ng tPnh 6: (&)ng *+,--.-/-. trang 1+0

}Tng: b @ N00 1 700 @ N00 1 00 (mm) 1 (m)Cao: b @ =00 1 700 @ =00 1 300 (mm) 1 3 (m)

Cao tr×nh mÆt ®Êt 6 24m cao tr×nh mùc nc ng!m 6 22mIu ra ®T su mùc nc ng!m so 9i c+t mÆt ®Êt 6 2m | 3mI

]h 9B khong c>ch tF ®> rxnh ®Æt +ng ®Õn c+t mùc nc ng!m6 07m | 0mI bo ® ta kh«ng c!n 6m 6# ch+ng thÊm cho rxnhIV Chi.u rTng cGa nh tr'm: }tr'm 1 2mI

SV: )*' Nh+t ,'nh -1/ 0 /,N -15-


15/15

§å ¸n m«n häc C«ng tr×nh thu vµ tr¹m b¬m GVHD: TS. NguyÔn V¨n TÝnV Chi.u ,i cGa nh tr'm: btr'm 1 2mIV hong c>ch giUa c>c m> $Hm 6Ê $Lng 2mI

1

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CT Thu va TB cap2