bai4_quẠt và hỆ thỐng_r

7/22/2019 Bai4_QUT v H THNG_R

1/51

1

QUT v H THNG(FANS, BLOWERS AND SYSTEMS)

DN NHPCC LOI QUTCC THNG S:

C TNH, HNH HCCHN QUTCC QUI LUT NG DNGVN HNH, LP T

KHO NGHIM QUT TNH TR LC H THNG ( xem gio trnh) TNH TAN CC KCH THC CHNH CA QUT

Nguyn Hng Tm


2/51

2

QUT v H THNG Qut c s dng nhiu

trong sinh hat, cng nghip,nhm cung cp go, tiu th> 15% ingm:

Qut, ng ng+co ni,mt+iu khin, thit b o,thit b u cui (B TN,

HKK..)

Fans: H< 1136mmWG

(t s nn 1.2 )

Nguyn Hng Tm


3/51

3

QUT v H THNG

CC LOI QUT4 LOI CHNH: li tm ( centrifugal), hng trc (axial),hn hp (mixed flow) v ngang dng(cross flow)

Nguyn Hng Tm


4/51

4

QUT v H THNG

QUT LITM: cu to v NLH

Ht vo

Thi ra

Nguyn Hng Tm


5/51

Nguyn Hng Tm 5

QUT LITM: cu to v NLH

Plenum Fan Qut c 2ming ht

FC Fan( Sirocco

)


6/51

Nguyn Hng Tm 6

Cu to rotor: Da sau, cnh, da trc

Da trc c th cn, phng hockhng c ty theo cng dng

Da sau phng hoc khng c

Cnh c hoc khng c gn tngcng ( bn)

Da sau

Cnh

Da Cn trc

Gn tng bn

Gn tng bn


7/51

Nguyn Hng Tm 7

QUT v H THNG

CC DNG CNH:

Dng kh(AF)

Nghing lui (BI),Cong ti (FC)

Hng tm (RB)

u cnh hng tm (RT)

2 ming ht


8/51

Nguyn Hng Tm 8


9/51

Nguyn Hng Tm 9

Qut li tm nhiu tng cnh

V ngoi dng tr trn

Qut li tm 1 tng cnh c

v ngoi dng xon c


10/51

10

QUT v H THNG

CC DNG CNH:phm vi s dngCnh AF: c hiu sut () cao nht, t n, dng trong

thng thang,HKK, TN.

Cnh BI: d ch to hn AF, dng trong HVAC, kh ctnh mi mn

Cnh FC: t n nht, Q ln, thp

Cnh RB: trung bnh, vn chuyn vt liuCnh RT: c cao hn RB

Nguyn Hng Tm


11/51

11

QUT v H THNG

QUT HNG TRC: cu to v NLH

C 3 dng Qut chong chng,(propeller, panel)

Qut trc ng (tube axial, TAF)

Qut trc c hng dng (van axial, VAF)

Nguyn Hng Tm


12/51

12

QUT v H THNG

QUT HNG TRC: 2 tng cnh,

nhm tng H, c 2 dng:

2 stage VAF 2 stage TAF

Nguyn Hng Tm


13/51

13Nguyn Hng Tm


14/51

14

ng c tnh ca qut HT

ng c tnh cacc lai qut HT ccng ng knh rotov s vng quay n

Nguyn Hng Tm


15/51

15

QUT v H THNG

QUT mixed flow = axial +centrifugalDng 1

Dng 2

Nguyn Hng Tm


16/51

16

QUT mixedflow = axial +centrifugal= inline centrifugal

Nguyn Hng Tm


17/51

17

QUT v H THNG

QUT crossflow

Nguyn Hng Tm


18/51


19/51

19

CC THNG S KCH THC QUT HT

ng knh rotor, Dro, ng knh trng, Dtr, Dh ng knh v, Dv Gc t cnh 1 2

Khe h u cnh < 1,5% chiu di cnh Cnh nn dng Chiu di ng vo

L1> 0,2Dtr

Chiu di v L2 > 0,7Dtr Bn knh loe r S cnh z, dng cnh kh

ng, hay cong phng

Nguyn Hng Tm


20/51

20

nh hng ca cc thng s hnh hc

T s Dh/Dr n H

S cnh v B rng cnh n n v

Khe h u cnh n , n, H

Nguyn Hng Tm


21/51

21

nh hng ca gc t cnh

Gc t cnh nh hng n Q, H

Nguyn Hng Tm


22/51

22

CC THNG S KCH THC QUT LT ng knh roto D2, ng knh ming ht D1, b rng

roto B1, B2; b rng v B; gc t cnh 1, 2; C vngai trn, hoc xon vi cc bn knh to v R1, 2, 3, 4hoc khng c v

S cnh z, dng cnh kh ng, cong phng

Nguyn Hng Tm


23/51

23

CC QUI LUT NG DNG

ng dng lu lng

ng dng ct p

ng dng cng sut

ng dng nN2 - N1=50 log10(D2/D1) + 50 log10(n2/n1)

Vi ch s 1 l ca qut bit, 2 l ca qut mun bit

3

1

2

1

2

1

2

=

D

D

n

n

Q

Q

2

1

2

2

1

2

1

2

=

D

D

n

n

p

p

5

1

2

3

1

2

1

2

=

D

D

n

n

P

P

Nguyn Hng Tm


24/51

24

NG C TNH QUTH THNG

th m t quanh ca Q vi H,P,

im BEP im FOP

l giao im cang c tnh qutvi h thng

Nguyn Hng Tm


25/51

Nguyn Hng Tm 25

NG C TNH QUT

th m t quan h ca Q vi H,P,

10

12

14

16

18

20

22

24

26

20

30

40

50

60

70

80

90

100

7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

Tnhap,mmH2O,

Hieusuat,oon

Lu lng, m3/s

NG AC TNH QUATQuat 150HT-0.50-32-2010, n=782 v/ph

mmH2O

Tinh,%

Co, %

dB(A)_T

kWatt


26/51

26

KHO NGHIM QUT

Nhm xc nh ng c tnh qut PHNG PHP vt cn : (Orific, Ventury, Nozzle)

PHNG PHP dng ng pitot (H ng kho nghim):(JIS B 8330, ANSI/AMCA 210-99)

Nguyn Hng Tm


27/51

Nguyn Hng Tm 27

Dng c o p: ng pitot, p k

Phng php l ( orific)

p k nghing ( inclined manometer)

ng pitot


28/51

Nguyn Hng Tm 28

c thm

Gio trnh Bm qut my nn, Nguyn Hng tm, 2007; v

Phng php kho nghim qut theo JIS B 8330

Phng php ng kho nghim

Khi


29/51

29

ng pitot tiu chun

Nguyn Hng Tm


30/51

30

V tr o vn tc gi trong ng trn, ch nht

Nguyn Hng Tm


31/51


32/51


33/51

33

TR LC H THNG

TR LC NG NG TR LC CC B

TR LC CA THIT B U CUI.

c ti liu: NGUYN HNG TM , 2007, Gio trnh Bm Qut My nn ng

dng

ASHRAE handbook, 2004. Systems and Equipment. Chng16,18 .ASHRAE handbook, 2001. Fundamental. Chng,12,32,34,35.

Le Ch Hiep. 2001. Ky thuat ieu hoa khong kh: Chng 10:Thiet ke ong dan khong kh, trang 325- 416. Nxb Khoa hoc Kythuat, Ha noi.

Nguyn Hng Tm


34/51

34

TNH TAN

Nhm tnh ton cc thng s chnh caqut: hng trc, li tm c NGUYN HNGTM , 2007, file Xls, Gio trnh Bm Qut My nn ngdng

v cc bng tnh Excels. Lm cc bi tp lin quan, v Lm cc kho nghim qut Lu : vic tnh tan thit k qut cn kt hp

l thuyt v thc nghim, kinh nghim, nhtl i vi qut li tm v c nhiu s chn la chomt yu cu c th

Nguyn Hng Tm


35/51

35

MT VI LU KHI LP T QUT-TK

c th: treo 1 bn, 2 bn, hoc t 1 bn,

Khng hoc c ming ht chuyn hng, 1 hay 2 ming ht..

Nguyn Hng Tm


36/51

36Nguyn Hng Tm


37/51

37

Lp t qutng ng htLp ng ng ht

Lp sai

Nguyn Hng Tm


38/51

38

Lp t qutng ng y

Lp ng ng y ng

Lp sai

Cn chn qut hp l din tch ming thi v din tch ng ng gn bng nhau!

Nguyn Hng Tm


39/51

Nguyn Hng Tm 39

Lp trn sng

Lp di trn nh


40/51

Nguyn Hng Tm 40

Kim tra

b truyn ai


41/51

41

LP QUT HT

CHA NG NG

Mt pha trc cnh gy ri v n

cn u vo ln gy ri v tn tht

Nguyn Hng Tm


42/51

42Nguyn Hng Tm


43/51

Nguyn Hng Tm 43

Qut HT lp trn sng nh


44/51

Nguyn Hng Tm 44

Qut HT lp di trn


45/51

Nguyn Hng Tm 45

Qut + Moto lp ngoi, lp trn sng


46/51

Nguyn Hng Tm 46

Qut + Moto lp ngoi,lp di trn


47/51

Nguyn Hng Tm 47

Cn trao i thm xin lin h:

GVC. Nguyn Hng Tm

[email protected]

D 0913 900 676

Mt s hnh nh v qut c nghin cu TK ch toKN v lp t
mailto:[email protected]:[email protected]


48/51

48Nguyn Hng Tm


49/51

49Nguyn Hng Tm


50/51

Nguyn Hng Tm 50


51/51

Nguyn Hng Tm 51

NOW

WHAT ???Why ???

bai4_quẠt và hỆ thỐng_r

Documents