ARI Short Agriculture Seminar

8/12/2019 ARI Short Agriculture Seminar

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AIR VALVES - TheAIR VALVES - TheEfficientEfficientFlow ControllersFlow Controllers

In AgricultureIn Agriculture


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1. Introduction to Air/Wter.

!. "ow Air gets into #i#elines.

$. %isd&ntges of Air#resence in #i#elines.

'. %isd&ntges of Air (sence in #i#elines.). *eh&ior of Air in #i#es.

+. The #ur#ose of Air Vl&es.

,. The (sic o#ertion of n Air Vl&e.. The three (sic t#es of Air Vl&es

1


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. "ow the different t#es of Air Vl&es wor0.

1. Choosing nd locting Air Vl&es in Agriculture

11. A.R.I.2s Air Vl&es.

1!. A.R.I. 3ln 1.1Air Vl&e Si4ing nd Loction3rogr5.

1$. Conclusions nd %iscussions.

2


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VISCOSITY

Pressures along a horizontal tube in which flows

(a) an ideal fluid (b) a !iscous fluid

(a)

(b)


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oC Castor Oil "ater #ir

Centi$oise Centi$oise Centi$oise

0 5,300 1.792 0.00171

20 986 1.005 0.00181

40 231 0.656 0.0019

60 80 0.469 0.002

80 30 0.357 0.00209100 17 0.284 0.00218


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Air nd 67gen Solu(ilit in Wter

0

0.5

1

1.5

2

2.5

3

3.5

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

Te5#erture 8deg. Cent.9

Volu5etricco

ncentrtion

83ercent9

Air Concentration Oxygen Concentration

airhmhm %&'1&&&%21*++


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1 Vacuu, enhanced $roble,s andda,ages-

a Suction of ,ud and dirt through

dri$$ers and tric.lers

b Suction of seals and gas.ets in/line

dri$$ers and tric.lers and otherinternal accessories of $i$es into the

$i$elines

c 0ncontrolled suction of inected

che,icals or fertilizers into the

sste,2 Pi$e or accessor colla$se do to sub3

at,os$heric (negati!e) $ressures

+ In so,e cases the absence of an air

cushion can increase the da,ages of surge

and sla, $heno,ena


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engbehaviour


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Critical Velocit 4e5uired for Trans$orting #ir 6ubbles (,etric)

2"

3"

4"

6"

8"

10"

12''

14"

16"

18"

20"22"

24"

28"

&7

&'

12

1*

2&

27

2'

&&(&

1&(1 1 1

&

8own 3 Slo$e of Pi$e (,%,)

CriticalVelocit2(,%s)


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ENGLOCATION


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CRITICAL VELOCITYCRITICAL VELOCITY

FOR THE TRANSPORT OF AIR BUBBLESFOR THE TRANSPORT OF AIR BUBBLES


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9u,ber of 6ara. 83&7& #ir Val!es 9eeded :or Pi$e :illing#s 8eter,ined b :ill Velocit

( #t &* bar('* $si) deferential $ressure)

0

0.5

1

1.5

2

2.5

3

3.5

0 1 2 3

9u,ber of 6ara.s 4e5uired

:illVelocit2,%sec

12 inch1& inch' inch* inch7 inch2 inch


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9u,ber of 6ara. 83&7& #ir Val!es 9eeded :or Vacuu, Protection

#s 8eter,ined b Pi$e dia,eter and Slo$e(at &7 bar (' $si) differential sub3at,os$heric $ressure)

0

5

10

15

20

25

30

35

40

45

50

0 1 2 3 4 5

9u,ber of Val!es 4e5uired

Slo$eofPi$ein;

12 inch

1& inch

' inch

* inch7 inch2 inch


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Nu!er o #uar$ean% &euire$ or (acuu )rotectionaccor$ing to !ur%t ana*y%i% at 5.8 +%i negatie +re%%ure

2" 4"6"

8"

10"

12"

0

10

20

30

40

50

0 1 2 3 4 5

Nu!er o" #uar$ean% &e'uire$

-*o+e

o")i+e

in

+ercen

t


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Nu!er o" #uar$ean% &e'uire$ "or (acuu )rotection accor$ing to !ur%t ana*y%i% at 5.8 +%i negatie +re% %ure

0

50

100

150

200

250

300

350

400

0 1 2 3 4 5

Nu!er o #uar$ean% &euire$

-*o+e

o")i+e

in

)erce

nt

2" 4" 6" 8" 10" 12"


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ENGBUTH


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#4I S?#=CONCET T!A"ITIONAL

ENGNE#CONCET


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Orifice 8ia,eter @ 1 s5 ,, Orifice 8ia,eter @ 12 s5 ,,


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1c,

Ac,

#4I Sege!

Classic S,all Orifice #ir Val!e


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9ew9ew6ara.6ara.

11BB


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Su$$l ead with 6ara.sSu$$l ead with 6ara.s


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Su$$l ead with 6ara.sSu$$l ead with 6ara.s


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:I=T4#TIO9

SYST?DS

4?V?4S?

OSDOSISENGIC2


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#4I #ir#4I #ir

Val!es onVal!es on

:ilter:iltereads ineads in

ondurasonduras


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I84O

?=?CT4IC

PO"?4

ST#TIO9

:O48 DOTO4S

"#T?4

T4?#TD?9T3

D?EICO

ENG

IC4


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IrrigationIrrigation

#ir Val!e#ir Val!e

Setu$sSetu$s


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IrrigationIrrigation

#ir Val!e#ir Val!e

Setu$sSetu$s


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1


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SECCION GASTO(lps)TIEMPO(h:m)

I

II

III

IV

V

VI

VII

VIII

AREA (ha)

27.7 61.8 5 hrs ! m"#

$

I$

TOTA%

25.&

27.

56.5

61.!

5hrs!m"#

5hrs!m"#

721.2281'&2'8& 22hrs1!m"#

81'&2'8&ha81'&2'8&ha

Papaa&.!

Ca#alElr*+r",-,r-,r"pII

&.6 lph

1.5 M.5 M218! lps

Trs

6!!.8 mm/h-ra

''''''

.5 mm/,"a5.6 h-ras

0"ar"-

Trs5.6 h-ras

61lps

6.! /3m2

Mallasa+4-m4"3- 2A8!6I#34-r V#4+r"&8mm

17h-rasapr-

1!.!m3a

1.! m3a

1.! m3a15.8m3a

5.! m3a

19.!m3a

57m.3.a.

S"m:-l-25a

T+- s3+#,ar"-

"l4ra3"# s3+#,ar"a

0"r33"# ,la ra#4

Nmr-, s33"#+#4 , a as43"m"#4-

Vl;+la , s33"-#am"#4-

Cr+3r-

C+r;a , #";l

Vl;+la ,al";"-Vl;+la ,a"r

T+ra


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Documents

ARI Short Agriculture Seminar