sensor temp flow
TRANSCRIPT
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Temperature and Flow
( )
1/16
1.
1.1 (Bimetal)
1. 2. 3. 4.
Invar 36% 64% (Spiral) (Helix) 1
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Temperature and Flow
( )
2/16
()
()
1. Sheath Fluid -180 C 550 C 1/2% 2%
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Temperature and Flow
( )
3/16
1.2 1.0% 100 F 3,250 F 1.2.1 (Crayons) 100 F 2,500 F 2
2. Crayons 1.2.2 (Lacquer) Crayons Lacquer Lacquer 150 F 2,500 F 10 3
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Temperature and Flow
( )
4/16
3. Lacquer 1.2.3 (Pellet)
Monitor Heat Zone (Furnace) 7/16 1/8 100F 3,250F Reducing Pellet 4
4. Pellet 1.2.4 (Labels)
4 10F 25F 100F 400F
(Overheat) (Hot Spot) (Bearing)
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Temperature and Flow
( )
5/16
Labels 5
5. Labels 1.3 Fusion Cone Fusion Cone (Ceramic) .. 1880 Seger Seger Cone Fusion Cone 6 2 Cone Cone Cone 600C 2,000C
6. Fusion Cone
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Temperature and Flow
( )
6/16
1.4 (Positive Temperature - Frequency Coefficient) Linearity 0.05% - 400F 500F Resolution 0.00018F (Y) (Accuracy) (Repeatability) (Self Heating) RTD (Laboratory) 1,000 F
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Temperature and Flow
( )
7/16
2. 2.1 Elbow (Elbows Taps) Elbow (Differential) 7
() ()
7. Elbows Taps
() Taps 45
() Taps 22.5
5 10% Pressure Head
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Temperature and Flow
( )
8/16
Elbow 1. Elbow 2.
3. 25 10 P
2.2 Pitot Tube 8 Static
8. Pitot Tube
9 Pitot Tube 50 30%
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Temperature and Flow
( )
9/16
Reynolds Number 9 Pitot Tube Velocity Profile 1/2 5%
9.
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Temperature and Flow
( )
10/16
2.3 Annubar Pitot Tube (Mean Velocity Head) 4 10
10. Annubar 10 4 Annubar (1)
PkQ = (1)
Annubar 11
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Temperature and Flow
( )
11/16
11 () 1 121 Static
Annubar 11 () Annubar 50 175 mm 11 () 150 1,800 mm 11 () ()
()
()
()
()
11. Annubar 2.4 Target Target Flow meter Target 12 Target Target Flow Rate Bernoulli (2)
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Temperature and Flow
( )
12/16
12. Target
Target
=
gVAkF t 2
2 (2)
F Target V At Target k (Proportionality Constant) g Target Flow meter Orifice Orifice Target Accuracy 0.5% 0.5 60 Target () 0.4 0.8 Target 1.5 20 2.5 (Vortex) Flow meter Shedding Element T (Vertex) Shedding Element Swirlmeter (Piezoelectric
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Temperature and Flow
( )
13/16
Crystal) Vertex Flow meter 12 Shedding Element Pulse
12. Vertex Flow meter (3)
Vf
min 10= (3)
Vf (ft/s) f (lb/ft3)
(4)
Vf
max 158= (4)
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Temperature and Flow
( )
14/16
2.6 Swirlmeter Swirlmeter Flow meter (Vertex) 3 (Swirl Producing Component) Pulse (Deswirl Component) 13
13. Swirlmeter
Swirlmeter 1. Accuracy 1% 2. Repeatability 0.25% Full Scale 3. Reynolds Number Fluid 10,000 100,000 4. Rangeability 30:1 5. 500 F 6. 300 Psig 7. Flow meter
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Temperature and Flow
( )
15/16
10 2.7 2 Counterpropagating Doppler Counterpropagating Doppler 2.7.1 Counterpropagating 14
() ()
() ()
14. Counter propagating () () () ()
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Temperature and Flow
( )
16/16
2.7.2 Doppler 15
15. Doppler
0.5 1 MHz (Q) (5)
=HZ
Sin42
ff
V DQ SO
(5)
f fHz VSO