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TRANSCRIPT
08/27/2014
Products Solutions Services
Got Steam?
New Techniques for Measuring Steam Quality in Utilities
Slide 1 Adam Battinieri
08/27/2014
Got Steam? New Techniques for Measuring Steam Quality in Utilities
How does steam safety impact you?
Adam BattinieriSlide 2
08/27/2014
Got Steam? New Techniques for Measuring Steam Quality in Utilities
What we don’t measure- we can’t control
Adam BattinieriSlide 3
What is Wet Steam?
Do you know the quality of your Steam?
100% steam quality
80% steam quality
08/27/2014
Got Steam? New Techniques for Measuring Steam Quality in Utilities
How do you measure steam quality?
Adam BattinieriSlide 4
3 Components:• Pressure
• Temperature
• Amount of liquid (condensate)
08/27/2014
Got Steam? New Techniques for Measuring Steam Quality in Utilities
Where am I on the steam curve?
Adam BattinieriSlide 5
08/27/2014
Got Steam? New Techniques for Measuring Steam Quality in Utilities
What is Dryness Fraction
Adam BattinieriSlide 6
• Mass Fraction vs. Volume Fraction – Quality is the % mass that is vapor
• Quality = 1 Saturated Vapor
• Quality = 0 Saturated Liquid
08/27/2014
Got Steam? New Techniques for Measuring Steam Quality in Utilities
Application Example – Why dryness fraction is a mass term
Adam BattinieriSlide 7
Low Pressure Steam: Steam Quality 90%• In volume terms: 99.9% of the volume is Vapor
Low Pressure Steam: Steam Quality 10%• In volume terms: 98.9% of the Volume is Vapor
Conclusion: 90% steam quality to 10% steam quality has a volume difference of 1% resulting in a 340% difference in Energy
08/27/2014
Got Steam? New Techniques for Measuring Steam Quality in Utilities
Dangers of Wet Steam
Adam BattinieriSlide 8
• Water Hammer
• Erode control valves
• Premature failure of steam system
08/27/2014
Impact: Supplying values you need
NEW direct 4-20mA input allows temperature and pressure
correction with an output format a customer desires
Got Steam? New Techniques for Measuring Steam Quality in Utilities
Adam BattinieriSlide 9
Direct Mass and Energy
08/27/2014
Got Steam? New Techniques for Measuring Steam Quality in Utilities
Impact: Poor steam quality - expanded
Adam BattinieriSlide 10
Dryness fraction
08/27/2014
Got Steam? New Techniques for Measuring Steam Quality in Utilities
Value: Steam quality energy correction
Adam BattinieriSlide 11
08/27/2014
Got Steam? New Techniques for Measuring Steam Quality in Utilities
Prowirl 200 is optimized for steam measurement
Slide 12
IAPWS - table
• Mass and energycompensation for wet/saturated and superheated steam
• Compensation with temperature and pressure (fixed or dynam
The International Association for the Properties of Water and Steam
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Causes of Wet Steam
Got Steam? New Techniques for Measuring Steam Quality in Utilities
Adam BattinieriSlide 13
08/27/2014
Application example: How improving steam quality impacts the bottom line
Improving your steam quality from 0.8 to 0.95 on a 13000 lb/hr Boiler
How Much Money does improving my Steam quality from 0.8 to 0.95 save?
95k/year
Got Steam? New Techniques for Measuring Steam Quality in Utilities
Adam BattinieriSlide 14
95% steam quality
80% steam quality
95% steam quality
08/27/2014
Application Example: Measuring in Mass vs. Energy
• How much are you being over charged if the steam you are receiving is 0.9 dryness fraction?
• Utility bill will be 8%higher than it should be
Got Steam? New Techniques for Measuring Steam Quality in Utilities
Adam BattinieriSlide 15
08/27/2014
Got Steam? New Techniques for Measuring Steam Quality in Utilities
What have we learned?
Boilerhouse, Marstons Brewery, UK
“Your meter is wrong!!”
Slide 16 Adam Battinieri
08/27/2014
Brewery Flow Measurement
Got Steam? New Techniques for Measuring Steam Quality in Utilities
8017FT
8017
FT8023
FT8023
FuelFuel
FT03
FT01
FT8022FT
8022
Blo
w d
own
FT02
Air
Air
Feed water tank
FT8016FT
8016
FT8023Saturated Steam
P = 8.5 bara / 123psiT = 173°C / 343°F
Q_m = 4.6t/hDN 100
FT8017Saturated Steam
T = 155°C / 311°FQ = 2.4t/h
DN 80
FT8022Saturated Steam
T = 155°C / 311°FQ = 2.4t/h
DN 80
FT8016Saturated Steam
No insulationT = 173°C / 343°F
Q = 1.55t/hDN 80
L = 300 mQ_loss = 182kW
Q_m_cond. = 0.32t/h
FT 01Combustion AirP = 1bara / 15psiT = 20°C / 68°FQ = 13.650t/h
DN 250V = 61.8m/s
FT 02Fuel Oil (Middle)P = 2bara / 29psiT = 25°C / 77°F
Q = 0.785t/hDN 8
V = 4.3m/s= 913.31kg/m³ = 121.8cP
FT 03Feed Water
DN 40V = 2.6m/s
Slide 17 Adam Battinieri
08/27/2014
Your flowmeter is wrong!
Got Steam? New Techniques for Measuring Steam Quality in Utilities
Comparison of boiler outlet and sub-meters:
FT8023 (Boiler outlet): 4.6t/hSum of FT8017, FT8022 and FT8016: 2.4t/h + 2.4t/h + 1.55t/h = 6.35 t/h
Deviation of 38%
Reason: Prowirl 73
Slide 18 Adam Battinieri
08/27/2014
Got Steam? New Techniques for Measuring Steam Quality in Utilities
What is your boiler operation & efficiency plan?
Adam BattinieriSlide 19