Transcript Vochtmeten in inhomogene stortgoederen

Moisture Measurement BV
Challenges in determination the
Moisturecontent of woody biomass
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Moisture Measurement BV
Who is INADCO
Developer and producer of measuring-equipment for
measuring the physical properties of Bulkmedia like
woodchips, straw, miscanthus.
- Bulkdensity
- Mass
- Volume
- Moisturecontent
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Moisture Measurement BV
Measuring during process
Moisture = ???? %
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Moisture Measurement BV
Most known methods of measuring moisture
Capacitive
Near Infra Red
Microwave
Drying Stove
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Moisture Measurement BV
Inline Sensoren
Capacitive
Microwave
Near Infra Red
Benefits:
Benefits:
Benefits:
- Simple
- Easy to handle
- Low cost
- Simple
- Easy to integrate
- Reasonable price
- Contactless
- Fast
- More properties
Disadvantages:
Disadvantages:
Disadvantages:
- Inaccurate
- Not usable in product with a lot
of air inclusions
- Not usable in product with hard
particles
-Small surface
- Not usable in product with
a lot of air inclusions
- Not usable in product with
changing bulkdensìty
- Measures only surfaces
- Sensitive for environments
- Expensive
Price range:
Price range:
Price range:
€ 500,00 - € 1.000,00
€ 3.500,00 - € 6.500,00
€ 12.000,00 - € 30.000,00
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Moisture Measurement BV
Quality of measurement with different technologies
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Moisture Measurement BV
Influence of Bulkdensity with High Frequency methods
Higher compression = more moisture particles per volume
sensor
sensor
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Moisture Measurement BV
Reliability of the measurement
How accurate is this scale?
* 0.23 kg ?
Is this a reliable weighing scale?
* NO !!!
Why?
* The real weight of
this person is 75 kg
Weight
Weight
50.11 kg
49.88 kg
Conclusion
Two digits behind the decimal
point does not always mean that
the value is true
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Moisture Measurement BV
Reference measurement. With the drying stove?
Result: Moisturecontent = 45%
Could be!
Moisturecontent
???
Drying at 103 °C for 24h
(EN14774-1:2009)
The wooden block was pretreated
1 day in a drum of petrol
Conclusion
There are more extractables in
wood than just water which will
vaporize at 103 °C like oils and
resins. The real amount of water
is thus <45%.
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Moisture Measurement BV
Reliability of the measurement
STEM
BRANCH
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Moisture Measurement BV
Evaporation of water and …..
3 days drying at 60 °C
Moisture [%]
Temperature at 110 °C
+ 2.2%
Temperature [°C]
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Moisture Measurement BV
Sample deviation against average from Dryingstove
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Moisture Measurement BV
The INADCO Method
The measuring electrode in the wall
of the measuring cylinder measure a
large thick shell of product on the
inner side of the cylinder
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Moisture Measurement BV
The INADCO Method in action
This video can be seen at: www.inadco.nl/taal/nederlands/video.htm
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Moisture Measurement BV
Other measuring-layouts
Measuring in a funnel
Measuring through a belt
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Moisture Measurement BV
Validation
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Moisture Measurement BV
Thank you for your interest and attention.
For more questions or comments you can
visit us at booth I-2.
INADCO
Meerheide 18
5521 DZ Eersel The Netherlands
Phone: +31 (0) 497-517291
Fax: +31 (0) 497-517469
E-mail: [email protected]
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Web: www.inadco.nl