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Moisture Measurement BV Challenges in determination the Moisturecontent of woody biomass 1 Slide 2 Moisture Measurement BV 2 Who is INADCO Developer and producer of measuring-equipment for measuring the physical properties of Bulkmedia like woodchips, straw, miscanthus. - Bulkdensity - Mass - Volume - Moisturecontent Slide 3 Moisture Measurement BV 3 Measuring during process Moisture = ???? % Slide 4 Moisture Measurement BV 4 Most known methods of measuring moisture Drying StoveMicrowave CapacitiveNear Infra Red Slide 5 Moisture Measurement BV 5 Inline Sensoren Benefits: - Contactless - Fast - More properties Disadvantages: - Measures only surfaces - Sensitive for environments - Expensive MicrowaveCapacitive Benefits: - Simple - Easy to handle - Low cost Benefits: - Simple - Easy to integrate - Reasonable price Disadvantages: - Inaccurate - Not usable in product with a lot of air inclusions - Not usable in product with hard particles Disadvantages: -Small surface - Not usable in product with a lot of air inclusions - Not usable in product with changing bulkdensty Price range: 500,00 - 1.000,00 Price range: 3.500,00 - 6.500,00 Price range: 12.000,00 - 30.000,00 Near Infra Red Slide 6 Moisture Measurement BV Quality of measurement with different technologies 6 Slide 7 Moisture Measurement BV 7 Influence of Bulkdensity with High Frequency methods sensor Higher compression = more moisture particles per volume Slide 8 Moisture Measurement BV Reliability of the measurement Weight 50.11 kg Weight 49.88 kg Why? * The real weight of this person is 75 kg How accurate is this scale? Is this a reliable weighing scale? * 0.23 kg ? * NO !!! Conclusion Two digits behind the decimal point does not always mean that the value is true 8 Slide 9 Moisture Measurement BV Reference measurement. With the drying stove? Moisturecontent ??? Result: Moisturecontent = 45% Drying at 103 C for 24h (EN14774-1:2009) Could be! 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