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Viscosity Model Uncertainties in an Ash Stabilization Batch Mixing Process

Svantesson, T.; Lauber, A. and Olsson, Gustaf LU (2000) IEEE Instrumentation and Measurement Technology Conference IMTC/2000 In Instrumentation and Measurement Technology Conference, 2000. IMTC 2000. Proceedings of the 17th IEEE 2. p.909-914
Abstract
Recycling wood ash from burnt wood (back to the forest grounds) is of great ecological importance. However, the ash cannot be recycled directly after combustion. There are several reasons for this, one being the volatility of wood ashes. Mixing ash/dolomite/water in order to obtain granular material is one method to stabilize wood ashes. The main problem is predicting the quantity of water to be added, since the necessary amount varies with the wood ash quality. One possible solution is to measure the mixture viscosity and study whether this parameter can be used to control the amount of added water. In this paper, the viscosity is estimated in the batch mixing process by measuring the normalized effective power Pe(t), that represents the... (More)
Recycling wood ash from burnt wood (back to the forest grounds) is of great ecological importance. However, the ash cannot be recycled directly after combustion. There are several reasons for this, one being the volatility of wood ashes. Mixing ash/dolomite/water in order to obtain granular material is one method to stabilize wood ashes. The main problem is predicting the quantity of water to be added, since the necessary amount varies with the wood ash quality. One possible solution is to measure the mixture viscosity and study whether this parameter can be used to control the amount of added water. In this paper, the viscosity is estimated in the batch mixing process by measuring the normalized effective power Pe(t), that represents the rate of useful work being performed by the three-phase asynchronous machine used for the stirrer drive. The coherence function is used in order to detect any nonlinear relationship between the input-output data-the variable water flow and the normalized effective power Pe(t). It is shown that measuring Pe(t) is extraordinary well suited for future control of the amount of added water. First and second stage experiments are carried through in order to obtain a model of the viscosity dynamics (Less)
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published
subject
keywords
autoregressive processes batch processing (industrial) bioenergy conversion covariance matrices matrix decomposition mixing modelling process control recursive estimation recycling uncertain systems viscosity wood processing
in
Instrumentation and Measurement Technology Conference, 2000. IMTC 2000. Proceedings of the 17th IEEE
volume
2
pages
909 - 914
conference name
IEEE Instrumentation and Measurement Technology Conference IMTC/2000
external identifiers
  • Scopus:0033717064
ISBN
0-7803-5890-2
DOI
10.1109/IMTC.2000.848863
language
English
LU publication?
yes
id
2ca639bd-a964-4a81-8677-f293ed6f91fe (old id 4358649)
date added to LUP
2014-03-18 09:18:04
date last changed
2016-10-13 04:58:29
@misc{2ca639bd-a964-4a81-8677-f293ed6f91fe,
  abstract     = {Recycling wood ash from burnt wood (back to the forest grounds) is of great ecological importance. However, the ash cannot be recycled directly after combustion. There are several reasons for this, one being the volatility of wood ashes. Mixing ash/dolomite/water in order to obtain granular material is one method to stabilize wood ashes. The main problem is predicting the quantity of water to be added, since the necessary amount varies with the wood ash quality. One possible solution is to measure the mixture viscosity and study whether this parameter can be used to control the amount of added water. In this paper, the viscosity is estimated in the batch mixing process by measuring the normalized effective power Pe(t), that represents the rate of useful work being performed by the three-phase asynchronous machine used for the stirrer drive. The coherence function is used in order to detect any nonlinear relationship between the input-output data-the variable water flow and the normalized effective power Pe(t). It is shown that measuring Pe(t) is extraordinary well suited for future control of the amount of added water. First and second stage experiments are carried through in order to obtain a model of the viscosity dynamics},
  author       = {Svantesson, T. and Lauber, A. and Olsson, Gustaf},
  isbn         = {0-7803-5890-2},
  keyword      = {autoregressive processes batch processing (industrial) bioenergy conversion covariance matrices matrix decomposition mixing modelling process control recursive estimation recycling uncertain systems viscosity wood processing},
  language     = {eng},
  pages        = {909--914},
  series       = {Instrumentation and Measurement Technology Conference, 2000. IMTC 2000. Proceedings of the 17th IEEE},
  title        = {Viscosity Model Uncertainties in an Ash Stabilization Batch Mixing Process},
  url          = {http://dx.doi.org/10.1109/IMTC.2000.848863},
  volume       = {2},
  year         = {2000},
}