Dual Fluidised Bed System - Revision history

137.215.6.50 at 08:54, 29 November 2011

2011-11-29T08:54:26Z

137.215.6.50 at 08:54, 29 November 2011

2011-11-29T08:54:12Z

137.215.6.50 at 07:59, 29 November 2011

2011-11-29T07:59:05Z

137.215.6.50: Created page for DFB rig

2011-11-29T07:58:49Z

Created page for DFB rig

New page

[[File:Pmc04flow_rig.JPG|400px|right|thumb|The level and flow control rig]]
== Introduction ==
This rig, still under construction at time of writing, will be a dual fluidised bed system which converts woody biomass into bio-oils. The pyrolysis bed contains the endothermic reaction which converts the biomass, while the energy required for the reaction is supplied by a combustion bed which burns off solid byproducts of the pyrolysis reaction.

== Previous Projects ==

This section describes some of the previous projects that was done on the level and flow rig to give you an idea of what has been done and where you can find the results obtained. Most important data contained in this section is information about what models were used/developed (if you want to reuse models) and what control strategies were employed (if you want to compare your results to something specific).

=== Mark Transell, 2011 ===
'''Controllability Analysis:''' A full feedback controllability analysis was performed, which gave promising results for the initial design. It appears that the desired operating region is fully contained within the operating envelope, and disturbances can be rejected without saturating the manipulated variables.

'''Design modification suggestions:''' Two system modifications were suggested: <br />
* The inclusion of an inert gas line to the pyrolysis bed distributor to aid in startup <br />
* Cascading of control loops from temperature to flow controllers <br />

'''Other notes:''' The system, when constructed, is intended to use the controller tunings outlined in Transell (2011)

← Older revision		Revision as of 08:54, 29 November 2011
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	* Cascading of control loops from temperature to flow controllers <br />		* Cascading of control loops from temperature to flow controllers <br />

−	'''Other notes:''' The system, when constructed, is intended to use the controller tunings outlined in [http://ragnarok.up.ac.za/Rigs/08_DualFluidisedBed/2011/Project%20Report.pdf/ Transell (2011)]	+	'''Other notes:''' The system, when constructed, is intended to use the controller tunings outlined in [http://ragnarok.up.ac.za/Rigs/08_DualFluidisedBed/2011/Project%20Report.pdf Transell (2011)]

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 == Introduction ==
 This rig, still under construction at time of writing, will be a dual fluidised bed system which converts woody biomass into bio-oils. The pyrolysis bed contains the endothermic reaction which converts the biomass, while the energy required for the reaction is supplied by a combustion bed which burns off solid byproducts of the pyrolysis reaction.
@@ Line 14: / Line 13: @@
 * Cascading of control loops from temperature to flow controllers <br />
-'''Other notes:''' The system, when constructed, is intended to use the controller tunings outlined in Transell (2011)
+'''Other notes:''' The system, when constructed, is intended to use the controller tunings outlined in [http://ragnarok.up.ac.za/Rigs/08_DualFluidisedBed/2011/Project%20Report.pdf/ Transell (2011)]