Expert meeting on high percentage biomass cofiring in new power plants
An upcoming issue driven by the difference in fuel price of is the desire to burn uncommon and challenging fuels with low ash melting temperatures and high N and Cl content, such as (pellets from) agrifuels such as straw and press cake, reed canary grass, RDF, chicken litter, etc.
The combustion technology needs to be properly designed or adapted to be able to deal with these fuels, as it may lead to excessive corrosion in boiler tubes, excessive slagging and fouling as well as much higher emission of NOx and (fine) particles.
At the same time, it can be observed that the superheater steam temperature (and thereby electric efficiency) of biomass power plants for challenging fuels has over the years increased significantly, for example there are power plants based on straw that generated steam of 540°C. This mainly depends mainly on the biomass composition, the boiler configuration and the boiler materials used.
At the European Bioenergy Conference in Lyon (May 2010), Task 32 will organise an expert workshop on 'Combustion of Challenging Biomass Fuels'. The workshop will present:
- The resource basis of alternative fuels for small scale and industrial combustion
- The consequences of using challenging fuels for furnace design, boiler operation and emissions
- Approaches for adaptations of technical design
- Outlook for new boiler materials and limits in steam temperature
The workshop agenda will follow soon on this website .
Review paper on modelling Slagging and Fouling in Cofiring available
A review paper on models and tools for predicting slagging and fouling in installations that cofire biomass, was prepared under coordination of KEMA and is available here.
Continuation of Task 32
Task 32 has received an extension of its activities until 2012. From 2010 onwards, the number of countries involved will increase to 14. Activities to be performed are
| Workshops: |
Task studies |
|
|
Status report on biomass cofiring available
Task 32 prepared a technical status report on biomass cofiring, based on the updated cofiring database as well as other information. The report can be obtained here.
Expert meeting on high percentage biomass cofiring in new power plants
At the European Bioenergy Conference in Hamburg (June 2009), Task 32 organised a workshop on options for high percentage biomass cofiring in new power plants. The full report and all individual presentations can be obtained here.
Expert meeting on increasing cofiring percentages in existing power plants
Task 32 organised an expert meeting on 21 October 2008 in Amsterdam on increasing cofiring percentages in existing coal fired power plants. The presentations can be obtained here.
Expert meeting on new developments in small scale biomass combustion technologies
Task 32 organised an expert meeting on 20 October 2008 in Amsterdam on new developments in small scale combustion technologies, with a focus on cleaner combustion. The presentations can be obtained here.
Handbook of Biomass Combustion and Cofiring in Chinese!
The Handbook of Biomass Combustion and Cofiring has been translated into Chinese by the Chinese Center of Energy and Environmental Protection, Ministry of Agriculture. During the recent Task meeting, held in Beijing, the book was presented to members of Task 32.
Individual presentations from the export workshop on biomass cofiring opportunities in China can be downloaded here.
Report available on particulate emissions from biomass combustion on IEA Bioenergy Task 32 member countries
One of the major arguments against small scale biomass combustion systems is the relatively high concentrations of aerosols emitted in many cases. With technology development, the quantities of aerosols emitted from biomass combustion systems have however significantly improved over time. Between different systems, significant differences in emission factors can be observed.
Task 32 carried out an inventory of particulate emissions originated from small biomass combustion systems used in its member countries. The inventory yielded interesting information on emission factors of different small scale combustion systems (woodlog stoves, pellet stoves, open fireplaces, etc) currently on the market. The report also evaluates the influence of the different measurements standards in use for measuring aerosols.
The work was done under coordination of Verenum, Switzerland, with major input from SP, Sweden and other task 32 members.
The report is available here for download (1.8 MB).
Expert workshop on Aerosols from Biomass Combustion held in Jyväskylä, 3 sept 2007
At BIOENERGY 2007, held 3-6 Sept 2007 in Jyväskylä, Finland, Task 32 organised an expert workshop on 'Aerosols from Biomass Combustion'. The presentations are available here.
Report of Berlin Task 32 meeting available
The minutes of the 1th task 32 meeting in the new triennium, held May 2007 in Berlin, Germany, are available here for download (8 MB).
2nd edition of Handbook on Biomass Combustion and Cofiring can be ordered!
The first edition of the Task 32 produced Handbook on Biomass Combustion and Cofiring is completely sold out. A new, revised edition has been prepared and is now available here.
Task 32 organised workshop on Pretreatment and System Analysis in Berlin
At the 14th European Conference and Exhibition on Biomass held in Berlin, Task 32 organised a workshop on 'Fuel storage, handling and preparation and system analysis for biomass combustion technologies', The presentations are available here.
Report available on determination of efficiencies of automatic combustion plants
With
support of Task 32, Verenum of Switzerland and CRA Gembloux of Belgium
evaluated different methods for the determination of the efficiencies of
automatic biomass combustion plants.
For this purpose, detailed formula for the combustion efficiency, the boiler efficiency and the annual plant efficiency were described and methods for direct and indirect determination are distinguished. Furthermore, a calculation of the uncertain¬ties is carried out for each method.
The report is available here for download (2.3 MB).
Workshop on Ash Deposition and Corrosion
In combination with a task meeting, Task 32 organised a workshop on ash deposition and corrosion on 20 Sept 2006 in Glasgow, Scotland. Presentations of this event are available here.
Report of workshop on fuel flexibility
At the World Bioenergy 2006 conference in Jönköping, Sweden, held May 30-June 1, 2006, Task 32 organised a workshop on fuel flexibility issues in biomass combustion systems. Click here for more information and the report.
New version of Average Fuelsim available
Average-Fuelsim is a relatively simple, but useful, mass, volume and energy balance spreadsheet written in MS-EXCEL for continuous combustion processes. Version 1.2. is now available, amongst others it contains a correction of a few minor errors. It can be downloaded here.
Workshop on public perception of biomass cofiring
Task 32 has organized a workshop on the public perception of biomass cofiring at the conference on Science in Thermal and Chemical Biomass Conversion, August 30-Sept 3, 2004 in Victoria, Canada.
The report of the workshop can be downloaded here. Task members can download the draft minutes of the Task meeting of 3 September 2004 here.
End of Task report now available
A report has been prepared that describes the progress that has been achieved by Task 32 in the triennium 2001-2003. It can be downloaded here (970 kB).
Two new reports available on biomass CHP systems
|
Two new reports, related to biomass combustion based CHP systems have been produced by BIOS with very interesting details. The titles are:
|
 |
Report available on Cumulative Energy Assessment
|
A report has been produced by VERENUM on 'Evaluation of Biomass Combustion based Energy Systems by Cumulative Energy Demand and Energy Yield Coefficient'. The work has been supported by Task 32. Click here to download the full report (1.61 MB).
|
 |