| Project: |
Flame Spread Project |
| Research programme: |
CECOST 1 (1999-2002) |
| Participants: |
LTH Fire Safety Engineering (project leader), SP Fire Technology, CTH Energy Conversion, LTH Heat Transfer, LTH Combustion Physics, Göteborg University Physical Chemistry
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| Sponsors: |
The Swedish Foundation for Strategic Research (SFF), Brandforsk, SRV, SBUF
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| Project description: |
Flame spread is an important concept in fire hazard analysis, as it governs the in many cases fast growth of a fire. The aim of the project was to improve CFD simulation of flame spread and fire growth. The project contained improvement of models for important physical sub-processes, as well as experimental work for validation purposes.
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| SP main activities: |
The aim of the work was to design experiments and to provide experimental data for validation of different sub models and the total model in computer programs (CFD) for calculation of realistic flame spread scenarios. A series of large-scale flame-spread experiments with three different building materials was carried out [1]. Thermal properties for these materials, from room temperature to elevated temperatures, were determined using the TPS-method [2].
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| SP publications: |
| [1] |
Blomqvist P. and Van Hees P., “Upward flame spread experiments - a preparatory study”, SP Technical Report 2001:32 |
| [2] |
Adl-Zarrabi B. and Boström L., “Determination of Thermal Properties of Wood and Wood Based Products by Using Transient Plane Source”, Proceedings of the 8th World Conference on Timber Engineering | |
| Further information: |
Per Blomqvist |
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| Project: |
Spontaneous ignition in stored biofuels and biological waste |
| Research programme: |
CECOST 2 (2002-2005) |
| Participants: |
LTH Fire Safety Engineering (project leader), SP Fire Technology, LTH Building Technology, Växjö University
|
| Sponsors: |
The Swedish Energy Agency (STEM), Brandforsk, SRV
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| Project description: |
Spontaneous combustion of long-term storage is a long-standing practical problem that, in spite of extensive and intensive studies, has proved to be so intractable that there is still need for a definitive working model capable of prediction of ignition behaviour with accuracy. The main aim was to develop a prediction tool for the evaluation of waste material that needs to be stored in anticipation of material or energy recycling. This enables users to determine the correct method of storage to minimise the risk for self-ignition. The project contained model development [1], analysis of biological [2] and chemical activity in biofuel such as sawdust, wood chips and wood pellets, determination of thermal properties, and validation experiments of spontaneous ignition in sizes from 1 dm3 to 1 m3.
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| SP main activities: |
Chemical activity from small-scale experiments [3-5], thermal properties [4], and large-scale validation experiments [4-5].
|
| SP publications: |
| [1] |
Zhenghua Yan, Per Blomqvist, Ulf Göransson, Göran Holmstedt, Lars Wadsö, Mehri Sanati and Patrick Van Hees, ”Validation of CFD Model for Simulation of Spontaneous Ignition in Bio-mass Fuel Storage”, Proceedings of the 8th IAFSS, Peking September 2005 |
| [2] |
Katarina Rupar-Gadd, Lars Wadsö, Göran Holmstedt, Bror Persson, Per Blomqvist and Mehri Sanati, “Biomass resources Spontaneous Combustion of Biofuels caused by Microbial Activity”, Proceedings of 2nd World Conference and Technology Exhibition on Biomass for Energy, Industry and Climate Protection, 10-14 May 2004, Rom, Italy |
| [3] |
Per Blomqvist and Bror Persson “Spontaneous Ignition of Biofuels- A Literature Survey of Theoretical and Experimental Methods”, SP AR 2003:18, Borås 2003
|
| [4] |
Blomqvist, P. and P.V. Hees, “Spontaneous Ignition of Biofuels - An Experimental Investigation through Small- and Large-Scale Tests”, SP Report 2006:41, Borås 2006 |
| [5] |
Per Blomqvist, Henry Persson, Patrick Van Hees, Göran Holmstedt, Ulf Göransson, Lars Wadsö, Mehri Sanati and Katarina Rupar-Gadd, ”An Experimental Study of Spontaneous Ignition in Storages of Wood Pellets”, Proceedings of Fire and Materials 2007, 29th - 31st January 2007, San Francisco, California, USA | |
| Further information: |
Per Blomqvist |
| |
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| Project: |
Biofuel Project - Spontaneous ignition |
| Research programme: |
CECOST 3 (2006-2009) |
| Participants: |
LTH Fire Safety Engineering (project leader), SP Fire Technology, LTH Building Technology, Växjö University
|
| Sponsors: |
The Swedish Energy Agency (STEM), additional sponsors are welcomed (February 2007)
|
| Project description: |
Continuation of the work initiated in the “Spontaneous ignition in stored biofuels and biological waste project” (see above). The aim will be on pelletized fuel, near production and new types of raw materials. Development and validation of the prediction tool, development of characterization methods, and validation experiments in different scales.
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| SP main activities: |
Study of pellet properties near production, use and assessment of prediction tool, and validation experiments [1-2].
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| SP publications: |
| [1] |
Persson, H., P. Blomqvist, and Z. Yan, ”Brand och brandsläckning i siloanläggningar - En experimentell studie”, SP Report 2006:47, Borås 2006 (in Swedish) |
| [2] |
Per Blomqvist, Henry Persson, Patrick Van Hees, Göran Holmstedt, Ulf Göransson, Lars Wadsö, Mehri Sanati and Katarina Rupar-Gadd, ”An Experimental Study of Spontaneous Ignition in Storages of Wood Pellets”, Proceedings of Fire and Materials 2007, 29th - 31st January 2007, San Francisco, California, USA | |
| Further information: |
Per Blomqvist |