| 1. |
- Andersson, Petra, et al.
(författare)
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Innovativa elsystem i byggnader : konsekvenser för brandsäkerhet
- 2019
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- Det sker en snabb teknikutveckling i den elektriska miljön i byggnader, framförallt i våra bostäder. Ett exempel är lokal produktion av el, där solcellsinstallationer blir alltmer populära. Sådan elproduktion medför även förändringar i övriga delar av byggnaders elektriska infrastruktur, såsom DC-nät och i vissa fall energilagring i batterisystem. Utvecklingen sker till stor del som ett svar på behovet av mer hållbara lösningar, ur ett växthuseffektperspektiv, för vår elförsörjning, och förstärks bland annat av statligt stöd och ökad tillgänglighet på marknaden.Ny elektrisk teknologi kan leda till ökad brandrisk och denna förstudie har haft som mål att undersöka denna problematik. Metoden har varit workshops med intressenter och experter inom området, intervjuer, samt litteraturstudier.Av de studerade områdena förefaller solcellsanläggningar skapa störst utmaningar i framtiden om inget görs. Detta beror dels på bristfälligt regelverk men även på att dessa system är distribuerade i byggnaderna med flera delar som kan orsaka brand och att delar är exponerade för utomhusklimat vilket får stora konsekvenser vad gäller uppkomst av fel.Brandsäkerheten i samhället har sett ur ett långt tidsperspektiv väsentligt förbättrats. Detta har huvudsakligen drivits fram med hjälp av ett förbättrat regelverk, som ofta inkluderat förbättrade provnings- och kvalificeringsmetoder. En generell observation i detta projekt är att regelverket inte hinner utvecklas i samma takt som tekniken. Detta är en ofta återkommande utmaning inom brandsäkerhet, men gäller speciellt för de teknikområden som behandlas i denna rapport där utvecklingen går mycket snabbt, och de ingående komponenterna nästan uteslutande har stor inneboende brandpotential. Rapporten konstaterar att för att skapa ett relevant regelverk behövs tillämpad forskning, så kallad prenormativ forskning, inom prioriterade områden för att besvara de frågor som ställs vid formulerandet av nya regler och standarder. Exempel på områden som bör prioriteras är 1) komplettering av det än så länge magra statistiska underlaget för bränder i solcellsinstallationer med olycksutredningar, och studier av redan befintliga olycksutredningar, 2) studier av branddynamiken i solcellsinstallationer, såväl byggnadsapplicerade som integrerade, och såväl tak- som fasadmonterade sådana, 3) studier av ljusbågars uppkomst och hur dessa kan undvikas, alternativt hur det kan undvikas att de ger upphov till bränder, 4) skapa underlag för säker installation av batterilager, samt 5) kvalitetssäkring av så kallade second-life batterier, dvs. begagnade batterier, som används i batterilager.
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| 2. |
- Andersson, Petra, et al.
(författare)
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Riskreducerande åtgärder för dödsbränder i bostäder
- 2018
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- Thisreport summarizes the work conducted within the project ”Analysis of physicaldeterminants and technical measures in support of the zero vision” financed bythe Civil Contingency Authority (MSB) in Sweden. The work aims to find measuresto prevent and reduce the number of fatalities in fires in residentialbuildings in a Sweden, a list of such measures is provided in the end of thereport. The list is based on work conducted in several small sub-projects, ashort summary of these is also provided in the report.
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| 3. |
- Barton, John, et al.
(författare)
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The effect of oxygen concentration on selected industrial products in the open controlled atmosphere cone calorimeter
- 2022
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Ingår i: Fire and Materials. - : Wiley. - 0308-0501 .- 1099-1018. ; 46:4, s. 617-627
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Tidskriftsartikel (refereegranskat)abstract
- Past research on the effect of oxygen concentration on the heat release rate and carbon monoxide yield has focused on materials in isolation and there is a lack of research that studies end-use products. This paper investigates the effect of oxygen concentration on the heat release rate per unit area (HRRPUA) and carbon monoxide yield for two different cables and a mineral oil used as an operating fluid for vacuum pumps. A standard cone calorimeter was used to conduct the tests at an ambient oxygen concentration of 21% and an open controlled atmosphere cone calorimeter (OCACC) was used for the tests conducted below 21%. The OCACC allows cone calorimeter tests to be run at different oxygen concentrations by attaching a chamber to the standard cone calorimeter. The effects of oxygen concentration on the HRRPUA and carbon monoxide yield for the cables were limited when there was flaming over the entire exposed surface area. For the mineral oil, there was a large decrease in the HRPPUA at a reduced oxygen concentration, but the carbon monoxide yield appeared to be unaffected.
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| 4. |
- Ek, Åsa, et al.
(författare)
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Relationship between safety culture aspects - A work process to enable interpretation
- 2014
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Ingår i: Marine Policy. - : Elsevier BV. - 1872-9460 .- 0308-597X. ; 44, s. 179-186
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Tidskriftsartikel (refereegranskat)abstract
- Knowledge about the existing safety culture in a maritime organization such as in shipping companies or on board ships can enable the formulation of effective interventions to maintain and improve safety culture and safety in the organization. When assessing the safety culture, questionnaires developed for this purpose are often used. This paper proposes a work process that facilitates the analysis and interpretation of the relationships between safety culture aspects using questionnaire data. The work process includes the use of variable cluster analysis where the cluster solutions are presented in dendrograms. These were found to be an excellent way to visualize complex relationships in the quantitative data and to facilitate the understanding of the safety culture concept. Results are presented from applying the statistical process to safety culture data from six Swedish ships in international traffic. The visualized safety culture results can enable group discussions about safety on different organizational levels and can constitute an important input to the continuous improvement processes for safety and safety culture.
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| 5. |
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| 6. |
- Gehandler, Jonatan, et al.
(författare)
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Tactical depressurization of hydrogen containers with civilian rifle and ammunition
- 2022
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- There can be situations, for example if gas containers have been damaged in a vehicle crash, when the fire and rescue service would like to depressurize the gas containers through shooting with a civilian rifle. Modern high-pressure hydrogen containers are designed for a working pressure of 700 bars. This means that they have a very thick and strong shell made of composite material. At the same time the fire and rescue service only have access to civilian rifles and ammunition that can be bought for hunting purposes. Thus, tactical and safe depressurization of hydrogen containers is a big challenge. RISE have, together with the Södra Älvsborgs Fire and Rescue Services (SÄRF), Swedish Civil Contingency Agency, and Lund University conducted shooting tests of gas tanks mounted on a hydrogen gas vehicle and three stand-alone hydrogen gas tanks. The shooting tests were conducted at Remmene shooting field in Sweden. Thirteen shooting tests with hydrogen tanks placed in favouarable positions were performed. Out of these, only four tests were succesful in puncturing the individual gas tank in a single shot. Furthermore, two unwanted events occurred; one rupture (after 7 shots) and two powerful jets (after 20 and one shot respectively). This shows that further development and research is required in order to develop a method to safely depressurize high pressure hydrogen tanks.
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| 7. |
- Guldåker, Nicklas, et al.
(författare)
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Residential Fires in Metropolitan Areas: Living Conditions and Fire Prevention
- 2023
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Ingår i: Residential Fire Safety : An Interdisciplinary Approach - An Interdisciplinary Approach. - Cham : Springer International Publishing. - 2731-3646 .- 2731-3638. - 9783031063244 - 9783031063251 ; :1, s. 307-326
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Bokkapitel (refereegranskat)abstract
- This chapter addresses the benefits of geo-statistical approaches in fire prevention processes, especially in the prevention of residential fires in urban areas. The aim is to demonstrate how residential fire incidents can be theorized and placed in a context where geo-statistical techniques and an area-based approach can support the emergency services fire prevention work. The chapter introduces theoretical concepts such as Fire Risk Environment, Fire Protection Capability, as well as determining factors, types of residential fires, and various hypotheses for further analysis of residential fires in urban contexts. Key themes are the development of residential fire incidents in different metropolitan areas over time, how different types of residential fires can be connected to living conditions, and finally how the emergency services and other actors can work with area-based fire prevention. Examples from Sweden’s major cities and especially the city of Gothenburg are used. The results show that variations in spatial residential fire patterns can be explained by a variation of living conditions. The conditions may also look different depending on the residential area and housing conditions, and therefore, preventive strategies and proactive measures should differ between and within cities and be adapted to specific different areas.
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| 8. |
- Husted, Bjarne Paulsen, et al.
(författare)
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Verification, validation and evaluation of FireFOAM as a tool for performance based design
- 2018
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- The open source CFD code FireFOAM has been verified and validated against analytical solution and real fire tests. The verification showed that FireFOAM solves the three modes of heat transfer appropriately. The validation against real fire tests yielded reasonable results. FireFOAM has not been validated for a large set of real fires, which is the case for FDS. Therefore, it is the responsibility of the user to perform the validation, before using the code.One of the advantages of FireFOAM compared to the Fire Dynamic Simulator is that FireFOAM can use unstructured grid.FireFOAM is parallelised and scales reasonable well, but is in general considerably slower in computation speed than the Fire Dynamic Simulator. Further, the software is poorly documented and has a steep learning curve. At present it is more a tool for researchers than for fire consultants.
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| 9. |
- Jacobsson, Joel, et al.
(författare)
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Pressurisation as a part of firefighting in buildings
- 2024
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Ingår i: BOOK OF ABSTRACTS Nordic Fire & Safety. - : RISE Research Institutes of Sweden. - 9789189971080 ; , s. 37-
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)
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| 10. |
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