This episode of the Fire Science Show welcomes once again Adam Barowy from the Fire Safety Research Institute to shed light on the pressing issue of fire hazards in electric mobility devices.

In this episode, we give a follow-up to ep. 085 with Adam, which was published one year ago. One year in the world of e-mobility is a lot of time, so we have a lot of catching up to do!

We tackle the complexities of standardizing explosion protection for large-scale energy storage and the implications of toxic smoke on human health. We delve into real-world case studies that underscore the urgency of our quest for safer battery usage and regulation. We also discuss the aftermath of an electric scooter fire on the Toronto subway, unravelling the potential danger these incidents pose in congested spaces and the evolving role of safety standards and research in keeping our communities safe. As we also discuss the role of certifications like UL 2272 and the promise of new standards such as UL 1487, join us in this episode to equip yourself with the knowledge to navigate an electrified world responsibly.

I promised Adam to plug in the https://batteryfiresafety.org/ - a public campaign focused on spreading knowledge in the safe use of batteries. 

Photo credit - a still frame from FSRI excellent video at https://batteryfiresafety.org/

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The Fire Science Show is produced by the Fire Science Media in collaboration with OFR Consultants. Thank you to the podcast sponsor for their continuous support towards our mission.

In this episode of Fire Fundamentals, we dive into the life-saving choreography of fire detection and building automation systems that must work together in case of a fire. We discuss the roles and challenges related to:

• fire detection and signalling;
• control panels and fire scenarios;
• smoke control and compartmentalization;
• power and water supply and management.

We also discuss the sources of potential delays in device operation, and how some of those are consciously built into the system as a means for false alarm mitigation.

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The Fire Science Show is produced by the Fire Science Media in collaboration with OFR Consultants. Thank you to the podcast sponsor for their continuous support towards our mission.

In episode 48, my guest Mike Spearpoint said that in mid '90s, he participated in experiments on vehicle fires, as at that time, there were doubts if the design fires of that time (developed in the '80s) were representative of modern cars. Fast forward 30 years ahead, and we seem to be in a very similar situation. We have limited knowledge on vehicle fires, most coming from very old studies that have used even older vehicles... And we have a fleet that consists of larger vehicles, gravitating to alternative fuels and batteries. We urgently need a new design fire, and in my opinion not just that - we need a new design fire paradigm for the car parks.

In this episode, I'm explaining the struggles we had choosing a design fire for our NCN OPUS grant on the multiparametric study of fire risk in wind conditions financed by the National Centre of Science in Poland. We have went through the literature, and looked through all of the available data, to figure out some data points we could implement in our studies.

In the episode, I will share those data points (and you may refer to a paper which I will link as soon as it is published), but also cover my ideas related to:

• how do we carry out experiments on vehicles, and how does the experimental setup change the outcome;
• what is the design fire, and why do we need one?
• what are the goals of our design and why design fire should start with the goals in mind.

The design fire is not a representation of a real fire. It is a test scenario that allows us to carry useful engineering judgement. This episode is all about this idea, and how I am making sure that my current assumptions reflect the changes in the modern car fleet. Enjoy!

Some additional resources:

• Mohd Tohir's PhD thesis that gives the best overview of data up to 2014
• Our paper from 2014 which explains some assumptions for the car park smoke control design and summarizes experiments (in Polish)

Badania przedstawione w odcinku podcastu przeprowadzono w projekcie realizowanym an podstawie umowy UMO-2020/37/B/ST8/03839 do projektu badawczego nr 2020/37/B/ST8/03839 pt. Skutki oddziaływania wiatru na pożary budynków w wieloparametrycznej ocenie ryzyka z wykorzystaniem metod numerycznych.

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The Fire Science Show is produced by the Fire Science Media in collaboration with OFR Consultants. Thank you to the podcast sponsor for their continuous support towards our mission.

It's time to learn about "the evacuation equation" from one of its creators. This week I interview prof. David Purser about the elements that go into the evacuation process that help us determine the fire safety of buildings. We go through the components of the Required Safe Evacuation Time (RSET) one by one:

• detection time
• alarm time
• pre-movement
• occupant movement and congestion.

We discuss how those were initially defined, what the assumptions behind establishing them as a part of the framework were, and what engineering scenarios they responded to. Prof. Purser explains the similarity behind the "human behaviour scenario" and the "design fire scenario" as both being inaccurate descriptions of the real world but valuable for design.

We also discuss cases in which those simple assumptions perhaps did not hold, such as the complex case of the Grenfell Tower evacuation. We confront the harrowing reality of communication breakdowns and delayed responses, dissecting how they can dramatically alter the outcome of an emergency. This highlights that the methodology is not "ultimate" and it is up to the engineer to understand the complexities of the process and the weak aspects of it.

The method described in this episode forms the core of PD 7974-6:2019 Application of fire safety engineering principles to the design of buildings - Human factors. Life safety strategies. Occupant evacuation, behaviour and condition (Sub-system 6). The method has been implemented in many local codes throughout the world and can today be considered a standard approach in the fire-safe design of buildings.

In the episode, prof Purser mentioned "new data" on pre-evacuation time. In his IAFSS lecture, he mentioned some sources, including this paper by Lovreglio et al. 

Cover image based on a figure presented in paper 10.3390/buildings13123038

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The Fire Science Show is produced by the Fire Science Media in collaboration with OFR Consultants. Thank you to the podcast sponsor for their continuous support towards our mission.

As we close the curtains on 2023, take a walk with me through the unforgettable milestones that have shaped the Fire Science Show. This isn't just a recap; it's a treasure trove of insights and a roadmap to the innovations just over the horizon. We've come so far together, with download numbers soaring and our influence deepening within the fire science community. My gratitude overflows for the steady support from OFR Consultants in 2023, and the future looks very bright with this collaboration continuing into 2024.

I wish you a great 2024!

Oh. The three big things.
The two of them, you can access right now.

Reach the Book of Fire (newsletter signup)

Access the Fire Science Show community at Circle (and reach the Book of Fire there directly!)

And the third one, investigation fire science specials, you will be able to enjoy around Q2 2024!

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The Fire Science Show is produced by the Fire Science Media in collaboration with OFR Consultants. Thank you to the podcast sponsor for their continuous support towards our mission.

Welcome aboard a journey through the challenges of managing electric vehicle fires at sea with Elena Funk of DBI and Magnus Arvidson from RISE. In this podcast episode, we discuss two large projects devoted to understanding how we can mitigate, suppress and manage EV fires - project Elbas at DBI and project Lash Fire at RISE. Even though the aim of those were ferries and ro-ro ships, the findings are very important and relevant for civil infrastructure like car parks or tunnels.

In the episode, we discuss following technologies:
- fire blankets
- punctuating and injection devices
- water curtains
- low pressure water mist
- drenched systems.

As you can see, we cover a large group of technical solutions used to mitigate and suppress fires. In the episode, you will learn about the challenges related to each of them. We also go into general observations done during the test, also related to the growth and reignition of the fires.

If you would like to learn more, you need to go to the project websites:
ELBAS project at DBI
Lashfire project at RISE

If you want to find Elena's webinar, you can do it here: https://www.linkedin.com/posts/ms-hansen_firesafety-evparkinggarages-webinar-activity-7134936860115525632-mETf

And also, Elena told me after the recording:
One important aspect of fire extinguishment I did not mention on the podcast yesterday is water toxicity after extinguishment.   

RISE, Jonna and colleagues have shown that when the water is applied directly on the battery you get increase in release of certain elements (e.g. PFAS).

https://pubs.acs.org/doi/10.1021/acs.est.2c08581

I think this is a very important observation, and I need to an entire episode on that.

Cover photo credit: DBI project ELBAS,  DBI-ELBAS-FIXFU21008 

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The Fire Science Show is produced by the Fire Science Media in collaboration with OFR Consultants. Thank you to the podcast sponsor for their continuous support towards our mission.

This is an important episode. Our guest for today, UK fire engineer Mary Button, who uses a wheelchair herself, shares some of her own stories and feelings describing the reality for many disabled individuals. Drawing from her own experiences, Mary shares invaluable insights into the cognitive complexities individuals with mobility issues face, physical barriers, and psychological burdens related to the fire evacuation process. But most importantly, I think we touch on the essence here of how the building features disable people and how a shift in your mindset can help you design a more human-friendly (in consequence, people with disability-friendly) environment.

As we venture deeper into this enlightening conversation, we uncover the role of accessible building design in fire safety. Learn how technical aspects such as ramps, door widths, and pressurization systems can make a difference in ensuring safe evacuation. We also question the reliance on evacuation lifts and trained personnel, emphasizing the need for more independent and equal access solutions. 

 By the end of this episode, you’ll have a broader understanding of the importance of inclusive fire safety planning and strategies and the need for greater awareness and empathy towards individuals with disabilities. 

Mary was also very kind to send me some materials. Here they are with her short comment:
The post below discusses why giving a number of potentially disabled people in the population is complicated but also provides a figure from the WHO. I've also linked to the UK government report, which links to statistics on disability prevalence by type in the UK population. Hopefully, these are useful starting points. I've also linked to Erik's Egress Enabler Tool and the accompanying paper.

• https://www.disabilitydebrief.org/debrief/how-many-disabled-people/
• https://www.gov.uk/government/statistics/family-resources-survey-financial-year-2021-to-2022
• https://zenodo.org/records/7075501#.Y5x-9OzP0bm
• https://pubmed.ncbi.nlm.nih.gov/36372652/

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The Fire Science Show is produced by the Fire Science Media in collaboration with OFR Consultants. Thank you to the podcast sponsor for their continuous support towards our mission.

In this part 8 of Experiments that changed fire science series we revisit Cardington (previously covered in part 2 - https://www.firescienceshow.com/078-experiments-that-changed-fire-science-pt-2-bre-cardington-with-tom-lennon/), but this time from the perspective of modeling the structure. My guest prof. Asif Usmani of the HK PolyU takes us on how simplifying the model led them to some fundamental discoveries on the thermo-mechanical response of structures to fires.

We discuss material properties and perhaps their overestimated role in structural modelling. We go into membrane actions and the role of restraints in shaping the response of beams and slabs to thermal loads. And Asif explains to me what this means at a scale of a building frame. Some truly remarkable insights - things that today are perhaps obvious to any structural engineer, but at that time were an unknown fire behaviour. 

Here are some links to the papers related to today's episode:
Cardington
https://www.sciencedirect.com/science/article/pii/S0379711201000376
https://www.sciencedirect.com/science/article/pii/S0143974X01000049
https://www.sciencedirect.com/science/article/pii/S0379711204000116

WTC
https://era.ed.ac.uk/handle/1842/1562

OpenSees
https://link.springer.com/article/10.1007/s10694-021-01184-0
https://www.researchgate.net/profile/Xu-Dai-4/publication/283796522_OpenSees-based_integrated_tool_for_modelling_structures_in_fire/links/5647a6b108ae451880ac4f18/OpenSees-based-integrated-tool-for-modelling-structures-in-fire.pdf

Picture credit: British Steel, after "Newman G, Robinson JT and Bailey CG, Fire safe design: A new approach to multi-storey steel-framed buildings, The Steel Construction Institute, Berkshire, 2006" 
Accessed through:  https://www.researchgate.net/publication/303531122_Shear_panel_component_in_the_vicinity_of_beam-column_connections_in_fire [accessed Dec 06 2023]. 

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The Fire Science Show is produced by the Fire Science Media in collaboration with OFR Consultants. Thank you to the podcast sponsor for their continuous support towards our mission.

In this episode, I am joined by Dr. Carmen Górska from OFR Consultants, the recent IAFSS Phillip Thomas Award recipient for the best paper at the previous IAFSS Symposium. In this interview, we touch on preconceived notions about fire dynamics in timber compartments, and Carmen explains how she has learned the intricate physics behind it. 

The research discussed covers dozens of medium-scale timber (CLT) compartments with different amounts of exposed timber.  The findings relate to the conditions inside (temperatures, heat fluxes), the spatial distribution of the temperature and oxygen within the compartment, charring rates, self-extinction conditions, and external venting fires. 

If you would like to learn more from Carmen, here is her TEDx talk on mass timber, where she explains WHY we need research like this: https://www.youtube.com/watch?v=sKXnKRD2EU4&t=1s
And here is the award-winning paper: https://www.scopus.com/record/display.uri?eid=2-s2.0-85084762058&origin=resultslist
And here is Carmens' PhD Thesis, which goes much deeper into the topic:  https://espace.library.uq.edu.au/data/UQ_ec263ab/s4408332_final_thesis.pdf

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The Fire Science Show is produced by the Fire Science Media in collaboration with OFR Consultants. Thank you to the podcast sponsor for their continuous support towards our mission.

In today's episode, we go into the practical consequences of having an underventilated fire - that is the possibility of backdraught or other similar smoke explosion phenomena. My guest Dr Ricky Carvel from the University of Edinburgh, touches on the chemistry of combustion, explaining why the underventilated fire is different than the oxygen-rich one, and how flammability limits are critical in understanding dynamic phenomena that may occur in a fuel-rich environment. We go into conditions in which backdraughts occur, and how establishing flow-path or reducing smoke layer temperatures may be a way to mitigate the risk. Finally, Ricky shares on some future plans on how to give firefighters a real tool to assess the risk of backdraught.

And of course, we had a ton of fun with the movie Backdraft, and to some extent the American spelling of the word.

Some additional resources:

• Polish firefighters and door implosion video (around the 8th minute mark)  https://www.youtube.com/watch?v=ztrmC8o2UhU
• The videos we created for firefighters can be found here: https://fire.eng.ed.ac.uk/techtalks
• Our short backdraught video from YouTube:
  https://www.youtube.com/watch?v=3kRoKckpJmE
• The Slo-Mo Guys backdraft (sic) video:
  https://youtu.be/ZyCCWuO0mQo?si=NHKkG82clnPOTPbV
• Two of our papers on backdraught/backdraft (FT uses American spellings!):
  https://doi.org/10.1016/j.firesaf.2017.04.003
  https://doi.org/10.1007/s10694-019-00914-9
  
  
  

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The Fire Science Show is produced by the Fire Science Media in collaboration with OFR Consultants. Thank you to the podcast sponsor for their continuous support towards our mission.