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Friday, 14 October 2016

Automist Smartscan steals the show at the 16th Annual International Water Mist Conference

William Makant of Plumis presented the company's new Automist Smartscan technology to a packed and captivated audience at the 16th Annual International Water Mist Conference, held in Vienna September 21-22, 2016, organized by the International Water Mist Association (IWMA).

He presented the story behind the evolution of the James Dyson award-winning Automist®, Automist Smartscan which relocates the traditional spray heads from the ceiling to a wall mounted nozzle, and uses a rotating head that directly targets fires with a powerful jet of water mist. It has been proven to achieve the same performance as residential sprinkler systems and typically uses 90% less water, minimising the potential for water damage to the living space.

Automist Smartscan has risen in popularity among architects and builders for being super easy to retrofit—without requiring a tank or network of pipes. It offers more than a reliable safety device for fighting fires; it’s an intelligent modern design feature offering greater flexibility for projects with challenging building regulations, from loft conversions to more open-plan homes and flats.

The UK has published its first standard for residential water-mist systems BS 8458:2015 which has similarities to UL 2167 and FM 5560 tests, like using a 8m x 4m x 2.5m room and 2.5MW peak HRR 2-foam, crib, heptane pool and plywood wall fire load.  However, the standard has additional testing scenarios such as forced ventilation (to simulate a wind draught) and an “open room” arrangement.  A total of 82 full scale fire tests were carried out at Exova Warringtonfire against this standard test to validate a series of design proposals intended to meet the performance requirements of this standard. 

These included:

- Computational Fluid Dynamics (CFD) and the use of a horizontal planar water-mist blade in an attempt to maximise water density at the base of the fire and away from the ceiling hot layer.
- the use of passive dosing of a surfactant additive to maximise the suppression performance of the deployed water-mist
- the use of alternative detection sensors to reduce time for activation of suppression system
- directional targeting of water-mist to the fire location using a moving spray head and an infra-red sensor to maximise water density where the fire is located.

The key findings were that with small residential fires (the suppression system was activated with fires HRR between 100kW and 600kW), water mist does not operate according to its traditional principle of being drawn into the fire because the small heat release causes less evaporation and creates smaller gas flow velocities in the room.  Additionally, it was noted that some of the BS 8458 objectives, of testing droplet drift through forced ventilation, for example, impacts negatively the performance of traditional sprinklers as much as water mist.  It was concluded that an alternative suppression technique, of creating a turbulent, localised, mist saturated environment was necessary in order to successfully suppress such small fires. 

The event organizer, the International Water Mist Association, is a global association dedicated to water mist firefighting and related technologies, and the Conference drew a crowd of 100 fire safety and water mist industry leaders.

The Automist Smartscan presentation was given a special mention by the Chairman Ragnar Wighus who confirmed the admission of Automist to the exclusive "Archimedes Club" for wise use of watermist technology.  Plumis were honoured with the mention. 

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