Water Mist and Cultural Heritage: can Simulation Tools help assessing its effect?

The_Blue_Boat_1892_Winslow_Homer – Museum of Fine Arts – Boston 

Watercolor images are among the most vulnerable artefacts to the effects of firefighting water  systems.

According to the NFPA 750 definition, watermist is a water spray for which the 99% of the total volume of liquid (Dv0.99) is distributed in droplets with a diameter smaller than 1000 microns at the minimum design operating pressure of the water mist nozzle.A slightly different definition has been introduced by the CEN/TS 14972,  as a water spray for which the 90% of the total volume of liquid (Dv0.90) is distributed in droplets with a diameter smaller than 1000 microns at the minimum design operating pressure of the water mist nozzle. Continue reading “Water Mist and Cultural Heritage: can Simulation Tools help assessing its effect?”

Water mist for Protection of Heritage – Cost C17 Final report

Water mist for fire protection is a relatively new technology with specific advantages to the built heritage. Many fixed installations have been commissioned throughout Europe and many research activities are on-going or beingconsidered.

The standard design and manufacturing processes do not currently address heritage applications, but performance-based codes are favourable for introducing new water mist systems. This report establishes the current level of experience, and presents basic information about water mist for the heritage community. The challenges, implications and perspectives of the technology are outlined in order to ensure the best protection of European heritage. A guide on how to accept or approve mist systems in heritage properties is given.

Water mist application is the most subtle method of water extinguishing of fires. It provides a safe and practical environment for rescue work, it protects visitors and staff, and it incurs minimal secondary damage in valid or unintentional activations and substantially removes harmful particles from smoke.

Istantanea 2009-11-06 19-35-05

Continue reading “Water mist for Protection of Heritage – Cost C17 Final report”

Water Mist in Cultural Heritage Buildings

cowiWater mist for fire protection is a relatively new technology with specific advantages to the built heritage. Many fixed installations are commissioned throughout Europe and many research activities are ongoing or being considered.

The standard making processes does not currently address heritage applications, but performance- based codes are favorable for introducing new water mist. The COST Action C17 WG here reports on the experience this far and presents basic knowledge about water mist for the heritage community. Challenges, implications and perspectives of the technology are outlined in order to ensure the best protection of the European heritage possible. A guide on how to accept or approve of mist systems in heritage is given in the white paper (dated July 2004) from Riksantikvaren – The Norwegian Directorate for Cultural Heritage (RNDCH).

Water Mist in Heritage Report 12 July 2004