The extinguishing system will be automatically activated by a pneumatic trigger in the event of a critical rise in temperature (e.g. 30° above the maximum expected operating temperature). This may also be done remotely by electronics or pneumatics. Our fire-fighting system is a fine-spray extinguishing system which uses special nozzles to spray the extinguishing agent as a fine mist. The droplet size selected is large enough to ensure that the droplets have enough kinetic energy to reach the source of the fire. This is particularly important in wind turbines as there may be air flows in the nacelle which prevent this.
The enormous reaction surface of the mist droplets in relation to the quantity of extinguishing agent means that the fire is quickly deprived of a great deal of its energy and the temperature level therefore falls rapidly, thus preventing re-ignition. The cooling effect disrupts the thermal reaction conditions in the seat of the fire, thereby reducing the reaction speed.
To intensify the extinguishing effects described, the extinguishing agent contains a foam-forming additive. The purpose of this is to achieve greater adhesion, thereby improving the success with which the burning materials are extinguished. This mixture plays a crucial role in the effectiveness of the system for specific risks in areas where there are combustible liquids.