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Safety is the highest priority
Highly precise simulation
We verified and validated DES by the simulation regulation of the U.S. National Institute of Standards and Technology (NIST). In the precise way, using a 10 cubic centimeters as units to rebuild a realistic fire scene. We employ 3D way in “Fireproof and Escape Safety Capability Examination” to make accurate simulations on fire scene as well as the situation of evacuation.
We have finished various large areas and conducted simulation analysis. Enhance accelerate reaction and evacuation time.
Safe direction
Safety is HEX’s DES prime concern. Our system shows that people viable egress directions by adopting high-standard verification and validation in simulation software (FDS+EVAC), which help us make further improvement on the product by obtaining useful data.
FDS simulation
An authoritative software developed by the U.S. National Institute of Standards and Technology (NIST) analyzes the changes on temperatures of gases and solids, pressure, and concentrations of smoke at fire scenes in time progresses.
Figure 1
In the simulation clip (figure 1), that is the changes in temperatures in 12 isolated spaces at a fire scene.
EVAC simulation software
Developed by the VTT Technical Research Centre of Finland, this software provides useful analysis by simulating the circumstances of high-density crowd evacuations. It also takes into the psychological factors involved as crowds encounter suddenly changes at fire scenes, thus conducts a more realistic imagine of emergency situations.
Know the FED figure well
After nearly four decades of research and analyses from countless experiments on smoke at fire scenes by scientists around the world, a numerical indicator was formed called “Fractional Effective Dose”, or FED, which is the most important representation of the level of hazard at fire scenes. This is comprehensive indicator combines concentrations of carbon monoxide, hydride, hydrochloric acid, and hydrogen bromide, showing the “dose level of combined gases that pose hazard to humans”. Breathing in a minimal amount of the FED (figure>1) at a fire scene could result in a fatality rate higher than 50%. This is a generally accepted standard that reflects the loss of human mobility in a fire scene due to toxic smoke.
FED fatality curve: FED fatality curve: On figure 1, the FED value on the left side and right side exits shows that beginning at 304 seconds, the FED value on the left exit surpasses 1.0, represent that fatality rate is higher than 50%.
FED fatality curve: FED fatality curve: On figure 1, the FED value on the left side and right side exits shows that beginning at 304 seconds, the FED value on the left exit surpasses 1.0, represent that fatality rate is higher than 50%.
Well-rounded emergency evacuation plan
By observing fire simulations, changes in smoke FED figures, and an aggregate consideration of walking distances, we are able to calculate the safest and safety egress route for each evacuation scenario, and passes the evacuation path information to crowds on-site through DES, effectively forbids crowds far from entering hazardous areas when in panic mental condition.