Abstract: Abstract: The injection of high-pressure fluoropropanegas in a small hole of an enclosed chamber was modeled investigate their detail behaviors, which was compared with the corresponding experimental measurements. Based on the numerical simulations, the concentration, temperature and velocity during the injection of high-pressure fluoropropane were analyzed. The simulated results indicated that a flowback of the fluoropropane gas was shown near an obstacle, which resulted in the low concentration at the other side of the obstacle. The experimental measurements showed that the lowest temperature at the nozzle was as cold as -20 ℃ during the accidental leakage of high-pressure fluoropropane. However, the temperature decrease near the electrical equipment is acceptable if they are more than 1.75 m away from the leakage orifice.

Key words: Key words: fire safety, fluoropropane, high-pressure injection, cooling damage, computer room, electrical equipment, numerical simulation