Year-end Sale % OFF 
Abstract
The overall chemical rate and chemical effect of CF3Br, 2-BTP and 2-BTP/CO2 with hydrocarbon flames are calculated using the perfectly stirred reactor (PSR) model. The chemical effects of CF3Br with CH4/air flames always inhibit combustion. The chemical saturation concentration of CF3Br in stoichiometric and lean (Φ = 0.6) CH4/air flames at 298 K and 1 bar is roughly 2.5% and 0.8%, respectively. The overall chemical rate of 2-BTP with moist C3H8/air flames is always less than the uninhibited condition and fluctuates with sub-inerting agent additions. The net chemical effect variation of 2-BTP is more complicated than experimented and calculated flame speeds with 2-BTP added to lean hydrocarbon flames. There are negative chemical effects (chemical combustion effects) with certain sub-inerting 2-BTP concentrations (0.015 ≤ Xa ≤ 0.034), which result in the experimented unwanted combustion enhancement in lean moist C3H8/air flames. CO2 can obviously improve the inhibition effect of 2-BTP in lean moist C3H8/air flames, driving negative chemical effects (enhance combustion) into positive chemical effects (inhibit combustion) with lean moist C3H8/air flames. No enhanced combustion would occur with the blends (2-BTP/CO2) when CO2 addition is larger than 4% in Φ = 0.6 moist C3H8/air flames at 298 K and 1 bar.
Highlights
Numerous efforts have been made to develop new halon alternatives due to the Montreal Protocol of banning the effective fire suppressant CF3 Br
The inhibition effectiveness of 2-BTP is comparable with CF3 Br, and more efficient than that of hydrofluorocarbon (HFCs)
2-BTP failed the US Federal Aviation Administration (FAA) aerosol can test (FAA-ACT) [3] and caused overpressure rise when added in sub-inerting concentrations
Summary
Numerous efforts have been made to develop new halon alternatives due to the Montreal Protocol of banning the effective fire suppressant CF3 Br. As one of the most promising halon alternatives, CF3 CBrCH2 (2-BTP) has a double bond, which can be decomposed into inhibiting species The inhibition effectiveness of 2-BTP is comparable with CF3 Br, and more efficient than that of hydrofluorocarbon (HFCs). Many researchers found the unwanted promotion effect caused by 2-BTP added to lean hydrocarbon air flames. 2-BTP failed the US Federal Aviation Administration (FAA) aerosol can test (FAA-ACT) [3] and caused overpressure rise when added in sub-inerting concentrations. Many numerical and experimental investigations have been performed aiming at further understanding the properties of 2-BTP. Linteris et al simulated the conditions of the FAA-ACT test and found that the Energies 2018, 11, 2670; doi:10.3390/en11102670 www.mdpi.com/journal/energies
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
