TY - CONF A1 - Askar, Enis A1 - Schröder, Volkmar A1 - Göpfert, T. A1 - Winterleitner, E. A1 - Schwarze, M. T1 - Safety related properties of low-GWP refrigerants N2 - Most fluorinated hydrocarbons that shall replace refrigerants with high GWP, like R134a, are flammable. For evaluating inertization measures for explosion protection, flammability of low-GWP refrigerants R1234yf, R32 and R1132a blended with carbon dioxide, nitrogen and argon were studied experimentally in a closed autoclave at atmospheric conditions. Furthermore, a calculation method was adapted to reduce the experimental costs for flammability studies on these gas mixtures. For igniting R1234yf in the closed autoclave a newly developed ignition system was used that allows generating electric arcs with high ignition energy. Gas mixtures containing the mildly flammable R1234yf and R32 could be inerted by adding much less inert gas than mixtures containing R1132a, which is more similar to unfluorinated hydrocarbons regarding the explosion regions. By using the adapted model of constant adiabatic flame temperature profiles estimating the explosion limits of fluorinated hydrocarbons was possible with similar accuracy as for unfluorinated hydrocarbons. Keywords: Explosion Protection, Inertization, Flammability, HFOs, HFC., R1234yf, R32, R1132a T2 - 25th IIR Internationa Congress of Refrigeration CY - Montreal, Canada DA - 24.08.2019 KW - Explosion Protection KW - Inertization KW - Flammability KW - HFOs KW - R1234yf KW - R1132a KW - R32 KW - HFC PY - 2019 SN - 978-2-36215-035-7 DO - https://doi.org/10.18462/iir.icr.2019.0767 SN - 1025-9031 SP - 1 EP - 9 AN - OPUS4-49546 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -