10.23642/USN.17934047 Lach, Agnieszka Weronika Agnieszka Weronika Lach https://orcid.org/0000-0003-2517-9521 University of South-Eastern Norway Gaathaug Andre Vagner Andre ug Andre Vagner https://orcid.org/0000-0002-7808-1248 University of South-Eastern Norway DataverseNO 2022 Other Hydrogen safety Overpressure TPRD hydrogen release measurements pressure peaking phenomena Large-scale experiment data ignited releases Automotive Combustion and Fuel Engineering (incl. Alternative/Renewable Fuels) Automotive Safety Engineering University of South-Eastern Norway University of South-Eastern Norway USN Research Data Support University of South-Eastern Norway 2022-01-25 2022-01-25 2026-02-13 10.1016/J.IJHYDENE.2020.12.015 10.23642/USN.17934047/0BTQLA 10.23642/USN.17934047/KWZ0SH 10.23642/USN.17934047/QO3VZH 10.23642/USN.17934047/D25KB9 10.23642/USN.17934047/YXBK5B 10.23642/USN.17934047/CKDBHP 10.23642/USN.17934047/HMRBHB 10.23642/USN.17934047/XXPZPF 10.23642/USN.17934047/RHWZXB 10.23642/USN.17934047/TDIIZC 10.23642/USN.17934047/92PHZ3 10.23642/USN.17934047/MF3OJY 10.23642/USN.17934047/EOUJDI 10.23642/USN.17934047/7MDO63 10.23642/USN.17934047/DRGALB 10.23642/USN.17934047/DXCMPF 10.23642/USN.17934047/5GTDNS 10.23642/USN.17934047/CY3NMJ 10.23642/USN.17934047/QXWANO 10.23642/USN.17934047/I4HXOP 10.23642/USN.17934047/WMSDAK 10.23642/USN.17934047/BQJADJ 10.23642/USN.17934047/ZQRNKY 10.23642/USN.17934047/EL02JT 10.23642/USN.17934047/EBFS9Z 10.23642/USN.17934047/DFG9QU 10.23642/USN.17934047/URZFAD 10.23642/USN.17934047/IJ03KS 10.23642/USN.17934047/GIW6EW 10.23642/USN.17934047/CCXOZK 10.23642/USN.17934047/RNL4QC 10.23642/USN.17934047/6GTABJ 10.23642/USN.17934047/GVLMT4 16893 42685282 42200980 41212810 43094870 41741953 41626433 41478900 41937170 41375928 41775223 41315811 40877440 41387557 42131019 40666968 40697671 41678827 41444716 42107531 42273153 41521647 41697746 42872038 42991569 42850620 42086604 42621247 42152718 42508034 43239997 43807775 15264 application/vnd.openxmlformats-officedocument.wordprocessingml.document application/matlab-mat application/matlab-mat application/matlab-mat application/matlab-mat application/matlab-mat application/matlab-mat application/matlab-mat application/matlab-mat application/matlab-mat application/matlab-mat application/matlab-mat application/matlab-mat application/matlab-mat application/matlab-mat application/matlab-mat application/matlab-mat application/matlab-mat application/matlab-mat application/matlab-mat application/matlab-mat application/matlab-mat application/matlab-mat application/matlab-mat application/matlab-mat application/matlab-mat application/matlab-mat application/matlab-mat application/matlab-mat application/matlab-mat application/matlab-mat application/matlab-mat application/vnd.openxmlformats-officedocument.wordprocessingml.document 1.1 Creative Commons Attribution 4.0 International License. DATASET MIGRATED FROM FIGSHARE: <p dir="ltr"><b>HOW TO CITE:</b><br>Lach, Agnieszka; Gaathaug, Andre Vagner (2022). Hydrogen Safety: Pressure Peaking Phenomena-ignited releases. University of South-Eastern Norway. Dataset. https://doi.org/10.23642/usn.17934047.v1<br><br>The Pressure Peaking Phenomena (PPP) is the effect of introducing a light gas into a vented volume of denser gas. This will result in a nonequilibrium pressure as the light gas pushes the dense gas out at the vent. Large scale experiments have been performed to produce relevant evidence. The results were used to validate an analytical model. Pressure and temperature were measured inside a constant volume, while the mass flow and vent area were varied. The analytical model was based on the conservation of mass and energy. The results showed that increasing the mass flow rate, the peak pressure increases and with increasing the ventilation area, the peak pressure decreases. Peak pressure was measured above 45 kPa. Longer combustion time resulted in higher temperatures, increasing an underpressure effect. The experimental results showed agreement with the analytical model results. The model predicts the pressures within reasonable limits ofþ/-2 kPa. The pressure peaking phenomena could be very relevant for hydrogen applications in enclosures with limited ventilation. This could include car garages, ship hull compartments as well as compressor shielding. This work shows that the effect can be modeled and results can be used in design to reduce the consequences.</p> Fuel Cells and Hydrogen 2 Joint Undertaking (JU) under grant agreement No 826193