TY - CONF A1 - Amano, K.O.A. A1 - Hahn, S.-K. A1 - Tschirschwitz, Rico A1 - Rappsilber, Tim A1 - Krause, U. T1 - Experimental Investigation on Explosion Pressure Characteristics of Lithium-based (NMC) Pouch Batteries during Thermal Runaway N2 - Lithium ion batteries (LIBs) are prone to spontaneous and subsequent fire or explosion resulting from thermal runaway. The vented gases are not only toxic and flammable, their emission can also raise the surrounding pressure rapidly. In this study, characteristic variations of explosion pressure rise, rate of explosion pressure rise and đŸ(sT)-value have been evaluated. The characteristic đŸ(𝑠𝑇)-values were determined to evaluate the explosive behavior of LIBs during thermal runaway. The estimated values were compared to that of other explosive substances. T2 - Batterieforum Deutschland 2021 CY - Online meeting DA - 20.01.2021 KW - Pressure KW - Lithium KW - Thermal Runaway KW - Battery KW - Pouch PY - 2021 AN - OPUS4-52033 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Wu, Z. A1 - Guo, X. A1 - Xie, G. A1 - Yan, T. A1 - Wu, Dejian A1 - Zhang, F. A1 - Ang, R. T1 - Heat and electric flux coupling of closed-loop thermoelectric generator N2 - Thermoelectric generator (TEG) has been proved as a promising technology for directly converting heat into electricity based on Seebeck effect. On the contrary, this electricity can trigger a solid-state cooling based on conventional Peltier effect. However, these two effects induce a coupling between heat and electric flux, especially for the quantitative relationship still remaining a mystery. Here, we show experimental evidence and theoretical calculation for the coupling by monitoring transient response of fluid temperature and output power. The experimental maximum heat flow in open circuit is 1162 W at cold fluid flow rate = 0.3 m3/h and fluid temperature difference ΔTf = 70 °C, enhanced by 13% owing to heat compensation from intrinsic coupling in closed-loop circuit. Meanwhile, the measured maximum output power of TEG is 18.2 W, and subsequently decreases to 15.4 W due to the objective existence of coupling. This double-edged sword in coupling vigorously inspires the potential applications in heat-dissipation situation such as spacecraft, electronic components, photovoltaic, refrigerator and etc. Present findings open a novel avenue for manipulating heat-electricity conversion in practical engineering. KW - Thermoelectric generator PY - 2021 DO - https://doi.org/10.1016/j.enconman.2021.114529 SN - 0196-8904 VL - 244 SP - 1 EP - 13 PB - Elsevier Ltd. AN - OPUS4-53661 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Tschirschwitz, Rico T1 - Sicherheit elektrochemischer Energiespeicher in Second Life Anwendungen (SEE-2L) – Vorstellung des Verbundprojekts und Ergebnisse aus Vorversuchen N2 - Der Vortrag stellt das BMBF-Verbundprojekt SEE-2L (Sicherheit elektrochemischer Energiespeicher in Second Life Anwendung) vor. DarĂŒber hinaus werden Ergebnisse aus Vorversuchen der UniversitĂ€t Magdeburg vorgestellt, in denen Untersuchungen an Batteriezellen hinsichtlich der Gasfreisetzung beim thermischen Durchgehen durchgefĂŒhrt wurden. T2 - Projekttreffen BMBF-Vorhaben ALBERO CY - Online meeting DA - 20.04.2021 KW - StationĂ€re Energiespeicher KW - Elektrische Energiespeicher KW - EES KW - Auswirkungsbetrachtungen PY - 2021 AN - OPUS4-52481 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Jiang, C. A1 - Xie, G. A1 - Wu, Dejian A1 - Yan, T. A1 - Chen, S. A1 - Zhao, P. A1 - Wu, Z. A1 - Li, W. T1 - Experimental investigation on an energy-efficient floor heating system with intelligent control: A case study in Chengdu, China N2 - The space heating system accounts for 20%~50% of building energy consumption, and may lead to energy waste due to unreasonable controls. In this study, an energy-efficient floor heating system with intelligent control was proposed to improve energy efficiency of the system. In order to validate the concept of the proposed intelligent control, an experimental system was designed and constructed in Chengdu, China. Temperature, control cycle and energy consumption were then studied under different control strategies. The result shows that a larger flow rate of supply water will result in a longer control cycle and a lower control frequency, i.e., the average control cycle at 7 L min−1 is 1.7 h during the test day, while it is 1.5 h at 5 L min−1. Moreover, adopting water with a higher temperature and flow rate could achieve a higher efficiency of the system. The energy consumptions in case 1 (5 L min−1, 50 °C), case 2 (5 L min−1, 55 °C), case 5 (7 L min−1, 55 °C) and case 6 (7 L min−1, 60 °C) are 4746 kJ, 3534 kJ, 3093 kJ and 3028 kJ, respectively. Based on the experimental data, the supply water temperature is suggested to set lower than 60 °C considering human comfort. KW - Floor heating KW - Intelligent control KW - Experimental KW - Energy consumption KW - Control strategy PY - 2021 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-550522 DO - https://doi.org/10.1016/j.csite.2021.101094 SN - 2214-157X VL - 26 SP - 1 EP - 14 PB - Elsevier Ltd. AN - OPUS4-55052 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Habib, Abdel Karim T1 - P2X: From production to application Safety issues around hydrogen N2 - For hazard Assessment purposes we need models to predict what would happen in case of an accident. The challenge in hazard assessment consists not only in choosing the right model, but beforehand to define the correct scenario. For hydrogen applications the validity of the models has to be checked, as well as the kind of scenario to assume for accidental releases of hydrogen. Open questions on these topics will be adressed and the newly founded competecne centre for Hydrogen Saftey at BAM will be presented. T2 - VDMA Webinar P2X: From production to application CY - Online Meeting DA - 18.05.2021 KW - Hydrogen KW - Hasard assessment KW - Modeling PY - 2021 AN - OPUS4-52678 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Askar, Enis A1 - Holtappels, Kai T1 - Fire and explosion safety for hydrogen technologies N2 - The presentation gives an overview about the research and testing activities of H2Safety@bam in the field of process and plant safety. T2 - HYDROGENIUS BAM Joint Hydrogen Symposium CY - Online meeting DA - 06.07.2021 KW - Explosion protection KW - LH2 KW - Jet-fires KW - Test area PY - 2021 AN - OPUS4-53720 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Askar, Enis T1 - Hydrogen Safety - Explosion Protection for Hydrogen Applications N2 - In this lecture the safety related properties og hydrogen compared to other fuel gases and the explosion protection measures of avoiding flammable mixtures, avoiding ignition sources and mitigating the consequences of explosions when handling hydrogen and hydrogen mixtures are presented. The Joint European Summer School JESS 2021 addresses these issues by offering high quality graduate level courses on selected topics of vehicle technology, innovation & business development, safe handling of hydrogen, and modelling. The course content is tailored to the needs of a diverse audience: newcomers to the field, experienced students, and young professionals working at the forefront of fuel cell and hydrogen applications. T2 - Joint European Summer School (JESS) CY - Online meeting DA - 06.09.2021 KW - Explosionsschutz KW - Explosionsgrenzen KW - ZĂŒndenergie KW - ZĂŒndquellen KW - Auswirkung von Explosionen PY - 2021 AN - OPUS4-53808 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Askar, Enis T1 - Sicherheitstechnische Eigenschaften von Erdgas/Wasserstoff-Gemischen - Auswirkungen auf den Explosionsschutz N2 - Hinsichtlich ihrer sicherheitstechnischen KenngrĂ¶ĂŸen (STK) unterscheiden sich Wasserstoff und Erdgas zum Teil stark. Im Vortrag werden verschiedene STK von Erdgas/Wasserstoff-Gemischen im AbhĂ€ngigkeit des Wasserstoffanteils vorgestellt und die Auswirkung der Beimischung von Wasserstoff zum Erdgas auf die Wirksamkeit von Explosionsschutzmaßnahmen erlĂ€utert. T2 - DVGW-Kongress 2021 "Gasinfrastruktur fĂŒr Erdgas-H2-Gemische" CY - Online meeting DA - 07.10.2021 KW - Explosionsschutz KW - Explosionsgrenzen KW - ZĂŒndenergie KW - Power to Gas KW - Erdgasnetz KW - ZĂŒndquellen PY - 2021 AN - OPUS4-53725 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Tschirschwitz, Rico T1 - Sicherheitstechnische Fragestellungen bei statioĂ€ren EES - Istzustand und zukĂŒnftige Entwicklung/Projekte N2 - Der Vortrag stellt potentielle sicherheitstechnische Fragestellungen beim weiterten Ausbau der stationĂ€ren elektrischen Energiespeicher (EES) in Deutschland dar. DarĂŒber hinaus werden aktuelle AktivitĂ€ten und Projekte der BAM mit Bezug zur Sicherheit von Lithiumbatterien und stationĂ€ren elektrischen Energiespeichern vorstellt. T2 - FachgesprĂ€ch „StationĂ€re elektr. Energiespeicher (EES) und Anlagensicherheit“ CY - Online meeting DA - 29.01.2021 KW - StationĂ€re Energiespeicher KW - Elektrische Energiespeicher KW - EES KW - Auswirkungsbetrachtungen PY - 2021 AN - OPUS4-52116 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Holtappels, Kai T1 - Wasserstoff - EnergietrĂ€ger der Zukunft N2 - Im Rahmen des internationalen Wissenschaftsfestivals, der Berlin Science Week 2021, hat die BAM in einem Beitrag das Kompetenzzentrum H2Safety@BAM, dessen Vision und die vier wissenschaftlichen Kompetenzfelder sowie den dort bearbeiteten Themen bzw. Projekten vorgestellt. T2 - Berlin Science Week 2021 CY - Berlin, Germany DA - 01.11.2021 KW - H2Safety@BAM KW - Materialeignung und -kompatibilitĂ€t KW - BauteilprĂŒfung, -sicherheit und -zertifizierung KW - Prozess- und Anlagensicherheit KW - Sensorik, Analytik und Referenzmaterialien KW - Sicherheit KW - Vertrauen in Wasserstofftechnologien PY - 2021 AN - OPUS4-55136 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -