161,070 research outputs found

    Progress in the modeling of H- and D- ion sources

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    Marine NMEA 2000 Smart Sensors for Ship Batteries Supervision and Predictive Fault Diagnosis

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    [EN] In this paper, an application for the management, supervision and failure forecast of a ship¿s energy storage system is developed through a National Marine Electronics Association (NMEA) 2000 smart sensor network. Here, the NMEA 2000 network sensor devices for the measurement and supervision of the parameters inherent to energy storage and energy supply are reviewed. The importance of energy storage systems in ships, the causes and models of battery aging, types of failures, and predictive diagnosis techniques for valve-regulated lead-acid (VRLA) batteries used for assisted and safe navigation are discussed. In ships, battery banks are installed in chambers that normally do not have temperature regulation and therefore are significantly conditioned by the outside temperature. A specific method based on the analysis of the time-series data of random and seasonal factors is proposed for the comparative trend analyses of both the battery internal temperature and the battery installation chamber temperature. The objective is to apply predictive fault diagnosis to detect any undesirable increase in battery temperature using prior indicators of heat dissipation process failure¿to avoid the development of the most frequent and dangerous failure modes of VRLA batteries such as dry out and thermal runaway. It is concluded that these failure modes can be conveniently diagnosed by easily recognized patterns, obtained by performing comparative trend analyses to the variables measured onboard by NMEA sensors.García Moreno, E.; Quiles Cucarella, E.; Correcher Salvador, A.; Morant Anglada, FJ. (2019). Marine NMEA 2000 Smart Sensors for Ship Batteries Supervision and Predictive Fault Diagnosis. Sensors. 19(20):1-24. https://doi.org/10.3390/s19204480S1241920Dudojc, B., & Mindykowski, J. (2019). New Approach to Analysis of Selected Measurement and Monitoring Systems Solutions in Ship Technology. Sensors, 19(8), 1775. doi:10.3390/s19081775Khan, M., Swierczynski, M., & Kær, S. (2017). Towards an Ultimate Battery Thermal Management System: A Review. Batteries, 3(4), 9. doi:10.3390/batteries3010009IEEE P1451.6—Proposed Standard for a High-Speed CANopen- Based Transducer Network Interface for Intrinsically Safe and Non-Intrinsically Safe Applications http://grouper.ieee.org/groups/1451/6/Song, E., & Lee, K. (2008). Understanding IEEE 1451-Networked smart transducer interface standard - What is a smart transducer? IEEE Instrumentation & Measurement Magazine, 11(2), 11-17. doi:10.1109/mim.2008.4483728Signal K Signalk.org/overview.htmlLead Acid Battery Working–Lifetime Study http://www.power-thru.com/documents/The%20Truth%20About%20Batteries%20-%20POWERTHRU%20White%20Paper.pdfLee, C.-Y., Peng, H.-C., Lee, S.-J., Hung, I.-M., Hsieh, C.-T., Chiou, C.-S., … Huang, Y.-P. (2015). A Flexible Three-in-One Microsensor for Real-Time Monitoring of Internal Temperature, Voltage and Current of Lithium Batteries. Sensors, 15(5), 11485-11498. doi:10.3390/s150511485Hong, J., Wang, Z., & Liu, P. (2017). Big-Data-Based Thermal Runaway Prognosis of Battery Systems for Electric Vehicles. Energies, 10(7), 919. doi:10.3390/en10070919Jouhara, H., Khordehgah, N., Serey, N., Almahmoud, S., Lester, S. P., Machen, D., & Wrobel, L. (2019). Applications and thermal management of rechargeable batteries for industrial applications. Energy, 170, 849-861. doi:10.1016/j.energy.2018.12.218Salameh, Z. M., Casacca, M. 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Journal of Power Sources, 196(15), 6007-6014. doi:10.1016/j.jpowsour.2011.03.101Cho, S., Jeong, H., Han, C., Jin, S., Lim, J. H., & Oh, J. (2012). State-of-charge estimation for lithium-ion batteries under various operating conditions using an equivalent circuit model. Computers & Chemical Engineering, 41, 1-9. doi:10.1016/j.compchemeng.2012.02.003Xu, J., Wang, J., Li, S., & Cao, B. (2016). A Method to Simultaneously Detect the Current Sensor Fault and Estimate the State of Energy for Batteries in Electric Vehicles. Sensors, 16(8), 1328. doi:10.3390/s16081328Osaka, T., Momma, T., Mukoyama, D., & Nara, H. (2012). Proposal of novel equivalent circuit for electrochemical impedance analysis of commercially available lithium ion battery. Journal of Power Sources, 205, 483-486. doi:10.1016/j.jpowsour.2012.01.070Guenther, C., Barillas, J. K., Stumpp, S., & Danzer, M. A. (2012). A dynamic battery model for simulation of battery-to-grid applications. 2012 3rd IEEE PES Innovative Smart Grid Technologies Europe (ISGT Europe). doi:10.1109/isgteurope.2012.6465855Worwood, D., Kellner, Q., Wojtala, M., Widanage, W. D., McGlen, R., Greenwood, D., & Marco, J. (2017). A new approach to the internal thermal management of cylindrical battery cells for automotive applications. Journal of Power Sources, 346, 151-166. doi:10.1016/j.jpowsour.2017.02.023Barré, A., Deguilhem, B., Grolleau, S., Gérard, M., Suard, F., & Riu, D. (2013). A review on lithium-ion battery ageing mechanisms and estimations for automotive applications. Journal of Power Sources, 241, 680-689. doi:10.1016/j.jpowsour.2013.05.040Modelisation du Vieillissement et Determination de l’Etat de Sante de Batteries Lithium-Ion pour Application Vehicule Electrique et Hybride https://tel.archives-ouvertes.fr/tel-00957678Vetter, J., Novák, P., Wagner, M. R., Veit, C., Möller, K.-C., Besenhard, J. O., … Hammouche, A. 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(2013). Parametrisation of the influence of different cycling conditions on the capacity fade and the internal resistance increase for lithium nickel manganese cobalt oxide/graphite cells. Journal of Electroanalytical Chemistry, 707, 110-116. doi:10.1016/j.jelechem.2013.08.032Goebel, K., Saha, B., Saxena, A., Celaya, J., & Christophersen, J. (2008). Prognostics in Battery Health Management. IEEE Instrumentation & Measurement Magazine, 11(4), 33-40. doi:10.1109/mim.2008.4579269Nuhic, A., Terzimehic, T., Soczka-Guth, T., Buchholz, M., & Dietmayer, K. (2013). Health diagnosis and remaining useful life prognostics of lithium-ion batteries using data-driven methods. Journal of Power Sources, 239, 680-688. doi:10.1016/j.jpowsour.2012.11.146Zou, Y., Hu, X., Ma, H., & Li, S. E. (2015). Combined State of Charge and State of Health estimation over lithium-ion battery cell cycle lifespan for electric vehicles. 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Revision 1.5 https://www.maretron.com/support/manuals/NBE100UM_1.0.htmlOneNet https://www.nmea.org/content/STANDARDS/OneNetMaretron Press Kit https://www.maretron.com/company/presskit.phpDCM100 User’s Manual https://www.maretron.com/support/manuals/DCM100UM_1.5.htmlAirmar Technology Corporation www.airmar.comGarcía, E., Quiles, E., Correcher, A., & Morant, F. (2018). Sensor Buoy System for Monitoring Renewable Marine Energy Resources. 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    The Joint Center for Energy Storage Research: A New Paradigm for Battery Research and Development

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    The Joint Center for Energy Storage Research (JCESR) seeks transformational change in transportation and the electricity grid driven by next generation high performance, low cost electricity storage. To pursue this transformative vision JCESR introduces a new paradigm for battery research: integrating discovery science, battery design, research prototyping and manufacturing collaboration in a single highly interactive organization. This new paradigm will accelerate the pace of discovery and innovation and reduce the time from conceptualization to commercialization. JCESR applies its new paradigm exclusively to beyond-lithium-ion batteries, a vast, rich and largely unexplored frontier. This review presents JCESR's motivation, vision, mission, intended outcomes or legacies and first year accomplishments.Comment: 17 pages, 14 figures, 96 reference

    Magnetospheric space plasma investigations

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    The topics addressed are: (1) generalized semikinetic models; (2) collision-collisionless transition model; (3) observation of O+ outflows; (4) equatorial transitions; (5) inner plasmasphere-ionosphere coupling; (6) plasma wave physical processes; (7) ULF wave ray-tracing; and (8) nighttime anomalous electron heating events

    Origins of the Ambient Solar Wind: Implications for Space Weather

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    The Sun's outer atmosphere is heated to temperatures of millions of degrees, and solar plasma flows out into interplanetary space at supersonic speeds. This paper reviews our current understanding of these interrelated problems: coronal heating and the acceleration of the ambient solar wind. We also discuss where the community stands in its ability to forecast how variations in the solar wind (i.e., fast and slow wind streams) impact the Earth. Although the last few decades have seen significant progress in observations and modeling, we still do not have a complete understanding of the relevant physical processes, nor do we have a quantitatively precise census of which coronal structures contribute to specific types of solar wind. Fast streams are known to be connected to the central regions of large coronal holes. Slow streams, however, appear to come from a wide range of sources, including streamers, pseudostreamers, coronal loops, active regions, and coronal hole boundaries. Complicating our understanding even more is the fact that processes such as turbulence, stream-stream interactions, and Coulomb collisions can make it difficult to unambiguously map a parcel measured at 1 AU back down to its coronal source. We also review recent progress -- in theoretical modeling, observational data analysis, and forecasting techniques that sit at the interface between data and theory -- that gives us hope that the above problems are indeed solvable.Comment: Accepted for publication in Space Science Reviews. Special issue connected with a 2016 ISSI workshop on "The Scientific Foundations of Space Weather." 44 pages, 9 figure

    Chemistry in Dense Molecular Clouds: Theory and Observational Constraints

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    For the most part, gas phase models of the chemistry of dense molecular clouds predict the abundances of simple species rather well. However, for larger molecules and even for small systems rich in carbon these models often fail spectacularly. We present a brief review of the basic assumptions and results of large scale modeling of the chemistry in dense molecular clouds. Particular attention will be paid to the influence of the gas phase ratios of the major elements in molecular clouds, and the likely role grains play in maintaining these ratios as clouds evolve from initially diffuse objects to denser cores with associated stellar and planetary formation. Recent spectral line surveys at centimeter and millimeter wavelengths along with selected observations in the submillimeter have now produced an accurate "inventory" of the gas phase elemental budgets in different types of molecular clouds, though gaps in our knowledge clearly remain. The constraints these observations place on theoretical models of interstellar chemistry can be used to gain insights into why the models fail, and show also which neglected processes must be included in more complete analyses. Looking toward the future, truly protostellar regions are only now becoming available for both experimental and theoretical study, and some of the expected modifications of molecular cloud chemistry in these sources are therefore outlined

    Thermal photons and dileptons

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    We discuss the status of a subset of penetrating probes in relativistic nuclear collisions. Thermal photons and dileptons are considered, as well as the electromagnetic signature of jets.Comment: Talk presented at the 18th International Conference on Ultrarelativistic Nucleus-Nucleus Collisions, Quark Matter 2005, Budapest, Hungary, 4-9 Auguest 200

    Carbon Chemistry in Dense Molecular Clouds: Theory and Observational Constraints

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    For the most part, gas phase models of the chemistry of dense molecular clouds predict the abundances of simple species rather well. However, for larger molecules and even for small systems rich in carbon these models often fail spectacularly. We present a brief review of the basic assumptions and results of large scale modeling of the carbon chemistry in dense molecular clouds. Particular attention will be paid to the influence of the gas phase C/O ratio in molecular clouds, and the likely role grains play in maintaining this ratio as clouds evolve from initially diffuse objects to denser cores with associated stellar and planetary formation. Recent spectral line surveys at centimeter and millimeter wavelengths along with selected observations in the submillimeter have now produced an accurate "inventory" of the gas phase carbon budget in several different types of molecular clouds, though gaps in our knowledge clearly remain. The constraints these observations place on theoretical models of interstellar chemistry can be used to gain insights into why the models fail, and show also which neglected processes must be included in more complete analyses. Looking toward the future, larger molecules are especially difficult to study both experimentally and theoretically in such dense, cold regions, and some new methods are therefore outlined which may ultimately push the detectability of small carbon chains and rings to much heavier species
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