Change search
Refine search result
1 - 13 of 13
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Rows per page
  • 5
  • 10
  • 20
  • 50
  • 100
  • 250
Sort
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
Select
The maximal number of hits you can export is 250. When you want to export more records please use the Create feeds function.
  • 1.
    Arrhenius, Karine
    et al.
    RISE - Research Institutes of Sweden, Bioscience and Materials, Chemistry and Materials.
    Fischer, Andreas
    RISE - Research Institutes of Sweden, Bioscience and Materials, Chemistry and Materials.
    Büker, Oliver
    RISE - Research Institutes of Sweden, Safety and Transport, Measurement Science and Technology.
    Methods for sampling biogas and biomethane on adsorbent tubes after collection in gas bags2019In: Applied Sciences, E-ISSN 2076-3417, Vol. 9, no 6, article id 1171Article in journal (Refereed)
    Abstract [en]

    Biogas is a renewable energy source with many different production pathways and numerous excellent opportunities for use; for example, as vehicle fuel after upgrading (biomethane). Reliable analytical methodologies for assessing the quality of the gas are critical for ensuring that the gas can be used technically and safely. An essential part of any procedure aimed at determining the quality is the sampling and transfer to the laboratory. Sampling bags and sorbent tubes are widely used for collecting biogas. In this study, we have combined these two methods, i.e., sampling in a gas bag before subsequent sampling onto tubes in order to demonstrate that this alternative can help eliminate the disadvantages associated with the two methods whilst combining their advantages; with expected longer storage stability as well as easier sampling and transport. The results of the study show that two parameters need to be taken into account when transferring gas from a bag on to an adsorbent; the water content of the gas and the flow rate used during transfer of the gas on to the adsorbent. © 2019 by the authors.

  • 2.
    Arrhenius, Karine
    et al.
    RISE - Research Institutes of Sweden, Bioscience and Materials, Chemistry and Materials.
    Karlsson, Anders
    RISE - Research Institutes of Sweden, Bioscience and Materials, Chemistry and Materials.
    Hakonen, Aron
    Ohlson, Lars
    Fordonsgas Sverige AB, Sweden.
    Yaghooby, Haleh
    RISE - Research Institutes of Sweden, Bioscience and Materials, Chemistry and Materials.
    Büker, Oliver
    RISE - Research Institutes of Sweden, Safety and Transport, Measurement Science and Technology.
    Variations of fuel composition during storage at Liquefied Natural Gas refuelling stations2018In: Journal of Natural Gas Science and Engineering, ISSN 1875-5100, E-ISSN 2212-3865, Vol. 49, p. 317-323Article in journal (Refereed)
    Abstract [en]

    Liquefied Natural Gas (LNG) and Liquefied Biogas (LBG) utilization within the heavy duty transport sector is today a sustainable alternative to the use of oil. However, in spite of the high degree of insulation in the storage tank walls, it is impossible to fully avoid any net heat input from the surroundings. Due to some degree of vaporization this results in variation in gas composition during storage at refuelling stations, potentially leading to engine failures. Within this study, a vaporizer/sampler has been built and tested at a station delivering liquefied biomethane (LBG) and occasionally; such in this case, LNG to heavy and medium duty trucks. The vaporizer/sampler has then been used to study the variation of the LNG composition in the storage tank during a two weeks period. The results clearly underline a correlation between the gas phase and the liquid phase as the concentration changes follow the same trend in both phases. Two opposite effects are assumed to influence the concentration of methane, ethane and propane in the liquid and in the gas phase. On one hand, because of the probable presence of not fully mixed layers in the storage tank and due to vehicles being refuelled, both liquid and gas phases are enriched in methane at the expense of ethane and propane. On the other hand, due to boil-off effect towards the end of the storage period, both liquid and gas phases are enriched in ethane and propane at the expense of methane.

  • 3.
    Arrhenius, Karine
    et al.
    RISE - Research Institutes of Sweden, Bioscience and Materials, Chemistry and Materials.
    Yaghooby, Haleh
    RISE - Research Institutes of Sweden, Bioscience and Materials, Chemistry and Materials.
    Rosell, Lars
    RISE - Research Institutes of Sweden, Bioscience and Materials, Chemistry and Materials.
    Büker, Oliver
    RISE - Research Institutes of Sweden, Bioscience and Materials, Chemistry and Materials.
    Culleton, Lucy
    NPL National Physical Laboratory, UK.
    Bartlett, Sam
    NPL National Physical Laboratory, UK.
    Murugan, Arul
    NPL National Physical Laboratory, UK.
    Brewer, Paul
    NPL National Physical Laboratory, UK.
    Li, Jianrong
    VSL Van Swinden Laboratorium B.V., The Netherlands.
    van der Veen, Adriaan M. H.
    VSL Van Swinden Laboratorium B.V., The Netherlands.
    Krom, Iris
    VSL Van Swinden Laboratorium B.V., The Netherlands.
    Lestremau, Francoise
    INERIS Institut national de l'environnement industriel et des risques, France.
    Beranek, Jan
    ČMI Česky metrologicky institut, Czech Republic.
    Suitability of vessels and adsorbents for the short-term storage of biogas/biomethane for the determination of impurities – Siloxanes, sulfur compounds, halogenated hydrocarbons, BTEX2017In: Biomass and Bioenergy, ISSN 0961-9534, E-ISSN 1873-2909, Vol. 105, p. 127-135Article in journal (Refereed)
    Abstract [en]

    Biogas is a renewable energy source with many different production pathways and various excellent opportunities to use, for example as vehicle fuel (biomethane). Reliable analytical methodologies for assessing the quality of the gas are critical to ensure that the gas can technically and safely be used. An essential part of any procedure aiming to determine the quality is the sampling and the transfer to the laboratory. One of the greatest challenges is then to ensure that the composition of the sample collected does not change between the time of sampling and the analysis. The choice of the sampling vessel to be used must be made only after fully assessing its short-term stability. In this paper, the results from short-term stability studies in different vessels (cylinders, bags and sorbents) are presented for siloxanes, BTEX, halogenated hydrocarbons and sulfur compounds. Storage of dry gas at high pressure (> 6 MPa) appears to be a good alternative however it is currently challenging to find an optimal treatment of the cylinders for all species to be assessed in biogas/biomethane. At lower pressure, adsorption effects on the inner surface of the cylinders have been observed. The use of bags and sorbent tubes also shows limitation. No existing sorbent tubes are sufficiently universal as to trap all possible impurities and high boiling compounds may adsorbed on the inner surface of the bags walls. Moreover, the presence of water when storing biogas most certainly impacts the storage stability of compounds in most vessels. Using at least two sampling methods for a given compound and comparing results will allow taking into account the eventual effects of water vapour, and adsorption on the inner surface of the vessels.

  • 4.
    Büker, Oliver
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Volym, flöde, temperatur o densitet.
    Abhängigkeit von der Positionierung: Zur Problematik der Strömungsabhängigkeit von Durchflussensoren (Dependence on the positioning2012In: Euroheat and Power/Fernwärme International, Vol. 41, no 4, p. 60-67Article in journal (Other academic)
  • 5.
    Büker, Oliver
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Volym, flöde, temperatur o densitet.
    Calibration of an ultrasonic flow meter for hot water2013In: Flow Measurement and Instrumentation, Vol. 30, p. 166-173Article in journal (Refereed)
  • 6.
    Büker, Oliver
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Volym, flöde, temperatur o densitet.
    Reynolds number dependence of an orifice plate2013In: Flow Measurement and Instrumentation, Vol. 30, p. 123-32Article in journal (Other academic)
  • 7.
    Büker, Oliver
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Volym, flöde, temperatur o densitet.
    Vergleichsmessungen zwischen Durchfluss-Normalmessanlagen (Comparison Measurements of Flow Standard Test Facilities)2012In:  Technisches Messen, Vol. 79, no 5, p. 282-289Article in journal (Other academic)
  • 8.
    Büker, Oliver
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Volym, flöde, temperatur o densitet.
    Lau, Peter
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Volym, flöde, temperatur o densitet.
    An ultra high-pressure test rig for measurements of small flow rates with different viscosities2014In: Flow Measurement and Instrumentation, Vol. 40, p. 82-90Article in journal (Other academic)
  • 9.
    Büker, Oliver
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Volym, flöde, temperatur o densitet.
    Lau, Peter
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Volym, flöde, temperatur o densitet.
    Tawackolian, Karsten
    Reynolds number dependence of an orifice plate2013In: Flow Measurement and instrumentation., Vol. 30, p. 123-132Article in journal (Refereed)
  • 10.
    Büker, Oliver
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Volym, flöde, temperatur o densitet.
    Lederer, Thomas
    Tawackolian, Karsten
    Hogendoorn, J
    Investigation of a 10-path Ultrasonic Flow Meter for Accurate Feedwater Measurement.2014In: Measurement Science and Technology, Vol. 25, no 7, p. 75304-Article in journal (Other academic)
  • 11.
    De Huu, Marc A.
    et al.
    METAS Federal Institute of Metrology, Switzerland.
    Büker, Oliver
    RISE - Research Institutes of Sweden, Safety and Transport, Measurement Science and Technology.
    Christensen, R.
    FORCE Technology, Denmark.
    Macdonald, Marc
    NEL, UK.
    Maury, René C.
    CESAME-EXADEBIT SA, France.
    Schrade, M.
    Justervesenet, Norway.
    Petter, Harm Tido
    VSL, The Netherlands.
    Stadelmann, P.
    Empa, Switzerland.
    The European Research Project on Metrology for Hydrogen Vehicles - MetroHyVe2018In: Journal of Physics: Conference Series, Institute of Physics Publishing , 2018, Vol. 1065, no 9, article id 092017Conference paper (Refereed)
    Abstract [en]

    A large hydrogen infrastructure is currently in development across Europe. However, the industry faces the dilemma that they are required to meet certain measurement requirements set by European legislation that cannot currently be followed due to the lack of available methods and standards. The EMPIR Metrology for Hydrogen Vehicles project will be the first large scale project of its kind that will tackle the four measurement challenges that currently prevent the industry from meeting requirements set by International Standards such as flow metering, quality control, quality assurance and sampling. This paper presents a brief overview of the specific objectives of the project and focuses on the flow metering work package and the presentation of its planned tasks, which comprise laboratory and measurements in the field. Laboratory work will assess the use of substitute fluids to hydrogen to provide a safer and more cost effective method for the type approval of Hydrogen Refuelling Stations (HRS). To be able to link laboratory work to field testing, mobile primary standards will be developed and the design of a field testing primary standard will be addressed. The aim is to inform what the European national metrology institutes are currently developing in the field of hydrogen flow metering and quality control of HRS.

  • 12.
    Hakonen, Aron
    et al.
    RISE - Research Institutes of Sweden. Sensor Visions AB, Sweden.
    Karlsson, Anders
    RISE - Research Institutes of Sweden, Bioscience and Materials, Chemistry and Materials.
    Lindman, Lena
    RISE - Research Institutes of Sweden, Bioscience and Materials, Chemistry and Materials.
    Büker, Oliver
    RISE - Research Institutes of Sweden, Bioscience and Materials, Chemistry and Materials.
    Arrhenius, Karine
    RISE - Research Institutes of Sweden, Bioscience and Materials, Chemistry and Materials.
    Particles in fuel-grade Liquefied Natural Gas2018In: Journal of Natural Gas Science and Engineering, ISSN 1875-5100, E-ISSN 2212-3865, Vol. 55, p. 350-353Article in journal (Refereed)
    Abstract [en]

    The utilization of Liquefied Natural Gas (LNG) in the heavy-duty transport sector is a convenient and cost-effective step towards a sustainable future. However, there are questions regarding LNG fuel quality and destructive particles for engines. Basically nothing is known about particles in the commercial LNG being fueled today. The gravimetric and SEM-EDX results here demonstrates that there are precarious metal and silicon dioxide particles in fuel-grade LNG that can clog and erode engine parts. Considering these results further research in the direction of this study, including standardized method development, is highly motivated.

  • 13.
    Tawackolian, K.
    et al.
    PTB Physikalisch-Technische Bundesanstalt, Germany.
    Büker, Oliver
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Volym, flöde, temperatur o densitet.
    Hogendoorn, J.
    KROHNE Altometer, The Netherlands.
    Lederer, T.
    PTB Physikalisch-Technische Bundesanstalt, Germany.
    Investigation of a ten-path ultrasonic flow meter for accurate feedwater measurements2014In: Measurement science and technology, ISSN 0957-0233, E-ISSN 1361-6501, Vol. 25, no 7, p. 75304-Article in journal (Refereed)
    Abstract [en]

    The flow instruments used in thermal power plants cannot be calibrated directly for the actual process conditions, since no traceable calibration facility with known uncertainty is available. Asystematic investigation of the relevant influence parameters is therefore needed. It was found in earlier investigations that the dominant influences on the measurement uncertainty are the flowvelocity profile and the temperature. In the present work, we report on our experimental study of the temperature and Reynolds number dependence of a new ten-path ultrasonic flow meterprototype. An improved measuring program is developed that allows for a systematic characterization. Special emphasis was placed on producing and validating well defined velocity profiles on aprecision calibration flow rig. It was also for the first time intended and validated to generate fully developed Reynolds-similar velocity profiles for different temperatures so that the two main influence parameters, namely temperature and Reynolds number, can be clearly characterized separately. Since such ideal measurement conditions are not found in practical applications, the approach is also tested for a disturbed flow condition. A well defined disturbance is generated with a new flow disturber.

1 - 13 of 13
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
v. 2.35.7