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KlimaCH4. Climate effects of biomethane economy; KlimaCH4. Klimaeffekte von Biomethan

Abstract

Within the project ''Climate effects of biomethane economy'' (KlimaCH4) of the German Biomass Research Centre two methods for measurement of direct greenhouse gas emissions were analyzed for their applicability and comparability. In the context of concrete measurements direct emissions, mainly of methane, three biogas plants with methane treatment for feeding into the natural gas grid were quantified. These tests were carried out on the one hand directly on-site by using leak detection, enclosures and ''open chamber'' measurements, but also indirectly by optical remote sensing with tunable diode laser absorption spectrometry (TDLAS) and reverse dispersion modelling by inverse dispersion modeling. The on-site method offers the possibility, to investigate the influences of plant operation on emissions of known diffuse sources, inter alia, through the balance of the operating status with the timeline of a specific emission source (e.g. as increased release of methane due to stirring intervals). This is particularly useful for deriving appropriate measures to reduce emissions. The quantification of individual, diffuse emission sources is metrologically possibly only very costly to implement. The effort is depending to a considerable extent by the design and the size of the examined biogas plant. In order to detect the influence seasonal changing of environmental  More>>
Publication Date:
Jul 01, 2014
Product Type:
Technical Report
Report Number:
DBFZ-20
Subject:
09 BIOMASS FUELS; BIOFUELS; BIOMASS CONVERSION PLANTS; EMISSION; ENVIRONMENTAL EFFECTS; LASER SPECTROSCOPY; MEASURING METHODS; METHANE; TELEMETRY
Sponsoring Organizations:
Bundesminsterium fuer Ernaehrung und Landwirtschaft, Berlin (Germany)
OSTI ID:
22505783
Research Organizations:
DBFZ Deutsches Biomasseforschungszentrum gemeinnuetzige GmbH, Leipzig (Germany)
Country of Origin:
Germany
Language:
German
Contract Number:
Foerderkennzeichen BMEL 22009310; Foerderkennzeichen BMEL 10NR093
Other Identifying Numbers:
Other: ISSN 2197-4632; TRN: DE16F2047076340
Availability:
Available from: https://www.dbfz.de/fileadmin/user_upload/DBFZ_Reports/DBFZ_Report_20.pdf
Submitting Site:
DE
Size:
183 page(s)
Announcement Date:
Aug 11, 2016

Citation Formats

Westerkamp, Tanja, Reinelt, Torsten, Oehmichen, Katja, Ponitka, Jens, and Naumann, Karin. KlimaCH4. Climate effects of biomethane economy; KlimaCH4. Klimaeffekte von Biomethan. Germany: N. p., 2014. Web.
Westerkamp, Tanja, Reinelt, Torsten, Oehmichen, Katja, Ponitka, Jens, & Naumann, Karin. KlimaCH4. Climate effects of biomethane economy; KlimaCH4. Klimaeffekte von Biomethan. Germany.
Westerkamp, Tanja, Reinelt, Torsten, Oehmichen, Katja, Ponitka, Jens, and Naumann, Karin. 2014. "KlimaCH4. Climate effects of biomethane economy; KlimaCH4. Klimaeffekte von Biomethan." Germany.
@misc{etde_22505783,
title = {KlimaCH4. Climate effects of biomethane economy; KlimaCH4. Klimaeffekte von Biomethan}
author = {Westerkamp, Tanja, Reinelt, Torsten, Oehmichen, Katja, Ponitka, Jens, and Naumann, Karin}
abstractNote = {Within the project ''Climate effects of biomethane economy'' (KlimaCH4) of the German Biomass Research Centre two methods for measurement of direct greenhouse gas emissions were analyzed for their applicability and comparability. In the context of concrete measurements direct emissions, mainly of methane, three biogas plants with methane treatment for feeding into the natural gas grid were quantified. These tests were carried out on the one hand directly on-site by using leak detection, enclosures and ''open chamber'' measurements, but also indirectly by optical remote sensing with tunable diode laser absorption spectrometry (TDLAS) and reverse dispersion modelling by inverse dispersion modeling. The on-site method offers the possibility, to investigate the influences of plant operation on emissions of known diffuse sources, inter alia, through the balance of the operating status with the timeline of a specific emission source (e.g. as increased release of methane due to stirring intervals). This is particularly useful for deriving appropriate measures to reduce emissions. The quantification of individual, diffuse emission sources is metrologically possibly only very costly to implement. The effort is depending to a considerable extent by the design and the size of the examined biogas plant. In order to detect the influence seasonal changing of environmental conditions recurring emission measurements were realized. The use of optical telemetry showed as an advantageous alternative to on-site method, because it can significantly reduce time required for emission measurements particularly at large biogas plants or plants with numerous individual sources. With only one measurement sequence all emission sources are covered, without consuming individual measurements. In addition, in comparision to the on-site method, the emission situation of the entire system can be better reproduced, since all individual sources are included in the identical period. In addition, with the optical remote measurement method one can from the time profile of the path-averaged concentrations in comparison with plant operation infer possible causes of increased emissions. This is mainly the case with operating problems with correspondingly high emissions. [German] Im Rahmen des Projektes ''Klimaeffekte einer Biomethanwirtschaft'' (KlimaCH4) wurden durch das Deutsche Biomasseforschungszentrum zwei Methoden fuer Messungen von direkten Treibhausgasemissionen hinsichtlich ihrer Anwendbarkeit und Vergleichbarkeit untersucht. Im Rahmen konkreter Messungen wurden die direkten Emissionen, v. a. von Methan, an drei Biogasanlagen mit Methanaufbereitung zur Einspeisung ins Erdgasnetz quantifiziert. Diese Untersuchungen erfolgten einerseits direkt vor Ort mittels Leckagesuche, Einhausungen und ''Open Chamber''-Messungen, andererseits indirekt mittels optischer Fernmessungen mit Tunable Diode Laser Absorption Spectrometry (TDLAS) und Quelltermrueckrechnung mittels inverser Ausbreitungsmodellierung. Die Vor-Ort-Methode bietet dabei die Moeglichkeit, die Einfluesse des Anlagenbetriebs auf die Emissionen bekannter diffuser Quellen zu untersuchen, u. a. durch den Abgleich des Betriebszustandes mit dem zeitlichem Verlauf der Emission einer bestimmten Quelle (z.B. erhoehte Methanfreisetzung aufgrund von Ruehrintervallen). Dies ist insbesondere fuer die Ableitung geeigneter Emissionsminderungsmassnahmen von zentraler Bedeutung. Die Quantifizierung einzelner, diffuser Emissionsquellen ist messtechnisch gegebenenfalls nur sehr aufwendig umsetzbar. Der Aufwand ist in erheblichem Masse von der Bauweise und Groesse der zu untersuchenden Biogasanlage abhaengig. Um den Einfluss jahreszeitlich wechselnder Umgebungsbedingungen zu erfassen wurden wiederkehrende Emissionsmessungen realisiert. Der Einsatz optischer Fernmesstechnik stellte sich als vorteilhafte Alternative zur Vor-Ort-Methode dar, da er insbesondere an grossen Biogasanlagen bzw. Anlagen mit zahlreichen Einzelquellen den Zeitaufwand fuer die Emissionsmessungen erheblich reduzieren kann. Mit nur einem Messdurchgang koennen alle Emissionsquellen erfasst werden, ohne aufwendige Einzelmessungen. Zudem wird im Vergleich zur Vor-Ort-Methode die Emissionssituation der Gesamtanlage besser wiedergegeben, da alle Einzelquellen im identischen Zeitraum erfasst werden. Zudem kann mit der optischen Fernmessmethode aus dem zeitlichen Verlauf der pfadgemittelten Konzentrationen im Abgleich mit dem Anlagenbetrieb auf moegliche Ursachen fuer erhoehte Emissionen geschlossen werden. Dies ist vorwiegend bei Betriebsstoerungen mit entsprechend hohen Emissionen der Fall.}
place = {Germany}
year = {2014}
month = {Jul}
}