Relevant bibliographies by topics / Stefan, Verena

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Stefan, Verena'

Author: Grafiati
Published: 4 June 2021
Last updated: 15 February 2022

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Journal articles on the topic "Stefan, Verena"

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Schubert, Werner. "Ad Fontes. Europäisches Forum junger Rechtshistorikerinnen und Rechtshistoriker Wien 2001, hg. v. Birgit Feldner/Verena Tiziana Halbwachs/Thomas Olechowski/Josef Pauser/Stefan Schima/Andreas Sereinig." Zeitschrift der Savigny-Stiftung für Rechtsgeschichte: Germanistische Abteilung 121, no. 1 (August 1, 2004): 550–51. http://dx.doi.org/10.7767/zrgga.2004.121.1.550.

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Arvisais, Alexandra. "Andrea Oberhuber, avec des accompagnements de Catherine Mavrikakis, Nicole Brossard et Verena Stefan, Corps de papier. Résonances, Québec, Nota bene, coll. « Nouveaux essais Spirale », 2012, 238 p." Recherches féministes 27, no. 1 (2014): 261. http://dx.doi.org/10.7202/1025427ar.

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Trujillo, Stefania. "Ressenya a Bellomi P., Colombini F. e Neri S. (eds.) (2011-2012). Progetto Mambrino, Ciclo italiano di Amadis di Gaula. Collezione della Biblioteca Civica di Verona , Verona, QuiEdit, 2012." SCRIPTA. Revista Internacional de Literatura i Cultura Medieval i Moderna 2, no. 2 (December 17, 2013): 368. http://dx.doi.org/10.7203/scripta.2.3119.

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Ressenya a Paola Bellomi, Federica Colombini e Stefano Neri (Eds.), Progetto Mambrino, Ciclo italiano di Amadis di Gaula. Collezione della Biblioteca Civica di Verona. Edizione fotodigitale. Studi preliminari di Anna Bognolo e Paola Bellomi. Prefazione di Agostino Contò. Verona, QuiEdit, 2012.. ISBN: 978-88-6464-130-0
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Moench, Esther. "Stefano da Verona: la quete d'une double paternite." Zeitschrift für Kunstgeschichte 49, no. 2 (1986): 220. http://dx.doi.org/10.2307/1482316.

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de Vaan, M. "SCHUMACHER, STEFAN UND MATZINGER, JOACHIM: Die Verben des Altalbanischen." Kratylos 60, no. 1 (2015): 1–17. http://dx.doi.org/10.29091/kratylos/2015/1/1.

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Van Tricht, Filip. "Latin Emperors and Serbian Queens: Anna and Helena." Frankokratia 1, no. 1-2 (March 16, 2020): 56–107. http://dx.doi.org/10.1163/25895931-12340002.

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Abstract Latin Constantinople in the 1240s and 1250s has often been considered a ripe fruit waiting to fall into the hands of one of the competing political entities in the region (Nicaea, Epiros, Bulgaria, etc.). This paper argues, on the contrary, that under Emperor Baldwin II (1240-1273) the Latin Empire remained a dynamic power in the post-1204 Byzantine world. The basis for this re-evaluation is a revisionist study of the genealogical relations between a number of leading families in the region (among others the Villehardouin, Da Verona, and Cayeux), creating networks both within Latin Romania and beyond. One of the main hypotheses advanced is that two Serbian queens – Stefan Nemanja’s third wife Anna (of Hainaut) and Stefan Uroš I’s wife Helena (Angelos/Courtenay) – were in fact what one might call Latin imperial princesses. This in turn leads to a reconsideration of Latin-Serbian relations in the period 1204-1261.
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Leal, Joanne. "THE POLITICS OF ‘INNERLICHKEIT’: KARIN STRUCK'S KLASSENLIEBE AND VERENA STEFAN'S HÄUTUNGEN." German Life and Letters 50, no. 4 (October 1997): 508–28. http://dx.doi.org/10.1111/j.1468-0483.1997.tb01708.x.

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Warner, Chantelle. "Speaking from experience: narrative schemas, deixis, and authenticity effects in Verena Stefan's feminist confession Shedding." Language and Literature: International Journal of Stylistics 18, no. 1 (February 2009): 7–23. http://dx.doi.org/10.1177/0963947008099303.

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Confessional writing, such as Swiss feminist Verena Stefan's autobiographical novel Shedding (1977) (German: Häutungen, 1977[1975]), is often praised as being an expression of a particular individual's authentic voice. This readerly concept of authentic voice has been under-examined in contemporary and postmodern narrative theories, which have tended to emphasize the abstractness, the disembodiedness of voice. In this article I draw from Monika Fludernik's concept of narrative schemas and from theories of deixis in literature within cognitive poetics in order to develop a model by which to explain the authenticity effects attributed to Stefan's book and to other works of testimonial and confessional literature. Through an analysis of stylistic features related to different aspects of deixis, I illustrate how deictic shifts may encourage readers to pay more attention to certain narrative parameters over others within the framework of familiar narrative schemas, thereby creating a greater sense of immersivity in the text and consequently the effect of a narrative that is being experienced even as it is being told.
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Even, Yael, and Evelyn Karet. "The Drawings of Stefano Da Verona and His Circle and the Origins of Collecting in Italy: A Catalogue Raisonné." Sixteenth Century Journal 35, no. 4 (December 1, 2004): 1118. http://dx.doi.org/10.2307/20477146.

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Ames-Lewis, Francis. "The Drawings of Stefano Da Verona and His Circle and the Origins of Collecting in Italy: A Catalogue Raisonné. Evelyn Karet." Speculum 80, no. 2 (April 2005): 599–601. http://dx.doi.org/10.1017/s0038713400000610.

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Dissertations / Theses on the topic "Stefan, Verena"

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Dargelies, Susanne. "Der Blick von Aussen und Innen : ein Werkvergleich von Verena Stefans Häutungen und Peter Handkes linkshändige Frau." Thesis, McGill University, 1991. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=61119.

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The present study is a comparison of two works of German language literature of the 70's, Verena Stefan's Hautungen and Peter Handke's die linkshandige Frau, which examines the background of both works, their themes, structure, style and language, as well as their interpretation of women's emancipation. A study of the literary background of the works will be undertaken, leading to a comparison of literary and social orientations reflected in the works. The central themes of both works will be examined in a parallel fashion to illuminate thematic similarities and differences. An interpretation of both works as women's literature and their emancipatory tendencies (conscious and unconscious) will be undertaken, to analyze the true extent of emancipatory tendencies in both works. Finally the genre, style and language of both works will be analysed, to define essential stylistic differences between the two works.
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Passerini, Verena [Verfasser], and Stefan [Akademischer Betreuer] Jentsch. "Aneuploidy triggers a conserved global response and impairs cellular homeostasis / Verena Passerini ; Betreuer: Stefan Jentsch." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2016. http://d-nb.info/1117473929/34.

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Mouris, Verena Fides [Verfasser], and Stefan [Akademischer Betreuer] Fichtner-Feigl. "Rolle der NK-Zellen bei chronisch entzündlichen Darmerkrankungen / Verena Fides Mouris. Betreuer: Stefan Fichtner-Feigl." Regensburg : Universitätsbibliothek Regensburg, 2013. http://d-nb.info/1054802505/34.

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Taschik, Julia [Verfasser], Paul-Gerhardt [Gutachter] Schlegel, Thomas [Gutachter] Haaf, Stefan [Gutachter] Knop, and Verena [Gutachter] Wiegering. "Zytokingenpolymorphismen bei Kindern mit akuter lymphatischer Leukämie / Julia Taschik. Gutachter: Paul-Gerhardt Schlegel ; Thomas Haaf ; Stefan Knop ; Verena Wiegering." Würzburg : Universität Würzburg, 2016. http://d-nb.info/1112041117/34.

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Rösch, Verena [Verfasser], Teja [Akademischer Betreuer] Tscharntke, Stefan [Akademischer Betreuer] Vidal, and Ingolf [Akademischer Betreuer] Steffan-Dewenter. "Landscape context of habitat fragmentation and the diversity of plants, arthropods and snails on calcareous grasslands / Verena Rösch. Gutachter: Stefan Vidal ; Ingolf Steffan-Dewenter. Betreuer: Teja Tscharntke." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2015. http://d-nb.info/1069664898/34.

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Hanfland, Verena [Verfasser], Günter [Akademischer Betreuer] Fürst, and Stefan [Akademischer Betreuer] Topp. "Die Embolisation von arteriellen Blutungen – Ergebnisse einer retrospektiven Studie an 82 Patienten / Verena Hanfland. Gutachter: Stefan Topp. Betreuer: Günter Fürst." Düsseldorf : Universitäts- und Landesbibliothek der Heinrich-Heine-Universität Düsseldorf, 2013. http://d-nb.info/1038050189/34.

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Ertl, Miriam Verena Manuela [Verfasser], Stephanie E. [Akademischer Betreuer] Combs, Stephanie E. [Gutachter] Combs, and Stefan [Gutachter] Burdach. "HOX genes in pathogenesis of Ewing sarcoma / Miriam Verena Manuela Ertl ; Gutachter: Stephanie E. Combs, Stefan Burdach ; Betreuer: Stephanie E. Combs." München : Universitätsbibliothek der TU München, 2018. http://d-nb.info/1170321402/34.

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Heimann, Stefan [Verfasser], Stephan [Akademischer Betreuer] Schulz, Matthias [Akademischer Betreuer] Epple, and Anja-Verena [Akademischer Betreuer] Mudring. "Thermoelektrische Materialien und Halbleiter : Vom metallorganischen Precursor zum nanoskaligen Material / Stefan Heimann. Gutachter: Matthias Epple ; Anja-Verena Mudring. Betreuer: Stephan Schulz." Duisburg, 2014. http://d-nb.info/1057837202/34.

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Ertl, Miriam Verena Manuela Verfasser], Stephanie [Akademischer Betreuer] [Combs, Stephanie E. [Gutachter] Combs, and Stefan [Gutachter] Burdach. "HOX genes in pathogenesis of Ewing sarcoma / Miriam Verena Manuela Ertl ; Gutachter: Stephanie E. Combs, Stefan Burdach ; Betreuer: Stephanie E. Combs." München : Universitätsbibliothek der TU München, 2018. http://nbn-resolving.de/urn:nbn:de:bvb:91-diss-20180829-1380365-1-1.

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Glassen, Thomas [Verfasser], Verena [Akademischer Betreuer] Nitsch, Verena [Gutachter] Nitsch, Timo von [Gutachter] Oertzen, and Stefan [Gutachter] Pickl. "Psychologisch orientierte Kategorisierung in der kognitiven Robotik mit dem Hierarchischen Dirichlet Prozess / Thomas Glassen ; Gutachter: Verena Nitsch, Timo von Oertzen, Stefan Pickl ; Akademischer Betreuer: Verena Nitsch ; Universität der Bundeswehr München, Fakultät für Luft- und Raumfahrttechnik." Neubiberg : Universitätsbibliothek der Universität der Bundeswehr München, 2018. http://d-nb.info/1169086152/34.

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Books on the topic "Stefan, Verena"

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Stefan, Verena. Shedding: And, Literally dreaming. New York: The Feminist Press, 1994.

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Karet, Evelyn. The drawings of Stefano da Verona and his circle and the origins of collecting in Italy: A catalogue raisonné. Philadelphia: American Philosophical Society, 2002.

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Hoffmeister, Cuno. Peremennye zvezdy. Moskva: Nauka, 1990.

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a cura di: Giorgio Bussolin e Stefano Zanus Fortes. 8 Magnificat a 3 voci dal ms. 759 della Biblioteca Capitolare di Verona (sec. XV), a cura di Giorgio Bussolin e Stefano Zanus Fortes. Edited by Giorgio Bussolin e Stefano Zanus Fortes. Bologna - Italia: Ut Orpheus, 2002.

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Europäische Stadt-Plätze: Genius und Geschichte : Rom, Pisa, Siena, Verona, Venedig, Brüssel, Bremen, Krakau, Prag, Dubrovnik, Salzburg, Madrid, Nancy, Paris, Lissabon, Dresden. Köln: DuMont Buchverlag, 1985.

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Stella, Busana Maria, Basso Patrizia, Tricomi Anna Rosa, and Pesavento Mattioli Stefania, eds. La lana nella Cisalpina romana: Economia e società : studi in onore di Stefania Pesavento Mattioli : atti del Convegno, Padova-Verona, 18-20 maggio 2011. Padova: Padova University Press, 2012.

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Teaford, Jon C. The twentieth-century American city. 2nd ed. Baltimore: Johns Hopkins University Press, 1993.

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The twentieth-century American city: Problem, promise, and reality. Baltimore: Johns Hopkins University Press, 1986.

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The urban millennium: The city-building process from the early Middle Ages to the present. Carbondale: Southern Illinois University Press, 1985.

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Husemann, Tim, Robert Korves, Frank Rosenkranz, Laura Schmitt, Litó Arnold, Judit Beke-Martos, Philipp Dördelmann, et al., eds. Strukturwandel und Privatrecht. Nomos Verlagsgesellschaft mbH & Co. KG, 2019. http://dx.doi.org/10.5771/9783845296791.

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Das Werk versammelt die Vorträge der 29. Jahrestagung der Gesellschaft Junge Zivilrechtswissenschaft e.V., die vom 5. bis 8. September 2018 an der Juristischen Fakultät der Ruhr-Universität Bochum stattgefunden hat. Das Generalthema „Strukturwandel und Privatrecht“ bot Anlass, darüber nachzudenken, wie Privatrecht auf den Wandel gesellschaftlicher Strukturen reagiert und wie die rechtlichen Strukturen selbst sich wandeln. Der Festvortrag eröffnete einen interdisziplinären Zugang zum Generalthema, das durch die 13 Fachvorträge von NachwuchswissenschaftlerInnen aus Deutschland, Österreich, der Schweiz und Liechtenstein konkretisiert wurde. Diese richteten ihren Fokus auf das allgemeine Privatrecht und das Gesellschaftsrecht, Arztrecht, Familienrecht, Stiftungsrecht und Zivilprozessrecht sowie die Digitalisierung. Die Themen reichten von Big-Data und Crowdfunding über das Autonome Fahren bis zur Musterfeststellungsklage. Mit Beiträgen von Dr. Franz-Josef Overbeck, Dr. Nadja Fabrizio, Dr. Stephan Seiwerth, LL.M. (Leuven), Mag. Dominic Gerstberger, Dr. Jonas David Brinkmann, Prof. Dr. Jens Prütting, LL.M. oec. (Köln), Dr. Stefan Klingbeil, LL.M. (Yale), Dr. Veronica Hoch, Thomas Sagstetter, Bianca Jessica Scraback, LL.B. (Bonn), Dr. Marie Herberger, LL.M. (Saabrücken), Ass. iur. Verena Kühnel, Ass.-Prof. Dr. Alexandra Butterstein, LL.M. (Vaduz), Dr. Lukas Beck
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Book chapters on the topic "Stefan, Verena"

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Rasper, Christiane. "Verena Stefan (* 1947)." In Frauenliebe Männerliebe, 409–13. Stuttgart: J.B. Metzler, 1997. http://dx.doi.org/10.1007/978-3-476-03666-7_91.

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Afken, Janin. "From Sisters’ Skin to Womb Ego: Temporality, Solidarity and Corporeality in Verena Stefan’s Shedding (1975)." In Sexual Culture in Germany in the 1970s, 119–38. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-27427-6_6.

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Hein, Rüdiger. "Einführung in die Ergebnisdarstellung und -diskussion mit Überblick zum Wirkungsmodell zur Arbeitsgestaltung von Social Entrepreneuren." In Typisch Social Entrepreneurship, 103–9. Wiesbaden: Springer Fachmedien Wiesbaden, 2021. http://dx.doi.org/10.1007/978-3-658-35145-8_4.

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ZusammenfassungIm Rahmen der Datenauswertung wurde untersucht, welche Kategorien sich aus den Interviews herausarbeiten lassen, die zur Beantwortung der zentralen Forschungsfrage führen, und inwieweit diese Kategorien in einer Systematik dargestellt werden können. Zur Beantwortung der zentralen Forschungsfrage konnten u. a. deutlich über 1.000 unterschiedliche Kodes nach der Reflexiven Grounded Theory herausgearbeitet und systematisch kategorisiert werden. Aus den dabei entwickelten Kategorien und der Art und Weise, wie die Kategorien zueinander in Verbindung stehen, setzt sich das in diesem Kapitel hergeleitete Wirkungsmodell zur Arbeitsgestaltung von Social Entrepreneuren (SE) zusammen, das alle Kategorien einbezieht und zu einem übergeordneten Ganzen vereint. Dieses Kapitel dient dazu, einen allgemeinen, einführenden Überblick zu dem Wirkungsmodell im Sinne einer Verständnisbasis zu schaffen.
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Oommen-Halbach, Anne, and Klaus Schepker. "„Denn im Verein stehen wir dem Nichts gegenüber“. Der Vorstand des Deutschen Vereins zur Fürsorge für jugendliche Psychopathen e. V. zwischen gescheiterter Überlebensstrategie und Resistenz (1933–1935)." In Kinder- und Jugendpsychiatrie im Nationalsozialismus und in der Nachkriegszeit, 225–52. Berlin, Heidelberg: Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-662-49806-4_5.

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"Stefan, Verena." In Who's Who in Lesbian and Gay Writing, 267–75. Routledge, 2003. http://dx.doi.org/10.4324/9780203402214-83.

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"Immediacy Eff ects: Deictic Shifts and Point of View in Verena Stefan’s Shedding, Peter Handke’s Hopeless Unhappiness, and." In The Pragmatics of Literary Testimony, 102–28. Routledge, 2012. http://dx.doi.org/10.4324/9780203098554-9.

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Velez, Pablo Cesar Ocampo, and Ricardo Prada-Ospina. "Bibliographic Analysis Between the Theory of the Supply Chain Orientation With Different Interactions in the Value Network of Small and Medium-Sized Enterprises." In Handbook of Research on Intrapreneurship and Organizational Sustainability in SMEs, 391–411. IGI Global, 2018. http://dx.doi.org/10.4018/978-1-5225-3543-0.ch018.

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The purpose of this chapter is to perform an analysis of the bibliographical references to describe the concept of supply chain orientation (SCO) as a fundamental construct of SMEs. The concept was developed by Defee et al. (2009), who extended the downstream perspective by the upstream perspective, including forward and reverse flows from the supplier to the customer and vice versa and proposed the concept of “closed loop supply chain orientation” (Esper, Defee, & Mentzer, 2010). The main scientific contributions developed by the most representative authors, such as Matsuno, Ken, & Mentzer (2000) and Tucker (2011), have been taken into account. A further research gap refers to the specific challenges facing family businesses and small and medium-sized enterprises (SMEs) within supply chains (Schulze-Ehlers, Steffen, Busch, & Spiller, 2014).
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Broeckmann, Andreas. "Image Machine." In Machine Art in the Twentieth Century. The MIT Press, 2017. http://dx.doi.org/10.7551/mitpress/9780262035064.003.0005.

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This chapter deals with the role that vision and images play in the conjunction of technics and aesthetics in the twentieth century. Based on an analysis of the fundamental technicity of human visual perception, it discusses the complicated notion of the “image” and that of the “medium” in art. The chapter begins with a detailed analysis of the concept of “operational images,” which pinpoints the tension between images that are produced to be seen by human eyes, and technical vision systems that are independent of human vision and human intervention. The author then presents artworks by artists including Nam June Paik, Steina Vasulka, and Julien Maire which articulate the complex aesthetics of visual media techniques. A discussion of early computer graphics artists like Vera Molnar, and more recent works by Antoine Schmitt, JODI, and others, exemplifies how issues like seriality, chance, and control have concerned visual artists working with different media supports ever since the 1920s. Finally, an analysis of works by David Rokeby, Wolfgang Staehle, and David Tomas serve to further outline the particular aesthetics of machine images and automated vision systems.
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Conference papers on the topic "Stefan, Verena"

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Kubiak, A., B. Luniewicz, and F. del Angel. "Flow Analysis Procedure for Steam Turbines." In ASME 1991 International Computers in Engineering Conference and Exposition. American Society of Mechanical Engineers, 1991. http://dx.doi.org/10.1115/cie1991-0080.

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Abstract An algorithm (computational procedure) for flow analysis of steam turbines is presented. The algorithm is specially designed for analysis of low pressure turbines but is applicable in the same way for high pressure turbines. The analysis of the flow is carried out stage by stage (or row by row). The algorithm is so designed that a turbine of known geometry can be assessed with respect to its throughput (flow) and performance capabilities at arbitrary flow rates and steam conditions. The performance parameters include stage efficiency, rotor blade loading, blade section efficiency, and all aero/thermodynamic parameters within the blade path. On the other hand the algorithm can be used for turbine design purposes. The algorithm deals with 2D flow. The analysis starts from the last stage and proceeds up-stream. There are several iteration loops where the mass flow is computed and compared to a required value. The algorithm is capable of determining stage flow given the stage pressure and vice versa. The algorithm can be expanded to assimilate new capabilities (for example: radial equilibrium applied to rotor). The algorithm can be applied especially for upgrading the turbines of older design.
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Kucukboyaci, Vefa N., Yixing Sung, Yiban Xu, Liping Cao, and Robert K. Salko. "VERA-CS Modeling and Simulation of PWR Main Steam Line Break Core Response to DNB." In 2016 24th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/icone24-60865.

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The Virtual Environment for Reactor Applications core simulator (VERA-CS) being developed by the Consortium for Advanced Simulation of Light Water Reactors (CASL) includes coupled neutronics, thermal-hydraulics (T/H), and fuel temperature components with an isotopic depletion capability. The neutronics capability is based on the Michigan Parallel Characteristics Transport Code (MPACT), a three-dimensional whole-core transport code. The T/H and fuel temperature models are provided by the COBRA-TF (CTF) subchannel code. As part of the CASL development program, the VERA-CS (MPACT/CTF) code system was applied to model and simulate reactor core response with respect to the departure from nucleate boiling (DNB) ratio at the most limiting point of a postulated pressurized water reactor main steam line break event initiated at the hot zero power, either with offsite power available and the reactor coolant pumps in operation (high-flow case) or without offsite power, where the reactor core is cooled through natural circulation (low-flow case). The VERA-CS simulation was based on core boundary conditions from the RETRAN-02 system transient calculations and STAR-CCM+ computational fluid dynamics (CFD) core inlet distribution calculations. The evaluation indicated that the VERA-CS code system is capable of modeling and simulating quasi-steady-state reactor core response under the main steam line break accident condition, the results are insensitive to uncertainties in the inlet flow distributions from the CFD simulations, and the high-flow case is more DNB limiting than the low-flow case.
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Okada, H., M. Igarashi, S. Yamamoto, O. Miyahara, A. Iseda, N. Komai, and F. Masuyama. "Long-Term Service Experience With Advanced Austenitic Alloys in Eddystone Power Station." In ASME 2007 Pressure Vessels and Piping Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/creep2007-26561.

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A service exposure test of advanced austenitic alloys was performed at Eddystone Power Station Unit 1. The alloys tested were TP347HFG, SUPER304H and HR3C as well as 17-14CuMo as a reference material. They were installed in the final super-heater section in 1991 and were removed in 2004. The service exposure duration is 75,075 h with the steam temperature and pressure estimated 615 °C and 35 MPa, respectively. Post exposure examination has proved no marked hot-corrosion and steam oxidation have occurred for the TP347HFG, SUPER304H and HR3C specimens, while severe hot-corrosion and exfoliation of steam-oxide films was pronounced in 17-14CuMo specimens. It is also found that HR3C exhibits the highest tensile strength with a lowest ductility and TP347HFG does vice versa, while the strength of SUPER304H is equivalent to that of 17-14CuMo with much better ductility. Short-term creep rupture strengths of these alloys have been reduced to some extent after the long-term service exposure and a longer-term creep rupture testing has been in progress. Microstructural evolution of the TP347HFG, SUPER304H and HR3C as well as 17-14CuMo during the long-term service exposure have been analyzed using a detailed TEM examination and the chemical analysis of extraction residue of the exposed specimens.
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Nord, Lars O., and Helmer G. Andersen. "A Study of Parameters Affecting the Combustion Stability and Emissions Behavior of Alstom Heavy-Duty Gas Turbines." In ASME Turbo Expo 2004: Power for Land, Sea, and Air. ASMEDC, 2004. http://dx.doi.org/10.1115/gt2004-53228.

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A number of factors can influence the combustion instability region and emission behavior of a heavy-duty gas turbine. Changes in the composition of the natural gas supplied have an impact that was studied in a prior investigation, which focused on parameters such as fuel temperature and composition. To further investigate the fuel sensitivity additional plants were included in this study. In addition to the fuel properties the distribution of the fuel inside the combustor was examined. To expand the fuel properties study, additional parameters were examined. Ambient conditions were paid special interest, specifically ambient temperature and humidity. Included in this study was also the effect on combustion of changes in compressor discharge pressure. With the growing interest in inlet chilling a pulsation/emission study was included to specifically look for NOx and combustion instability effects due to inlet chilling. Also, influences from special occurrences such as on-line compressor washing were examined. The turbines in this study utilize a silo-type combustor with either the DLN [Dry Low NOx] EV [EnVironmental] burners or with single diffusion burners using water or steam as NOx reduction medium. The rated power output of the gas turbines was in the range of 50–120 MW. The data acquired included frequency-analyzed combustion instabilities, various process data, as well as ambient conditions and fuel composition. The collected data shows the magnitude of the changes in the emissions and combustion noise with changes in the parameters studied. The conclusion is that some key parameters are very important for both the pulsations and the emissions, whereas others can be neglected. Some parameters affect the combustion instabilities only, without noticeable effect on emissions, and vice versa.
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5

Schell, Susanne, and Ghislain Singla. "Fuel Switchover at High Load, Integration Into an Engine Operation Concept." In ASME Turbo Expo 2014: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/gt2014-25545.

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The capability to switch online from a main to a back-up fuel is a necessity for dual fuel gas turbines. The switching procedure is itself challenging; fuel gas, fuel oil and supporting systems need to be operated in parallel, with the safe start-up and shut-down of each system having to be ensured. Additionally, the requirements of gas turbine and combined cycle have to be considered; with the target to provide fast reliable fuel switching, without a major effect on the power output. Alstom’s GT26/GT24 High Load Fuel Switchover (HLFSW) fulfils these requirements. HLFSW is a concept which allows switching back and forth between fuel gas and fuel oil in the load range of base load down to 60 % relative GT load. A key feature of the HLFSW is the stable load during the complete duration of the fuel switchover process, ensuring nearly constant power output in combined cycle mode from the moment the fuel switchover is triggered until standard operation is achieved on the secondary fuel. In this paper the integration of the HLFSW into the engine operation concept is presented. It is shown, how the sequential combustion of the Alstom GT26/GT24 is transferred from primary to secondary fuel by sequential fuel switchover. The focus is on how the high load fuel switchover concept is embedded into the gas turbine’s engine operation concept, allowing a smooth transfer between the fuel gas standard operation concept and the fuel oil standard operation concept and vice-versa, resulting in a fuel switchover concept without any significant disturbances to the heat recovery steam generator (HRSG).
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6

Fischer, Manfred. "The Core Melt Stabilization Concept of the EPR and Its Experimental Validation." In 14th International Conference on Nuclear Engineering. ASMEDC, 2006. http://dx.doi.org/10.1115/icone14-89088.

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The strategy of the European Pressurized Water Reactor (EPR) to avoid severe accident conditions is based on the improved defense-in-depth approaches of the French “N4” and the German “Konvoi” plants. In addition, the EPR takes measures, at the design stage, to drastically limit the consequences of a postulated core-melt accident. The latter requires a strengthening of the confinement function and a significant reduction of the risk of short- and long-term containment failure. Scenarios with potentially high mechanical loads and large early releases like: high-pressure RPV failure, global hydrogen detonation, and energetic steam explosion must be prevented. The remaining low-pressure sequences are mitigated by dedicated measures that include hydrogen recombination, sustained heat removal out of the containment, and the stabilization of the molten core in an ex-vessel core catcher located in a compartment lateral to the pit. The spatial separation protects the core catcher from loads during RPV failure and, vice versa, eliminates concerns related with its unintended flooding during power operation. To make the relocation of the melt into the core catcher scenario-independent and robust against the uncertainties associated with in-vessel molten pool formation and RPV failure, the corium is temporarily retained, accumulated and conditioned in the pit during interaction with a sacrificial concrete layer. Spreading of the accumulated molten pool is initiated by penetrating a concrete plug in the bottom. The increase in surface-to-volume ratio achieved by the spreading process strongly enhances quenching and cool-down of the melt after flooding. The required water is passively drained from the IRWST. After availability of the containment heat removal system the steam from the boiling pool is re-condensed by sprays. The CHRS can also optionally cool the core catcher directly, which, in consequence, establishes a sub-cooled pool near-atmospheric pressure levels in the containment. The described concept rests on a large experimental knowledge base which covers all main phenomena involved, including melt interaction with structural material, melt spreading, melt and quenching, as well as the efficacy of the core catcher cooling. Besides giving an overview of the EPR core melt mitigation concept, the paper summarizes its R&D bases and describes which conclusions have been drawn from the various experimental projects and how these conclusions are used in the validation of the EPR concept.
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Gambini, Marco, and Michela Vellini. "CO2 Emission Abatement in CC-IGCC Power Plants: Energy and Economic Comparisons." In ASME 2008 2nd International Conference on Energy Sustainability collocated with the Heat Transfer, Fluids Engineering, and 3rd Energy Nanotechnology Conferences. ASMEDC, 2008. http://dx.doi.org/10.1115/es2008-54166.

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In this paper two methodologies, able to avoid CO2 dispersion in atmosphere, have been analyzed: • treating exhaust gases in order to remove, liquefy and store the produced carbon dioxide; • de-carbonizing fossil fuels before using them in the combustion in order to inhibit completely carbon dioxide production. These methodologies have been implemented in advanced power plants based on gas turbine: a combined cycle power plant (CC), fed by natural gas, and an integrated gasification combined cycle (IGCC), fed by coal. The exhaust gas treatment is based on a chemical process of absorption, while the fossil fuel decarbonization is based on partial oxidation of methane, steam methane reforming and coal gasification. These systems require material and energetic integrations with the power sections and so the best interconnections must be investigated in order to obtain good overall performance. With reference to thermodynamic and economic performance, significant comparisons have been made between the above mentioned reference plants. An efficiency decrease and an increase in the cost of electricity have been obtained when power plants are equipped with systems able to reduce CO2 emissions. However, in order to obtain low CO2 emissions when coal is used, the coal decarbonization must be implemented: in this case it is possible to attain a global efficiency of about 38%, a specific emission of 0.1117 kg/kWh and an increase of kWh cost of about 32%. Vice versa, in order to obtain low CO2 emissions when natural gas is used, the exhaust gas treatment must be implemented: in this case it is possible to attain a global efficiency of about 50.7%, a specific emission of 0.0391 kg/kWh and an increase of kWh cost of about 15%. The clean use of coal seems to have good potential because it allows low energy penalizations (about 7.5 percentage points) and economic increases of about 32%. Because of the great availability, the homogeneous distribution and the low cost of this fuel, these results seem to be very interesting especially in the viewpoint of a transition towards the “hydrogen economy”, based, at least in the medium term, on fossil fuels.
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Helbig, Klaus, Dennis Jarmowski, Felix Koelzow, and Christian Kontermann. "Probabilistic Lifetime Assessment Approach of 2%-Cr Steel Considering Material and Loading Profile Scatter." In ASME Turbo Expo 2019: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/gt2019-91297.

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Abstract In regions with high intermittent renewable energy share, thermal plants are forced to operate with greater flexibility beyond their original design intent. Decreasing energy prices and capacity factors will further force these plants to more transient operation with steeper load gradients. Older steam turbine (ST) protections systems on site are often not designed for such flexible operation and do not properly supervise the resulting impact on lifetime consumption. Therefore, precise lifetime management concepts are required to increase plant reliability and flexibility, and to mitigate risks for new implemented operation modes. Several lifetime assessment methods were developed to quantify the damage evolution and the residual lifetime for ST components. Usually, these methods require both input about representative or operated loading profiles as well as characteristic material curves. These characteristic curves are determined by a number of standardized material tests. Due to the material scatter and other different sources of uncertainties, each test is a realization of a stochastic process. Hence, the corresponding characteristic material curves inherit these uncertainties and do not represent an absolute limit. The analyses of different loading profiles even for the same plant and same start-up class reveal that the consideration of statistically evaluated specific start-up distributions and further transient events are of major importance. Probabilistic methods are able to quantify all of these uncertainties and compute the probability of failure for a given lifetime or vice versa. Within this paper, at first an extensive and systematic operational profile analysis is carried out and discussed, which acts as an input for a probabilistic lifetime assessment approach. For that, a developed probabilistic workflow is presented to quantify the uncertainties and for lifetime prediction using the generalized damage accumulation rule with focus on creep-fatigue loading. To quantify the characteristic material curves, existing experimental data of a 2%-Cr forged steel (23CrMoNiWV8-8) is used. A probabilistic representation of the Wilshire-Scharning equation characterizes the creep rupture behavior. The maximum-likelihood method is used for parameter estimation and to take still running long term creep experiments into account. The end of life in low cycle fatigue experiments is characterized by a macroscopic crack initiation and the Manson-Coffin-Basquin equation is utilized to represent the characteristic material curve. A temperature modified version of the Manson-Coffin-Basquin equation is used to represent the experimental data. The parameter estimation is done by using the linear regression analysis followed by a comprehensive regression diagnostic. Taking both, the material and the load scatter into account, a reliability analysis is carried out to compute the probability of crack initiation. Finally, different load cases are considered and evaluated against each other.
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