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Dive into the research topics where Christian Lohrer is active.

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Featured researches published by Christian Lohrer.


Journal of Loss Prevention in The Process Industries | 2003

Self-ignition of dust at reduced volume fractions of ambient oxygen

Martin Schmidt; Christian Lohrer; Ulrich Krause

Abstract Experiments were performed to investigate the self-ignition behaviour of accumulations of four different technical dusts at oxygen volume fractions ranging from 1.3 to 21%. For this purpose a laboratory oven used for hot storage testing was modified to allow flushing with the pre-mixed oxygen/nitrogen mixture of the desired composition. It was found that for all sample volumes investigated the self-ignition temperatures were higher the lower was the oxygen volume fraction. In addition, the type of reaction changed obviously, since the apparent activation energy significantly decreased at oxygen volume fractions below 6%. However, it was still possible to observe exothermic effects at oxygen volume fractions as low as 1.3%. A numerical model was established to simulate the process of self-ignition including the coupled heat and mass transfer within the dust accumulation using a finite element solver. The model consists of six balance equations for the heat transfer and the transport of five chemical species. It shows that the model reflects self-ignition in dust accumulations with satisfying accuracy, as long as the input data generated by preceding experiments are reliable.


Journal of Loss Prevention in The Process Industries | 2009

A mathematical model to predict the heating-up of large-scale wood piles

Fabio Ferrero; Christian Lohrer; Bernd Schmidt; Matthias Noll; Marcus Malow


Journal of Loss Prevention in The Process Industries | 2005

A study on the influence of liquid water and water vapour on the self-ignition of lignite coal-experiments and numerical simulations

Christian Lohrer; Martin Schmidt; Ulrich Krause


Journal of Loss Prevention in The Process Industries | 2006

A numerical model to simulate smouldering fires in bulk materials and dust deposits

Ulrich Krause; Martin Schmidt; Christian Lohrer


Process Safety and Environmental Protection | 2005

Self-Ignition of Combustible Bulk Materials Under Various Ambient Conditions

Christian Lohrer; Ulrich Krause; J. Steinbach


Journal of Loss Prevention in The Process Industries | 2008

Propane/air deflagrations and CTA measurements of turbulence inducing elements in closed pipes

Christian Lohrer; Christian Drame; Bernd Schalau; Rainer Grätz


Chemical Engineering & Technology | 2011

Aerosol Emissions from Outdoor Firework Displays

Andreas Dutschke; Christian Lohrer; Lutz Kurth; Stefan Seeger; M. Barthel; U. Panne


Chemie Ingenieur Technik | 2009

Gasförmige und feste Reaktionsprodukte beim Abbrand von Indoor-Feuerwerk

Andreas Dutschke; Christian Lohrer; Stefan Seeger; Lutz Kurth


Chemie Ingenieur Technik | 2002

Selbstentzündung von Stäuben und Schüttgütern bei vermindertem Sauerstoffgehalt

Martin Schmidt; Marcus Malow; Christian Lohrer; Ulrich Krause


Chemie Ingenieur Technik | 2004

Bewertungskriterien für die Selbstentzündung von Schüttgütern, Stäuben und porösen Feststoffen

Ulrich Krause; Christian Lohrer; Martin Schmidt

Collaboration


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Ulrich Krause

Otto-von-Guericke University Magdeburg

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Martin Schmidt

Otto-von-Guericke University Magdeburg

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Marcus Malow

Bundesanstalt für Materialforschung und -prüfung

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Andreas Dutschke

Bundesanstalt für Materialforschung und -prüfung

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J. Steinbach

Technical University of Berlin

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Lutz Kurth

Bundesanstalt für Materialforschung und -prüfung

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Rainer Grätz

Bundesanstalt für Materialforschung und -prüfung

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Detlef Arndt

Bundesanstalt für Materialforschung und -prüfung

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Stefan Seeger

Bundesanstalt für Materialforschung und -prüfung

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