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Journal Articles

HelioPoint – A Fast Airborne Calibration Method for Heliostat Fields

Julian J. Krauth, Christoph Happich, Niels Algner, Rafal Broda, Andreas Kämpgen, Alexander Schnerring, Steffen Ulmer, Marc Röger
Journal: Journal of Solar Energy Engineering
Publisher: ASME
Article Type: Research Papers
J. Sol. Energy Eng. December 2024, 146(6): 061005.
Paper No: SOL-23-1349
https://doi.org/10.1115/1.4065868
Published Online: July 19, 2024
View Article titled, HelioPoint – A Fast Airborne Calibration Method for Heliostat Fields
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Topics: Calibration, Heliostats
Journal Articles

Techniques to Measure Solar Flux Density Distribution on Large-Scale Receivers

Marc Röger, Patrik Herrmann, Steffen Ulmer, Miriam Ebert, Christoph Prahl, Felix Göhring
Journal: Journal of Solar Energy Engineering
Publisher: ASME
Article Type: Research-Article
J. Sol. Energy Eng. August 2014, 136(3): 031013.
Paper No: SOL-12-1062
https://doi.org/10.1115/1.4027261
Published Online: May 2, 2014
View Article titled, Techniques to Measure Solar Flux Density Distribution on Large-Scale Receivers
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Topics: Density, Sensors, Simulation, Solar energy
Journal Articles

Validation of Two Optical Measurement Methods for the Qualification of the Shape Accuracy of Mirror Panels for Concentrating Solar Systems

Tobias März, Christoph Prahl, Steffen Ulmer, Stefan Wilbert, Christian Weber
Journal: Journal of Solar Energy Engineering
Publisher: ASME
Article Type: Research Papers
J. Sol. Energy Eng. August 2011, 133(3): 031022.
https://doi.org/10.1115/1.4004240
Published Online: August 16, 2011
View Article titled, Validation of Two Optical Measurement Methods for the Qualification of the Shape Accuracy of Mirror Panels for Concentrating Solar Systems
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Topics: Errors, Mirrors, Optical measurement, Photogrammetry, Shapes, Solar energy, Uncertainty
Journal Articles

Heliostat Shape and Orientation by Edge Detection

Marc Röger, Christoph Prahl, Steffen Ulmer
Journal: Journal of Solar Energy Engineering
Publisher: ASME
Article Type: Research Papers
J. Sol. Energy Eng. May 2010, 132(2): 021002.
https://doi.org/10.1115/1.4001400
Published Online: April 29, 2010
View Article titled, Heliostat Shape and Orientation by Edge Detection
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Topics: Corners (Structural elements), Edge detection, Uncertainty, Photogrammetry, Shapes, Resolution (Optics)
Proceedings Papers

Measurement Techniques for the Optical Quality Assessment of Parabolic Trough Collector Fields in Commercial Solar Power Plants

Steffen Ulmer, Klaus Pottler, Eckhard Lu¨pfert, Marc Ro¨ger
Proc. ASME. ES2007, ASME 2007 Energy Sustainability Conference, 1085-1091, July 27–30, 2007
Publisher: American Society of Mechanical Engineers
Paper No: ES2007-36221
https://doi.org/10.1115/ES2007-36221
View Paper titled, Measurement Techniques for the Optical Quality Assessment of Parabolic Trough Collector Fields in Commercial Solar Power Plants
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Topics: Parabolic troughs, Solar power stations, Manufacturing, Mirrors, Assembly lines, Calibration, Computers, Concentrating solar power, Errors, Photogrammetry
Journal Articles

Slope Error Measurements of Parabolic Troughs Using the Reflected Image of the Absorber Tube

Steffen Ulmer, Boris Heinz, Klaus Pottler, Eckhard Lüpfert
Journal: Journal of Solar Energy Engineering
Publisher: ASME
Article Type: Research Papers
J. Sol. Energy Eng. February 2009, 131(1): 011014.
https://doi.org/10.1115/1.3035811
Published Online: January 9, 2009
View Article titled, Slope Error Measurements of Parabolic Troughs Using the Reflected Image of the Absorber Tube
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Topics: Errors, Parabolic troughs, Photogrammetry, Reflection, Shapes, Resolution (Optics)
Proceedings Papers

Beam Characterization and Improvement With a Flux Mapping System for Dish Concentrators

Steffen Ulmer, Wolfgang Reinalter, Peter Heller, Eckhard Lu¨pfert, Diego Martinez
Proc. ASME. SED2002, Solar Energy, 285-292, June 15–20, 2002
Publisher: American Society of Mechanical Engineers
Paper No: SED2002-1064
https://doi.org/10.1115/SED2002-1064
View Paper titled, Beam Characterization and Improvement With a Flux Mapping System for Dish Concentrators
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Topics: Brightness (Photometry), Calibration, Membranes, Solar energy, Water
Proceedings Papers

Comparative Flux Measurement and Raytracing for the Characterization of the Focal Region of Solar Parabolic Trough Collectors

Eckhard Lu¨pfert, Andreas Neumann, Klaus-J. Riffelmann, Steffen Ulmer
Proc. ASME. ISEC2004, Solar Energy, 689-694, July 11–14, 2004
Publisher: American Society of Mechanical Engineers
Paper No: ISEC2004-65157
https://doi.org/10.1115/ISEC2004-65157
View Paper titled, Comparative Flux Measurement and Raytracing for the Characterization of the Focal Region of Solar Parabolic Trough Collectors
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Topics: Parabolic troughs, Ray tracing, Solar energy
Proceedings Papers

Parabolic Trough Analysis and Enhancement Techniques

Eckhard Lu¨pfert, Klaus Pottler, Steffen Ulmer, Klaus-J. Riffelmann, Andreas Neumann, Bjo¨rn Schiricke
Proc. ASME. ISEC2005, Solar Energy, 741-747, August 6–12, 2005
Publisher: American Society of Mechanical Engineers
Paper No: ISEC2005-76023
https://doi.org/10.1115/ISEC2005-76023
View Paper titled, Parabolic Trough Analysis and Enhancement Techniques
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Topics: Parabolic troughs, Ray tracing, Solar energy, Construction, Engineering prototypes, Geometry, Photogrammetry, Shapes, Solar power stations, Testing
Journal Articles

Slope Measurements of Parabolic Dish Concentrators Using Color-Coded Targets

Steffen Ulmer, Peter Heller, Wolfgang Reinalter
Journal: Journal of Solar Energy Engineering
Publisher: ASME
Article Type: Research Papers
J. Sol. Energy Eng. February 2008, 130(1): 011015.
https://doi.org/10.1115/1.2807193
Published Online: December 28, 2007
View Article titled, Slope Measurements of Parabolic Dish Concentrators Using Color-Coded Targets
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Topics: Errors, Ray tracing, Resolution (Optics), Shapes, Reflection, Manufacturing
Journal Articles

Parabolic Trough Optical Performance Analysis Techniques

Eckhard Lüpfert, Klaus Pottler, Steffen Ulmer, Klaus-J. Riffelmann, Andreas Neumann, Björn Schiricke
Journal: Journal of Solar Energy Engineering
Publisher: ASME
Article Type: Research Papers
J. Sol. Energy Eng. May 2007, 129(2): 147–152.
https://doi.org/10.1115/1.2710249
Published Online: June 18, 2006
View Article titled, Parabolic Trough Optical Performance Analysis Techniques
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Topics: Engineering prototypes, Geometry, Mirrors, Parabolic troughs, Photogrammetry, Ray tracing, Shapes, Solar energy, Testing
Journal Articles

Beam Characterization and Improvement with a Flux Mapping System for Dish Concentrators

Steffen Ulmer, Wolfgang Reinalter, Peter Heller, Eckhard Lu¨pfert, Diego Martı´nez
Journal: Journal of Solar Energy Engineering
Publisher: ASME
Article Type: Technical Papers
J. Sol. Energy Eng. May 2002, 124(2): 182–188.
https://doi.org/10.1115/1.1464881
Published Online: April 24, 2002
View Article titled, Beam Characterization and Improvement with a Flux Mapping System for Dish Concentrators
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Topics: Brightness (Photometry), Calibration, Density, Errors, Membranes, Solar energy