@inproceedings{ZiolkoFrickeAnthrakidisetal.2011,
  author    = {Ziolko, Christoph and Fricke, Barbara and Anthrakidis, Anette and Hoffschmidt, Bernhard and Dillig, Marius and Giese, Frank and Schwarzb{\"o}zl, Peter},
  title     = {{\"O}kobilanzielle Aspekte technologischer Entwicklungen des Solarturmkraftwerks},
  series = {Forschung und Entwicklung f{\"u}r solarthermische Kraftwerke : 14. K{\"o}lner Sonnenkolloquium Mittwoch, 13. Juli 2011, im Auditorium des Campus J{\"u}lich der FH Aachen : Kurzfassungen der Vortr{\"a}ge und Poster},
  booktitle = {Forschung und Entwicklung f{\"u}r solarthermische Kraftwerke : 14. K{\"o}lner Sonnenkolloquium Mittwoch, 13. Juli 2011, im Auditorium des Campus J{\"u}lich der FH Aachen : Kurzfassungen der Vortr{\"a}ge und Poster},
  publisher = {DLR},
  address   = {K{\"o}ln},
  pages     = {2 S.},
  year      = {2011},
  language  = {de}
}
@inproceedings{AnderssonAhlbrinkGalletal.2011,
  author    = {Andersson, J. and Ahlbrink, N. and Gall, Jan and Hirsch, T. and Nolte, V. and Teixeira Boura, Cristiano Jos{\´e}},
  title     = {VICERP - dynamische Simulation von Solarturmkraftwerken},
  series = {Forschung und Entwicklung f{\"u}r solarthermische Kraftwerke : 14. K{\"o}lner Sonnenkolloquium Mittwoch, 13. Juli 2011, im Auditorium des Campus J{\"u}lich der FH Aachen : Kurzfassungen der Vortr{\"a}ge und Poster},
  booktitle = {Forschung und Entwicklung f{\"u}r solarthermische Kraftwerke : 14. K{\"o}lner Sonnenkolloquium Mittwoch, 13. Juli 2011, im Auditorium des Campus J{\"u}lich der FH Aachen : Kurzfassungen der Vortr{\"a}ge und Poster},
  publisher = {DLR},
  address   = {K{\"o}ln},
  pages     = {2 S.},
  year      = {2011},
  language  = {de}
}
@inproceedings{VaessenAlexopoulosKluczkaetal.2011,
  author    = {Vaeßen, Christiane and Alexopoulos, Spiros and Kluczka, Sven and Sattler, Johannes Christoph and Roeb, M. and Neises, M. and Abdellatif, T.},
  title     = {Analyse der Verfahren zur solaren Methanolproduktion aus CO2},
  series = {Forschung und Entwicklung f{\"u}r solarthermische Kraftwerke : 14. K{\"o}lner Sonnenkolloquium Mittwoch, 13. Juli 2011, im Auditorium des Campus J{\"u}lich der FH Aachen : Kurzfassungen der Vortr{\"a}ge und Poster},
  booktitle = {Forschung und Entwicklung f{\"u}r solarthermische Kraftwerke : 14. K{\"o}lner Sonnenkolloquium Mittwoch, 13. Juli 2011, im Auditorium des Campus J{\"u}lich der FH Aachen : Kurzfassungen der Vortr{\"a}ge und Poster},
  publisher = {DLR},
  address   = {K{\"o}ln},
  pages     = {2 S.},
  year      = {2011},
  language  = {de}
}
@inproceedings{Hoffschmidt2011,
  author    = {Hoffschmidt, Bernhard},
  title     = {Kooperationen und Ziele am Standort J{\"u}lich},
  series = {Forschung und Entwicklung f{\"u}r solarthermische Kraftwerke : 14. K{\"o}lner Sonnenkolloquium Mittwoch, 13. Juli 2011, im Auditorium des Campus J{\"u}lich der FH Aachen : Kurzfassungen der Vortr{\"a}ge und Poster},
  booktitle = {Forschung und Entwicklung f{\"u}r solarthermische Kraftwerke : 14. K{\"o}lner Sonnenkolloquium Mittwoch, 13. Juli 2011, im Auditorium des Campus J{\"u}lich der FH Aachen : Kurzfassungen der Vortr{\"a}ge und Poster},
  publisher = {DLR},
  address   = {K{\"o}ln},
  pages     = {4 S.},
  year      = {2011},
  language  = {de}
}
@inproceedings{Vitting2011,
  author    = {Vitting, Eva},
  title     = {Designprojekte zu Solarenergie: Wie kommunizieren wir unsere Technik?},
  series = {Forschung und Entwicklung f{\"u}r solarthermische Kraftwerke : 14. K{\"o}lner Sonnenkolloquium Mittwoch, 13. Juli 2011, im Auditorium des Campus J{\"u}lich der FH Aachen : Kurzfassungen der Vortr{\"a}ge und Poster},
  booktitle = {Forschung und Entwicklung f{\"u}r solarthermische Kraftwerke : 14. K{\"o}lner Sonnenkolloquium Mittwoch, 13. Juli 2011, im Auditorium des Campus J{\"u}lich der FH Aachen : Kurzfassungen der Vortr{\"a}ge und Poster},
  publisher = {DLR},
  address   = {K{\"o}ln},
  pages     = {3 S.},
  year      = {2011},
  language  = {de}
}
@inproceedings{BaumannTeixeiraBouraEcksteinetal.2011,
  author    = {Baumann, Torsten and Teixeira Boura, Cristiano Jos{\´e} and Eckstein, Julian and Felinks, Jan and G{\"o}ttsche, Joachim and Hoffschmidt, Bernhard and Schmitz, Stefan and Zunft, Stefan},
  title     = {Air-sand heat exchanger},
  series = {6th International Renewable Energy Storage Conference (IRES 2011) : November 28 - 30, 2011, bcc Berlin Congress Center, Berlin, Germany / EUROSOLAR ...},
  booktitle = {6th International Renewable Energy Storage Conference (IRES 2011) : November 28 - 30, 2011, bcc Berlin Congress Center, Berlin, Germany / EUROSOLAR ...},
  publisher = {Eurosolar},
  address   = {Bonn},
  pages     = {1 CD-ROM},
  year      = {2011},
  language  = {de}
}
@inproceedings{AlexopoulosHoffschmidtRauetal.2011,
  author    = {Alexopoulos, Spiros and Hoffschmidt, Bernhard and Rau, Christoph and Sattler, Johannes, Christoph},
  title     = {Choice of solar share of a hybrid power plant of a central receiver system and a biogas plant in dependency of the geographical latitude},
  series = {World Renewable Energy Congress-Sweden : 8 -13 May, 2011, Link{\"o}ping, Sweden / ed.: Bahram Moshfegh},
  booktitle = {World Renewable Energy Congress-Sweden : 8 -13 May, 2011, Link{\"o}ping, Sweden / ed.: Bahram Moshfegh},
  publisher = {Univ. Electronic Pr.},
  address   = {Link{\"o}ping},
  isbn      = {9789173930703},
  pages     = {3710 -- 3717},
  year      = {2011},
  language  = {en}
}
@inproceedings{HoffschmidtTelleSauerbornetal.2011,
  author    = {Hoffschmidt, Bernhard and Telle, R. and Sauerborn, Markus and Wagner, M.},
  title     = {Optical measurement system for high temperature absorbers},
  series = {SolarPACES 2011 : concentrating solar power and chemical energy systems : 20 - 23 September, 2011, Granada, Spain},
  booktitle = {SolarPACES 2011 : concentrating solar power and chemical energy systems : 20 - 23 September, 2011, Granada, Spain},
  address   = {Granada},
  pages     = {1 CD-ROM},
  year      = {2011},
  language  = {en}
}
@inproceedings{TeixeiraBouraEcksteinFelinksetal.2011,
  author    = {Teixeira Boura, Cristiano Jos{\´e} and Eckstein, J. and Felinks, J. and G{\"o}ttsche, Joachim and Hoffschmidt, Bernhard and Schmitz, S.},
  title     = {3-D CFD simulation of an air-sand heat exchanger},
  series = {SolarPACES 2011 : concentrating solar power and chemical energy systems : 20 - 23 September, 2011, Granada, Spain},
  booktitle = {SolarPACES 2011 : concentrating solar power and chemical energy systems : 20 - 23 September, 2011, Granada, Spain},
  address   = {Granada},
  pages     = {1 CD-ROM},
  year      = {2011},
  language  = {en}
}
@inproceedings{BaumannTeixeiraBouraGoettscheetal.2011,
  author    = {Baumann, Torsten and Teixeira Boura, Cristiano Jos{\´e} and G{\"o}ttsche, Joachim and Hoffschmidt, Bernhard and Schmitz, Stefan and Zunft, Stefan},
  title     = {Air-sand heat exchanger: materials and flow properties},
  series = {SolarPACES 2011 : concentrating solar power and chemical energy systems : 20 - 23 September, 2011, Granada, Spain},
  booktitle = {SolarPACES 2011 : concentrating solar power and chemical energy systems : 20 - 23 September, 2011, Granada, Spain},
  address   = {Granada},
  pages     = {1 CD-ROM},
  year      = {2011},
  language  = {en}
}
@inproceedings{AchenbachGoettscheKaufholdetal.2011,
  author    = {Achenbach, Timm and G{\"o}ttsche, Joachim and Kaufhold, O. and Hoffschmidt, Bernhard},
  title     = {Development of an edge module for open volumetric receiver for the use of the radiation at the receiver boundary region},
  series = {SolarPACES 2011 : concentrating solar power and chemical energy systems : 20 - 23 September, 2011, Granada, Spain},
  booktitle = {SolarPACES 2011 : concentrating solar power and chemical energy systems : 20 - 23 September, 2011, Granada, Spain},
  address   = {Granada},
  pages     = {1 CD-ROM},
  year      = {2011},
  language  = {en}
}
@inproceedings{AchenbachGeimerGoettscheetal.2011,
  author    = {Achenbach, Timm and Geimer, K. and G{\"o}ttsche, Joachim and Hoffschmidt, Bernhard and Lynen, A. and Bauer, J.},
  title     = {Simulation and flow measurements of volumetric high temperature absorbers for solar tower power plants},
  series = {SolarPACES 2011 : concentrating solar power and chemical energy systems : 20 - 23 September, 2011, Granada, Spain},
  booktitle = {SolarPACES 2011 : concentrating solar power and chemical energy systems : 20 - 23 September, 2011, Granada, Spain},
  address   = {Granada},
  pages     = {1 CD-ROM},
  year      = {2011},
  language  = {en}
}
@inproceedings{HirschAhlbrinkPitzPaaletal.2011,
  author    = {Hirsch, Tobias and Ahlbrink, Nils and Pitz-Paal, Robert and Teixeira Boura, Cristiano Jos{\´e} and Hoffschmidt, Bernhard and Gall, Jan and Abel, Dirk and Nolte, Vera and Wirsum, Manfred and Andersson, Joel and Diehl, Moritz},
  title     = {Dynamic simulation of a solar tower system with open volumetric receiver - a review on the ViCERP project},
  series = {SolarPACES 2011 : concentrating solar power and chemical energy systems : 20 - 23 September, 2011, Granada, Spain},
  booktitle = {SolarPACES 2011 : concentrating solar power and chemical energy systems : 20 - 23 September, 2011, Granada, Spain},
  address   = {Granada},
  pages     = {1 CD-ROM},
  year      = {2011},
  language  = {en}
}
@inproceedings{FrickeZiolkoAnthrakidisetal.2011,
  author    = {Fricke, Barbara and Ziolko, C. and Anthrakidis, Anette and Alexopoulos, Spiros and Hoffschmidt, Bernhard and Dillig, M. and Giese, F.},
  title     = {InnoSol - life cycle analysis of solar power tower plants},
  series = {SolarPACES 2011 : concentrating solar power and chemical energy systems : 20 - 23 September, 2011, Granada, Spain},
  booktitle = {SolarPACES 2011 : concentrating solar power and chemical energy systems : 20 - 23 September, 2011, Granada, Spain},
  address   = {Granada},
  pages     = {1 CD-ROM},
  year      = {2011},
  language  = {en}
}
@inproceedings{AlexopoulosHoffschmidtRau2011,
  author    = {Alexopoulos, Spiros and Hoffschmidt, Bernhard and Rau, Christoph},
  title     = {Comparison of steady-state and transient simulations for solar tower power plants with open-volumetric receiver},
  series = {SolarPACES 2011 : concentrating solar power and chemical energy systems : 20 - 23 September, 2011, Granada, Spain},
  booktitle = {SolarPACES 2011 : concentrating solar power and chemical energy systems : 20 - 23 September, 2011, Granada, Spain},
  address   = {Granada},
  pages     = {1 CD-ROM},
  year      = {2011},
  language  = {en}
}
@inproceedings{Sauerborn2011,
  author    = {Sauerborn, Markus},
  title     = {Investigations to the influence of clouds and aerosols to the haze of the sunshape},
  series = {SolarPACES 2011 : concentrating solar power and chemical energy systems : 20 - 23 September, 2011, Granada, Spain},
  booktitle = {SolarPACES 2011 : concentrating solar power and chemical energy systems : 20 - 23 September, 2011, Granada, Spain},
  address   = {Granada},
  pages     = {1 CD-ROM},
  year      = {2011},
  language  = {en}
}
@techreport{HoffschmidtAlexopoulos2011,
  author    = {Hoffschmidt, Bernhard and Alexopoulos, Spiros},
  title     = {Entwicklung der Designvoraussetzungen f{\"u}r ein hybrides Solarthermisches Kraftwerk : Kurztitel: HybSol ; Abschlussbericht ; Berichtszeitraum: 01.03.2007 - 31.10.2010 ; [F{\"o}rderprogramm: FHprofUnt]},
  publisher = {Solar-Inst.},
  address   = {J{\"u}lich},
  pages     = {114 S.},
  year      = {2011},
  language  = {de}
}
@article{Alexopoulos2012,
  author    = {Alexopoulos, Spiros},
  title     = {Biogas systems: basics, biogas multifunction, principle of fermentation and hybrid application with a solar tower for the treatment of waste animal manure},
  series = {Journal of Engineering Science and Technology Review},
  volume    = {5},
  journal   = {Journal of Engineering Science and Technology Review},
  number    = {4},
  issn      = {1791-2377},
  pages     = {48 -- 55},
  year      = {2012},
  abstract  = {Two of the main environmental problems of today's society are the continuously increasing production of organic wastes as well as the increase of carbon dioxide in the atmosphere and the related green house effect. A way to solve these problems is the production of biogas. Biogas is a combustible gas consisting of methane, carbon dioxide and small amounts of other gases and trace elements. Production of biogas through anaerobic digestion of animal manure and slurries as well as of a wide range of digestible organic wastes and agricultural residues, converts these substrates into electricity and heat and offers a natural fertiliser for agriculture. The microbiological process of decomposition of organic matter, in the absence of oxygen takes place in reactors, called digesters. Biogas can be used as a fuel in a gas turbine or burner and can be used in a hybrid solar tower system offering a solution for waste treatment of agricultural and animal residues. A solar tower system consists of a heliostat field, which concentrates direct solar irradiation on an open volumetric central receiver. The receiver heats up ambient air to temperatures of around 700°C. The hot air's heat energy is transferred to a steam Rankine cycle in a heat recovery steam generator (HRSG). The steam drives a steam turbine, which in turn drives a generator for producing electricity. In order to increase the operational hours of a solar tower power plant, a heat storage system and/ or hybridization may be considered. The advantage of solar-fossil hybrid power plants, compared to solar-only systems, lies in low additional investment costs due to an adaptable solar share and reduced technical and economical risks. On sunny days the hybrid system operates in a solar-only mode with the central receiver and on cloudy days and at night with the gas turbine only. As an alternative to methane gas, environmentally neutral biogas can be used for operating the gas turbine. Hence, the hybrid system is operated to 100\% from renewable energy sources},
  language  = {en}
}
@inproceedings{AlexopoulosKluczkaVaessenetal.2012,
  author    = {Alexopoulos, Spiros and Kluczka, Sven and Vaeßen, Christiane and Roeb, M. and Neises, M.},
  title     = {Scenario development for efficient methanol production using CO2 and solar energy},
  series = {Eurosun 2012 : Solar energy for a brighter future : conference proceedings : Rijeka, 18.-22.09.2012},
  booktitle = {Eurosun 2012 : Solar energy for a brighter future : conference proceedings : Rijeka, 18.-22.09.2012},
  address   = {Rijeka},
  pages     = {ID 99},
  year      = {2012},
  language  = {en}
}
@inproceedings{SauerbornKlimekHoffschmidtetal.2012,
  author    = {Sauerborn, Markus and Klimek, J. and Hoffschmidt, Bernhard and Essen, H. and Sieger, S. and Biegel, G. and G{\"o}ttsche, Joachim and Hilger, Patrick},
  title     = {Eurosun 2012 : radar technology for heliostat posititon control},
  series = {Eurosun 2012 : Solar energy for a brighter future : conference proceedings : Rijeka, 18.-22.09.2012},
  booktitle = {Eurosun 2012 : Solar energy for a brighter future : conference proceedings : Rijeka, 18.-22.09.2012},
  address   = {Rijeka},
  pages     = {ID 80},
  year      = {2012},
  language  = {en}
}