TY  - CHAP
A1  - Neumann, Hannah
A1  - Adam, Mario
A1  - Backes, Klaus
A1  - Börner, Martin
A1  - Clees, Tanja
A1  - Doetsch, Christian
A1  - Glaeser, Susanne
A1  - Herrmann, Ulf
A1  - May, Johanna
A1  - Rosenthal, Florian
A1  - Sauer, Dirk Uwe
A1  - Stadler, Ingo
T1  - Development of open educational resources for renewable energy and the energy transition process
T2  - ISES SWC 2021
N2  - The dissemination of knowledge about renewable energies is understood as a social task with the highest topicality. The transfer of teaching content on renewable energies into digital open educational resources offers the opportunity to significantly accelerate the implementation of the energy transition. Thus, in the here presented project six German universities create open educational resources for the energy transition. These materials are available to the public on the internet under a free license. So far there has been no publicly accessible, editable media that cover entire learning units about renewable energies extensively and in high technical quality. Thus, in this project, the content that remains up-to-date for a longer period is appropriately prepared in terms of media didactics. The materials enable lecturers to provide students with in-depth training about technologies for the energy transition. In a particular way, the created material is also suitable for making the general public knowledgeable about the energy transition with scientifically based material.
KW  - energy transition
KW  - renewable energies
KW  - open educational resources
KW  - dissemination
KW  - digitalization
Y1  - 2021
U6  - http://dx.doi.org/10.18086/swc.2021.47.03
N1  - ISES Solar World Congress, virtual conference 25-29 October 2021
PB  - International Solar Energy Society
CY  - Freiburg
ER  - 
TY  - JOUR
A1  - Meyer, S.
A1  - Hänel, Matthias
A1  - Beeh, B.
A1  - Dittmann-Gabriel, Sören
A1  - Dluhosch, R.
A1  - May, Martin
A1  - Herrmann, Ulf
A1  - [und 5 weitere], 
T1  - Multifunktionaler thermischer Stromspeicher für die Strom- und Wärmeversorgung der Industrie von morgen
JF  - ETG Journal / Energietechnische Gesellschaft im VDE (ETG)
Y1  - 2020
SN  - 2625-9907
VL  - 2020
IS  - 1
SP  - 6
EP  - 9
ER  - 
TY  - CHAP
A1  - May, Martin
A1  - Breitbach, Gerd
A1  - Alexopoulos, Spiros
A1  - Latzke, Markus
A1  - Bäumer, Klaus
A1  - Uhlig, Ralf
A1  - Söhn, Matthias
A1  - Teixeira Boura, Cristiano José
A1  - Herrmann, Ulf
T1  - Experimental facility for investigations of wire mesh absorbers for pressurized gases
T2  - AIP Conference Proceedings
Y1  - 2019
U6  - http://dx.doi.org/10.1063/1.5117547
SN  - 0094243X
VL  - 2126
SP  - 030035-1
EP  - 030035-9
ER  - 
TY  - CHAP
A1  - Mahdi, Zahra
A1  - Rendón, Carlos
A1  - Schwager, Christian
A1  - Teixeira Boura, Cristiano José
A1  - Herrmann, Ulf
T1  - Novel concept for indirect solar-heated methane reforming
T2  - AIP Conference Proceedings
Y1  - 2019
U6  - http://dx.doi.org/10.1063/1.5117694
SN  - 0094-243X
VL  - 2126
SP  - 180014-1
EP  - 180014-7
PB  - AIP Publishing
CY  - Melville, NY
ER  - 
TY  - CHAP
A1  - Mahdi, Zahra
A1  - Dersch, Jürgen
A1  - Schmitz, Pascal
A1  - Dieckmann, Simon
A1  - Caminos, Ricardo Alexander Chico
A1  - Teixeira Boura, Cristiano José
A1  - Herrmann, Ulf
A1  - Schwager, Christian
A1  - Schmitz, Mark
A1  - Gielen, Hans
A1  - Gedle, Yibekal
A1  - Büscher, Rauno
T1  - Technical assessment of Brayton cycle heat pumps for the integration in hybrid PV-CSP power plants
T2  - SOLARPACES 2020
N2  - The hybridization of Concentrated Solar Power (CSP) and Photovoltaics (PV) systems is a promising approach to reduce costs of solar power plants, while increasing dispatchability and flexibility of power generation. High temperature heat pumps (HT HP) can be utilized to boost the salt temperature in the thermal energy storage (TES) of a Parabolic Trough Collector (PTC) system from 385 °C up to 565 °C. A PV field can supply the power for the HT HP, thus effectively storing the PV power as thermal energy. Besides cost-efficiently storing energy from the PV field, the power block efficiency of the overall system is improved due to the higher steam parameters. This paper presents a technical assessment of Brayton cycle heat pumps to be integrated in hybrid PV-CSP power plants. As a first step, a theoretical analysis was carried out to find the most suitable working fluid. The analysis included the fluids Air, Argon (Ar), Nitrogen (N2) and Carbon dioxide (CO2). N2 has been chosen as the optimal working fluid for the system. After the selection of the ideal working medium, different concepts for the arrangement of a HT HP in a PV-CSP hybrid power plant were developed and simulated in EBSILON®Professional. The concepts were evaluated technically by comparing the number of components required, pressure losses and coefficient of performance (COP).
KW  - Solar thermal technologies
KW  - Hybrid energy system
KW  - Concentrated solar power
KW  - Power plants
KW  - Energy storage
Y1  - 2022
SN  - 978-0-7354-4195-8
U6  - http://dx.doi.org/10.1063/5.0086269
SN  - 1551-7616 (online)
SN  - 0094-243X (print)
N1  - 26th International Conference on Concentrating Solar Power and Chemical Energy Systems
28 September–2 October 2020
Freiburg, Germany
IS  - 2445 / 1
PB  - AIP conference proceedings / American Institute of Physics
CY  - Melville, NY
ER  - 
TY  - CHAP
A1  - Lüpfert, E.
A1  - Herrmann, Ulf
A1  - Price, Henry
A1  - Zarza, E.
A1  - Kistener, R.
ED  - Ramos, C.
T1  - Towards Standard Performance Analysis for Parabolic Trough Collector Fields
T2  - 12th International Symposium Solar Power and Chemical Energy Systems, October 6-8, 2004, Oaxaca Mexico ; SolarPACES International Symposium, 12
Y1  - 2004
SN  - 968-6114-18-1
PB  - Instituto de Investigaciones Electricas
CY  - [s.l.]
ER  - 
TY  - CHAP
A1  - Lahrs, Lennart
A1  - Krisam, Pierre
A1  - Herrmann, Ulf
T1  - Envisioning a collaborative energy system planning platform for the energy transition at the district level
T2  - The 36th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems
N2  - Residential and commercial buildings account for more than one-third of global energy-related greenhouse gas emissions. Integrated multi-energy systems at the district level are a promising way to reduce greenhouse gas emissions by exploiting economies of scale and synergies between energy sources. Planning district energy systems comes with many challenges in an ever-changing environment. Computational modelling established itself as the state-of-the-art method for district energy system planning. Unfortunately, it is still cumbersome to combine standalone models to generate insights that surpass their original purpose. Ideally, planning processes could be solved by using modular tools that easily incorporate the variety of competing and complementing computational models. Our contribution is a vision for a collaborative development and application platform for multi-energy system planning tools at the district level. We present challenges of district energy system planning identified in the literature and evaluate whether this platform can help to overcome these challenges. Further, we propose a toolkit that represents the core technical elements of the platform. Lastly, we discuss community management and its relevance for the success of projects with collaboration and knowledge sharing at their core.
KW  - Energy system planning
KW  - District energy planning platform
KW  - District data model
KW  - Renewable energy integration
Y1  - 2023
U6  - http://dx.doi.org/10.52202/069564-0284
N1  - 25-30 JUNE, 2023, Las Palmas de Gran Canaria, Spain
SP  - 3163
EP  - 3170
PB  - Procedings of ECOS 2023
ER  - 
TY  - CHAP
A1  - Kötter, Jens
A1  - Decker, Stefan
A1  - Detzler, Raphael
A1  - Schäfer, Jochen
A1  - Schmitz, Mark
A1  - Herrmann, Ulf
T1  - Cost Reduction of Solar Fields with HelioTrough Collector
Y1  - 2012
N1  - Concentration Solar Power and Chemical Energy Systemes : SolarPaces 2012, September 11 14 2002, Marrakesh, Morroco
PB  - FLAGSOL
CY  - Köln
ER  - 
TY  - CHAP
A1  - Kronhardt, Valentina
A1  - Alexopoulos, Spiros
A1  - Reißel, Martin
A1  - Latzke, Markus
A1  - Rendon, C.
A1  - Sattler, Johannes, Christoph
A1  - Herrmann, Ulf
T1  - Simulation of operational management for the Solar Thermal Test and Demonstration Power Plant Jülich using optimized control strategies of the storage system
T2  - Energy procedia
Y1  - 2015
SN  - 1876-6102
SP  - 1
EP  - 6
ER  - 
TY  - CHAP
A1  - Kelly, Bruce
A1  - Herrmann, Ulf
A1  - Hale, M.-J.
T1  - Optimization Studies for Integrated Solar Combined Cycle Systems
T2  - Solar engineering 2001 : proceedings of the International Solar Energy Conference ; presented at the 2001 International Solar Energy Conference, a part of Forum 2001 - Solar energy: the power to choose, April 21 - 25, 2001, Washington, D.C.
Y1  - 2001
SN  - 0-7918-1670-2
N1  - International Solar Energy Conference <Washington, D.C.>
SP  - 393
EP  - 398
PB  - ASME
CY  - New York, NY
ER  - 
TY  - JOUR
A1  - Kearney, David W.
A1  - Kelly, Bruce
A1  - Herrmann, Ulf
A1  - Cable, R.
A1  - Pacheco, J.
A1  - Mahoney, R.
A1  - Price, Henry
A1  - Blake, D.
A1  - Nava, P.
A1  - Potrovitza, N.
T1  - Engineering Aspects of a Molten Salt Heat Transfer Fluid in a Trough Solar Field
JF  - Energy : the international journal
Y1  - 2002
U6  - http://dx.doi.org/10.1016/S0360-5442(03)00191-9
SN  - 0360-5442
N1  - SolarPACES 2002, Zürich, Switzerland, 4–6 September 2002
VL  - 29
IS  - 5-6 (Special Issue SolarPaces)
SP  - 861
EP  - 870
ER  - 
TY  - JOUR
A1  - Kearney, D.
A1  - Herrmann, Ulf
A1  - Nava, P.
A1  - Kelly, B.
A1  - Mahoney, R.
A1  - Pacheco, J.
A1  - Cable, R.
A1  - Potrovitza, N.
A1  - Blake, D.
A1  - Price, H.
T1  - Assessment of a Molten Salt Heat Transfer Fluid in a Parabolic Trough Solar Field
JF  - Journal of Solar Energy Engineering
Y1  - 2003
U6  - http://dx.doi.org/10.1115/1.1565087
SN  - 1528-8986
VL  - 125
IS  - 2
SP  - 170
EP  - 176
ER  - 
TY  - CHAP
A1  - Janotte, N.
A1  - Feckler, G.
A1  - Kötter, Jens
A1  - Decker, Stefan
A1  - Herrmann, Ulf
A1  - Schmitz, Mark
A1  - Lüpfert, E.
T1  - Dynamic performance evaluation of the HelioTrough® collector demonstration loop : towards a new benchmark in parabolic trough qualification
T2  - SolarPACES International Conference 2013, Las Vegas, Nevada, USA, 17 - 20 September 2013 : [proceedings]. - Pt. 1. - (Energy procedia ; 49)
Y1  - 2014
SN  - 978-1-63266-904-9
U6  - http://dx.doi.org/10.1016/j.egypro.2014.03.012
SN  - 1876-6102
N1  - Nebent.: Power and Chemical Energy Systems concentrating solar power
SP  - 109
EP  - 117
PB  - Curran
CY  - Red Hook, NY
ER  - 
TY  - CHAP
A1  - Herrmann, Ulf
A1  - Worringer, S.
A1  - Graeter, F.
A1  - Nava, P.
ED  - Romero, Manuel
T1  - Three Years of Operation Experience of the SKAL-ET Collector Loop at SEGS V
T2  - 13th International Symposium Concentrated Solar Power and Chemical Energy Technologies, June 20 - 23, 2006, Seville, Spain
Y1  - 2006
SN  - 84-7834-519-1
PB  - SolarPACES [u.a.]
CY  - [s.l.]
ER  - 
TY  - CHAP
A1  - Herrmann, Ulf
A1  - Vorbrugg, O.
A1  - Nava, P.
T1  - Construction and Commissioning Process of the Andasol Solar Field
T2  - SolarPACES 2009 : electricity, fuels and clean water powered by the sun ; 15 - 18 September 2009, Berlin, Germany ; the 15th SolarPACES conference ; proceedings
Y1  - 2009
SN  - 978-3-00-028755-8
PB  - Deutsches Zentrum für Luft- u. Raumfahrt
CY  - Stuttgart
ER  - 
TY  - JOUR
A1  - Herrmann, Ulf
A1  - Schwarzenbart, Marc
A1  - Dittmann-Gabriel, Sören
A1  - May, Martin
T1  - Hochtemperatur-Wärmespeicher für die Strom- und Wärmewende
JF  - Solarzeitalter : Politik, Kultur und Ökonomie erneuerbarer Energien
Y1  - 2019
SN  - 0937-3802
VL  - 31
IS  - 2
SP  - 18
EP  - 23
ER  - 
TY  - JOUR
A1  - Herrmann, Ulf
A1  - Schwarzenbart, Marc
A1  - Dittmann-Gabriel, Sören
T1  - Speicher statt Kohle. Integration thermischer Stromspeicher in vorhandene Kraftwerksstandorte
JF  - BWK : Das Energie-Fachmagazin
Y1  - 2019
SN  - 1436-4883
VL  - 71
IS  - 4
SP  - 42
EP  - 45
PB  - Springer-VDI-Verl.
CY  - Düsseldorf
ER  - 
TY  - CHAP
A1  - Herrmann, Ulf
A1  - Rheinländer, J.
A1  - Lippke, F.
ED  - Becker, Manfred
T1  - Solar Fields for Direct Steam Generation in Parabolic Trough Collectors
T2  - Components, tools, facilities and measurement techniques. - (Solar thermal concentrating technologies : proceedings of the 8th international symposium, October, 6 - 11, 1996, Köln, Germany ; Vol. 2)
Y1  - 1997
SN  - 3-7880-7616-X
SP  - 815
EP  - 834
PB  - Müller
CY  - Heidelberg
ER  - 
TY  - JOUR
A1  - Herrmann, Ulf
A1  - Nava, P.
T1  - Die Strahlung der Sonne einfangen
JF  - DLR-Nachrichten / Deutsches Zentrum für Luft- und Raumfahrt
Y1  - 2005
SN  - 0937-0420
VL  - 109
IS  - Sonderheft Solarforschung
SP  - 34
EP  - 37
ER  - 
TY  - JOUR
A1  - Herrmann, Ulf
A1  - Lippke, F.
T1  - The influence of transients on the design of DSG solar fields
JF  - Journal de Physique IV : proceedings
Y1  - 1999
SN  - 2-86883-402-7
U6  - http://dx.doi.org/10.1051/jp4:1999377
SN  - 1764-7177 (Online)
SN  - 1155-4339 (Print)
VL  - 9
IS  - PR3
SP  - 489
EP  - 494
ER  -