TY  - CHAP
A1  - Duran Paredes, Ludwin
A1  - Mottaghy, Darius
A1  - Herrmann, Ulf
A1  - Groß, Rolf Fritz
T1  - Online ground temperature and soil moisture monitoring of a shallow geothermal system with non-conventional components
T2  - EGU General Assembly 2020
N2  - We present first results from a newly developed monitoring station for a closed loop geothermal heat pump test installation at our campus, consisting of helix coils and plate heat exchangers, as well as an ice-store system. There are more than 40 temperature sensors and several soil moisture content sensors distributed around the system, allowing a detailed monitoring under different operating conditions.In the view of the modern development of renewable energies along with the newly concepts known as Internet of Things and Industry 4.0 (high-tech strategy from the German government), we created a user-friendly web application, which will connect the things (sensors) with the open network (www). Besides other advantages, this allows a continuous remote monitoring of the data from the numerous sensors at an arbitrary sampling rate.Based on the recorded data, we will also present first results from numerical simulations, taking into account all relevant heat transport processes.The aim is to improve the understanding of these processes and their influence on the thermal behavior of shallow geothermal systems in the unsaturated zone. This will in turn facilitate the prediction of the performance of these systems and therefore yield an improvement in their dimensioning when designing a specific shallow geothermal installation.
Y1  - 2020
N1  - EGU General Assembly 2020, Online, 4–8 May 2020
ER  - 
TY  - CHAP
A1  - Sattler, Johannes, Christoph
A1  - Chico Caminos, Ricardo Alexander
A1  - Ürlings, Nicolas
A1  - Dutta, Siddharth
A1  - Ruiz, Victor
A1  - Kalogirou, Soteris
A1  - Ktistis, Panayiotis
A1  - Agathokleous, Rafaela
A1  - Jung, Christian
A1  - Alexopoulos, Spiros
A1  - Atti, Vikrama Nagababu
A1  - Teixeira Boura, Cristiano José
A1  - Herrmann, Ulf
T1  - Operational experience and behaviour of a parabolic trough collector system with concrete thermal energy storage for process steam generation in Cyprus
T2  - AIP Conference Proceedings
N2  - As part of the transnational research project EDITOR, a parabolic trough collector system (PTC) with concrete thermal energy storage (C-TES) was installed and commissioned in Limassol, Cyprus. The system is located on the premises of the beverage manufacturer KEAN Soft Drinks Ltd. and its function is to supply process steam for the factory's pasteurisation process [1]. Depending on the factory's seasonally varying capacity for beverage production, the solar system delivers between 5 and 25 % of the total steam demand. In combination with the C-TES, the solar plant can supply process steam on demand before sunrise or after sunset. Furthermore, the C-TES compensates the PTC during the day in fluctuating weather conditions. The parabolic trough collector as well as the control and oil handling unit is designed and manufactured by Protarget AG, Germany. The C-TES is designed and produced by CADE Soluciones de Ingeniería, S.L., Spain. In the focus of this paper is the description of the operational experience with the PTC, C-TES and boiler during the commissioning and operation phase. Additionally, innovative optimisation measures are presented.
Y1  - 2020
U6  - https://doi.org/10.1063/5.0029278
N1  - SOLARPACES 2019: International Conference on Concentrating Solar Power and Chemical Energy Systems, 1–4 October 2019, Daegu, South Korea
IS  - 2303
SP  - 140004-1
EP  - 140004-10
ER  - 
TY  - CHAP
A1  - Mohan, Nijanthan
A1  - Groß, Rolf Fritz
A1  - Menzel, Karsten
A1  - Theis, Fabian
T1  - Opportunities and Challenges in the Implementation of Building Information Modeling for Prefabrication of Heating, Ventilation and Air Conditioning Systems in Small and Medium-Sized Contracting Companies in Germany – A Case Study
T2  - WIT Transactions on The Built Environment, Vol. 205
N2  - Even though BIM (Building Information Modelling) is successfully implemented in most of the world, it is still in the early stages in Germany, since the stakeholders are sceptical of its reliability and efficiency. The purpose of this paper is to analyse the opportunities and obstacles to implementing BIM for prefabrication. Among all other advantages of BIM, prefabrication is chosen for this paper because it plays a vital role in creating an impact on the time and cost factors of a construction project. The project stakeholders and participants can explicitly observe the positive impact of prefabrication, which enables the breakthrough of the scepticism factor among the small-scale construction companies. The analysis consists of the development of a process workflow for implementing prefabrication in building construction followed by a practical approach, which was executed with two case studies. It was planned in such a way that, the first case study gives a first-hand experience for the workers at the site on the BIM model so that they can make much use of the created BIM model, which is a better representation compared to the traditional 2D plan. The main aim of the first case study is to create a belief in the implementation of BIM Models, which was succeeded by the execution of offshore prefabrication in the second case study. Based on the case studies, the time analysis was made and it is inferred that the implementation of BIM for prefabrication can reduce construction time, ensures minimal wastes, better accuracy, less problem-solving at the construction site. It was observed that this process requires more planning time, better communication between different disciplines, which was the major obstacle for successful implementation. This paper was carried out from the perspective of small and medium-sized mechanical contracting companies for the private building sector in Germany.
KW  - building information modelling
KW  - HVAC
KW  - prefabrication
KW  - construction
KW  - small and medium scaled companies
Y1  - 2021
U6  - https://doi.org/10.2495/BIM210101
SN  - 1743-3509
N1  - 4th International Conference on Building Information Modelling (BIM) in Design, Construction and Operations, 1–3 September 2021. Santiago de Compostela, Spain
SP  - 117
EP  - 126
PB  - WIT Press
CY  - Southampton
ER  - 
TY  - CHAP
A1  - Hoffschmidt, Bernhard
A1  - Telle, R.
A1  - Sauerborn, Markus
A1  - Wagner, M.
T1  - Optical measurement system for high temperature absorbers
T2  - SolarPACES 2011 : concentrating solar power and chemical energy systems : 20 - 23 September, 2011, Granada, Spain
Y1  - 2011
CY  - Granada
ER  - 
TY  - CHAP
A1  - Alexopoulos, Spiros
A1  - Breitbach, Gerd
A1  - Hoffschmidt, Bernhard
T1  - Optimization of the channel form geometry of porous ReSiC ceramic membrane modules
T2  - Proceedings / International Conference & Exhibition for Filtration and Separation Technology, FILTECH 2009 : October 13 - 15, 2009, Wiesbaden, Germany. Vol. 2
Y1  - 2009
SN  - 978-3-941655-36-2
SP  - 686
EP  - 693
PB  - Filtech Exhibitions Germany
CY  - Meerbusch
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  - CHAP
A1  - Gall, J.
A1  - Abel, D.
A1  - Ahlbrink, N.
A1  - Andersson, J.
A1  - Diehl, M.
A1  - Pitz-Paal, R.
A1  - Schmitz, M.
A1  - Teixeira Boura, Cristiano José
T1  - Optimized control of hot-gas cycle for solar thermal power plants
T2  - Proceedings of the 7th International Modelica Conference : Como, Italy, 20-22 September 2009 / Francesco Casella, ed.
Y1  - 2009
SN  - 978-91-7393-513-5
SP  - 490
EP  - 495
PB  - The Modelica Association
ER  - 
TY  - CHAP
A1  - Warerkar, S.
A1  - Schmitz, S.
A1  - Göttsche, Joachim
A1  - Hoffschmidt, Bernhard
A1  - Tamme, R.
T1  - Performance analysis of an air-sand heat exchanger prototype for high-temperature storage
T2  - EuroSun 2008 : 1st International Conference on Solar Heating, Cooling and Buildings ; 7th - 10th October 2008, Lisbon, Portugal : key lectures / ISES, International Solar Energy Society. Vol. 1
Y1  - 2008
SN  - 978-1-61782-228-5
SP  - 2215
EP  - 2222
PB  - Sociedade Portuguesa De Energia Solar (SPES)
CY  - Lissabon
ER  - 
TY  - CHAP
A1  - Herrmann, Ulf
A1  - Graeter, F.
A1  - Nava, P.
ED  - Ramos, C.
T1  - Performance of the SKAL-ET Collector Loop at KJC Operating Company
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  - Baumann, Torsten
A1  - Teixeira Boura, Cristiano José
A1  - Eckstein, Julian
A1  - Dabrowski, Jan
A1  - Göttsche, Joachim
A1  - Hoffschmidt, Bernhard
A1  - Schmitz, Stefan
A1  - Zunft, Stefan
T1  - Properties of bulk materials for high-temperature air-sand heat exchangers
T2  - 30th ISES Biennial Solar World Congress 2011 : Kassel, Germany, 28 August - 2 September 2011. Vol. 2
Y1  - 2012
SN  - 978-1-61839-364-7
SP  - 1270
EP  - 1278
PB  - Curran
CY  - Red Hook, NY
ER  - 
TY  - CHAP
A1  - Meliß, Michael
A1  - Neskakis, A.
A1  - Usbeck, S.
A1  - Vogelsang, E.
A1  - Wagner, L.
A1  - Wiediger, Jürgen
T1  - PV-transmitter and receiver
T2  - Harmony with nature : : proceedings / ISES Solar World Congress, Budapest 1993. International Solar Energy Society, Hungarian Section (H-ISES); Hungarian Solar Energy Society (HSES). Vol. 3: Photovoltaics
Y1  - 1992
SP  - 375
EP  - 380
PB  - Hungarian Energy Society
CY  - Budapest
ER  - 
TY  - CHAP
A1  - Rendon, Carlos
A1  - Dieckmann, Simon
A1  - Weidle, Mathias
A1  - Dersch, Jürgen
A1  - Teixeira Boura, Cristiano José
A1  - Polklas, Thomas
A1  - Kuschel, Marcus
A1  - Herrmann, Ulf
T1  - Retrofitting of existing parabolic trough collector power plants with molten salt tower systems
T2  - AIP Conference Proceedings
Y1  - 2018
U6  - https://doi.org/10.1063/1.5067030
VL  - 2033
IS  - 1
SP  - 030014-1
EP  - 030014-8
ER  - 
TY  - CHAP
A1  - Alexopoulos, Spiros
A1  - Kluczka, Sven
A1  - Vaeßen, Christiane
A1  - Roeb, M.
A1  - Neises, M.
T1  - Scenario development for efficient methanol production using CO2 and solar energy
T2  - Eurosun 2012 : Solar energy for a brighter future : conference proceedings : Rijeka, 18.-22.09.2012
Y1  - 2012
SP  - ID 99
CY  - Rijeka
ER  - 
TY  - CHAP
A1  - Gall, J.
A1  - Abel, Dirk
A1  - Ahlbrink, N.
A1  - Pitz-Paal, R.
A1  - Andersson, J.
A1  - Diehl, M.
A1  - Teixeira Boura, Cristiano José
A1  - Schmitz, M.
A1  - Hoffschmidt, Bernhard
T1  - Simulation and control of solar thermal power plants
T2  - International Conference on Renewable Energies and Power Quality : ICREPQ '10 : Granada 23rd - 25th March 2010
Y1  - 2010
SP  - 1
EP  - 5
ER  - 
TY  - CHAP
A1  - Schwarzer, Klemens
A1  - Hafner, B.
A1  - Meer, A. von
A1  - Krings, T.
T1  - Simulation and dimensioning program for solar cookers with temporal heat storage and comparison with measurements
T2  - Harmony with nature : : proceedings / ISES Solar World Congress, Budapest 1993. International Solar Energy Society, Hungarian Section (H-ISES); Hungarian Solar Energy Society (HSES). Bd 5: Active systems
Y1  - 1993
SP  - 473
EP  - 478
PB  - Hungarian Energy Society
CY  - Budapest
ER  - 
TY  - CHAP
A1  - Achenbach, Timm
A1  - Geimer, K.
A1  - Göttsche, Joachim
A1  - Hoffschmidt, Bernhard
A1  - Lynen, A.
A1  - Bauer, J.
T1  - Simulation and flow measurements of volumetric high temperature absorbers for solar tower power plants
T2  - SolarPACES 2011 : concentrating solar power and chemical energy systems : 20 - 23 September, 2011, Granada, Spain
Y1  - 2011
CY  - Granada
ER  - 
TY  - CHAP
A1  - Alexopoulos, Spiros
A1  - Hoffschmidt, Bernhard
A1  - Rau, Christoph
A1  - Sattler, Johannes, Christoph
T1  - Simulation of hybrid solar tower power plants
T2  - 30th ISES Biennial Solar World Congress 2011 : Kassel, Germany, 28 August - 2 September 2011. Vol. 5
Y1  - 2012
SP  - 4044
EP  - 4050
PB  - Curran
CY  - Red Hook, NY
ER  - 
TY  - CHAP
A1  - Achenbach, Timm
A1  - Geimer, Konstantin
A1  - Lynen, Arthur
A1  - Göttsche, Joachim
A1  - Hoffschmidt, Bernhard
T1  - Simulation of thermo-mechanical processes in open volumetric absorber modules
T2  - SolarPaces 2012 : concentrating solar power and chemical energy systems : Sept. 11 - 14 2012, Marrakech, Marokko
Y1  - 2012
SP  - 1
EP  - 8
ER  - 
TY  - CHAP
A1  - Alexopoulos, Spiros
A1  - Hoffschmidt, Bernhard
A1  - Rau, Christoph
A1  - Schwarzbözl, Peter
T1  - Simulation results for a hybridization concept of a small solar tower power plant
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  - 9783000287558
PB  - Deutsches Zentrum f. Luft- u. Raumfahrt
CY  - Stuttgart
ER  - 
TY  - CHAP
A1  - Alexopoulos, Spiros
A1  - Hoffschmidt, Bernhard
A1  - Rau, Christoph
A1  - Schmitz, M.
A1  - Schwarzbözl, P.
A1  - Pomp, Stefan
T1  - Simulation results for a hybridized operation of a gas turbine or a burner for a small solar tower power plant
T2  - SolarPACES 2010 : the CSP Conference: electricity, fuels and clean water from concentrated solar energy ; 21 to 24 September 2010, Perpignan, France
Y1  - 2010
SP  - 82
EP  - 83
PB  - Soc. OSC
CY  - Saint Maur
ER  -