TY  - JOUR
A1  - Vogt, C.
A1  - Mottaghy, Darius
A1  - Wolf, A.
A1  - Rath, V.
A1  - Pechnig, R.
A1  - Clauser, C.
T1  - Reducing temperature uncertainties by stochastic geothermal reservoir modelling
JF  - Geophysical Journal International
N2  - Quantifying and minimizing uncertainty is vital for simulating technically and economically successful geothermal reservoirs. To this end, we apply a stochastic modelling sequence, a Monte Carlo study, based on (i) creating an ensemble of possible realizations of a reservoir model, (ii) forward simulation of fluid flow and heat transport, and (iii) constraining post-processing using observed state variables. To generate the ensemble, we use the stochastic algorithm of Sequential Gaussian Simulation and test its potential fitting rock properties, such as thermal conductivity and permeability, of a synthetic reference model and—performing a corresponding forward simulation—state variables such as temperature. The ensemble yields probability distributions of rock properties and state variables at any location inside the reservoir. In addition, we perform a constraining post-processing in order to minimize the uncertainty of the obtained distributions by conditioning the ensemble to observed state variables, in this case temperature. This constraining post-processing works particularly well on systems dominated by fluid flow. The stochastic modelling sequence is applied to a large, steady-state 3-D heat flow model of a reservoir in The Hague, Netherlands. The spatial thermal conductivity distribution is simulated stochastically based on available logging data. Errors of bottom-hole temperatures provide thresholds for the constraining technique performed afterwards. This reduce the temperature uncertainty for the proposed target location significantly from 25 to 12 K (full distribution width) in a depth of 2300 m. Assuming a Gaussian shape of the temperature distribution, the standard deviation is 1.8 K. To allow a more comprehensive approach to quantify uncertainty, we also implement the stochastic simulation of boundary conditions and demonstrate this for the basal specific heat flow in the reservoir of The Hague. As expected, this results in a larger distribution width and hence, a larger, but more realistic uncertainty estimate. However, applying the constraining post-processing the uncertainty is again reduced to the level of the post-processing without stochastic boundary simulation. Thus, constraining post-processing is a suitable tool for reducing uncertainty estimates by observed state variables.
Y1  - 2010
U6  - http://dx.doi.org/10.1111/j.1365-246X.2009.04498.x
SN  - 1365-246X
VL  - 181
IS  - 1
SP  - 321
EP  - 333
PB  - Oxford University Press
CY  - Oxford
ER  - 
TY  - CHAP
A1  - Reindl, Lukas
A1  - Park, Jin
A1  - Norda, Hannah
A1  - Butenweg, Christoph
T1  - Seismic design of masonry walls subject to out-of-plane bending
T2  - Proceedings of the Tenth International Conference on Computational Structures Technology : Valencia, Spain, 14 - 17 September 2010 / organised in association with: Universidad Politecnica de Valencia ... Ed. by B. H. V. Topping ...
Y1  - 2010
SN  - 978-1-905088-36-2
U6  - http://dx.doi.org/10.4203/ccp.93.348
SP  - Paper 348
PB  - Civil-Comp Press
CY  - Kippen
ER  - 
TY  - CHAP
A1  - Gellert, Christoph
A1  - Park, Jin
A1  - Butenweg, Christoph
T1  - Seismic safety verification of masonry structures
T2  - Proceedings of the Eight International Masonry Conference : held in Dresden from 4th to 7th of July 2010 / [International Masonry Society ; Technische Universität Dresden]. Ed. by: Wolfram Jäger ... Volume 1. (Masonry / International Masonry Society Special Publication ; 11)
Y1  - 2010
SN  - 978-3-00-031381-3
SP  - 813
EP  - 822
PB  - ARGE 8IMC Dresden
CY  - Radebeul
ER  - 
TY  - CHAP
A1  - Meskouris, Konstantin
A1  - Holtschoppen, Britta
A1  - Butenweg, Christoph
A1  - Park, Jin
T1  - Seismische Auslegung von Silo- und Tankbauwerken
T2  - Festschrift zum 60. Geburtstag von Univ.-Prof. Dr.-Ing. Ingbert Mangerig. (Berichte aus dem konstruktiven Ingenieurbau ; 2010,6)
Y1  - 2010
SP  - 215
EP  - 224
PB  - Univ. der Bundeswehr
CY  - Neubiberg
ER  - 
TY  - JOUR
A1  - Kern, Alexander
A1  - Frentzel, Ralf
A1  - Behrens, Jörg
T1  - Simulation of the transient voltages in the auxiliary power network of a large power plant in case of a direct lightning strike to the high-voltage overhead transmission line
Y1  - 2010
N1  - 30th International Conference on Lightning Protection, Cagliari (Italien), 2010
SP  - 749-1
EP  - 749-7
ER  - 
TY  - JOUR
A1  - Alexopoulos, Spiros
A1  - Hoffschmidt, Bernhard
T1  - Solar tower power plant in Germany and future perspectives of the development of the technology in Greece and Cyprus
JF  - Renewable Energy . 35 (2010), H. 7
Y1  - 2010
SN  - 0960-1481
SP  - 1352
EP  - 1356
ER  - 
TY  - JOUR
A1  - Alexopoulos, Spiros
A1  - Hoffschmidt, Bernhard
T1  - Solarthermische Kraftwerke mit thermischen Speichern
JF  - Chemie Ingenieur Technik. 82 (2010), H. 9
Y1  - 2010
SN  - 1522-2640
N1  - Special Issue: ProcessNet-Jahrestagung 2010 und 28. Jahrestagung der Biotechnologen V9.01 [Abstract des Vortrags]
SP  - 1606
EP  - 1606
ER  - 
TY  - CHAP
A1  - Goldbach, Daniel
A1  - Ament, Christoph
ED  - Scharff, Peter
T1  - Stabilized reversing with vehicle trailer combinations
T2  - Crossing borders within the ABC : automation, biomedical engineering and computer science; proceedings; 55. IWK Internationales Wissenschaftliches Kolloquium; 13 - 17 September 2010, Ilmenau
Y1  - 2010
SN  - 978-3-938843-53-6
SP  - 352
EP  - 357
PB  - Verl. ISLE
CY  - Ilmenau
ER  - 
TY  - BOOK
A1  - Hoffschmidt, Bernhard
A1  - Lan, Marco
A1  - Fricke, Barbara
A1  - Anthrakidis, Anette
A1  - Peter, Stefan
T1  - Struktur und Dynamik einer Stromversorgung mit einem hohen Anteil erneuerbarer Energieerzeuger. Kurzbezeichnung: Energiestudie. Schlussbericht
Y1  - 2010
N1  - BMU-Forschungsbericht. Bundesministerium für Umwelt, Naturschutz und Reaktorsicherheit / 2010 / 20110602205
PB  - Solar-Institut, FH Aachen
CY  - Jülich
ER  - 
TY  - JOUR
A1  - Geimer, Konstantin
A1  - Sauerborn, Markus
A1  - Hoffschmidt, Bernhard
A1  - Schmitz, Mark
A1  - Göttsche, Joachim
T1  - Test Facility for Absorber Specimens of Solar Tower Power Plants
JF  - Advances in Science and Technology. 74 (2010)
Y1  - 2010
N1  - 5th Forum on New Materials : CIMTEC 2010, Montecatini Terme, Italy 13-18 June 2010. Part C
SP  - 266
EP  - 271
ER  - 
TY  - CHAP
A1  - Park, Jin
A1  - Butenweg, Christoph
A1  - Reindl, Lukas
T1  - Untersuchung der Eignung von Ankerschienensystemen unter Erdbebeneinwirkungen
T2  - Conference proceedings / ANSYS Conference & 28th CADFEM Users´ Meeting 2010 : 3. - 5. November 2010, Eurogess Aachen / CADFEM; ANSYS
Y1  - 2010
SN  - 3-937523-07-3
SP  - Dokument 2.11.1
PB  - CADFEM [u.a.]
CY  - Grafing
ER  -