TY  - JOUR
A1  - Kuperjans, Isabel
A1  - Gürzenich, D.
A1  - Roosen, P.
T1  - Kostenfunktionen im WWW : Unterstützung der Auslegung energietechnischer Anlagen und deren Verschaltungen
JF  - Gaswärme international (GWI)
Y1  - 2005
SN  - 0020-9384
VL  - 54
IS  - 1
SP  - 19
EP  - 21
ER  - 
TY  - JOUR
A1  - Pauksztat, Anja
A1  - Kuperjans, Isabel
A1  - Meyer, Jörg
T1  - Produktbezogene Referenzwerte für Energieeffizienz und CO2-Emissionen
JF  - Energiewirtschaftliche Tagesfragen : et ; Zeitschrift für Energiewirtschaft, Recht, Technik und Umwelt
Y1  - 2005
SN  - 0013-743X
SN  - 0720-6240
VL  - 55
IS  - 6
SP  - 374
EP  - 376
ER  - 
TY  - CHAP
A1  - Augenstein, Eckardt
A1  - Kuperjans, Isabel
A1  - Lucas, K.
ED  - Tsatsaronis,, Georgios
T1  - EUSEBIA - Decision-Support-System for Technical, Economical and Ecological Design and Evaluation of Industrial Energy Systems
T2  - ECOS 2002 : proceedings of the 15th International Conference on Efficiency, Costs, Optimization, Simulation and Environmental Impact of Energy Systems, Berlin, Germany July 3 - 5, 2002. - Vol. 1
Y1  - 2002
SN  - 3-00-009533-0
SP  - 446
EP  - 453
PB  - Techn. Univ., Inst. for Energy Engineering
CY  - Berlin
ER  - 
TY  - CHAP
A1  - Augenstein, Eckardt
A1  - Herbergs, S.
A1  - Kuperjans, Isabel
A1  - Lucas, K.
ED  - Kjelstrup, Signe
T1  - Simulation of industrial energy supply systems with integrated cost optimization
T2  - Proceedings of ECOS 2005, the 18th International Conference on Efficiency, Cost, Optimization, Simulation, and Environmental Impact of Energy Systems : Trondheim, Norway, June 20 - 22, 2005. - Vol. 2
Y1  - 2005
SN  - 82-519-2041-8
N1  - CD-ROM-Ausg. u.d.T.: Shaping our future energy systems
SP  - 627
EP  - 634
PB  - Tapir Academic Press
CY  - Trondheim
ER  - 
TY  - CHAP
A1  - Kuperjans, Isabel
A1  - Augenstein, Eckardt
T1  - „EUSEBIA – Software zur Analyse und Verbesserung der betrieblichen Energiewirtschaft
T2  - Optimierung in der Energieversorgung : Tagung Veitshöchheim, 9. und 10. Oktober 2001. - (VDI-Berichte ; 1627)
Y1  - 2001
SN  - 3-18-091627-3
SP  - 267
EP  - 268
PB  - VDI-Verl.
CY  - Düsseldorf
ER  - 
TY  - CHAP
A1  - Augenstein, Eckardt
A1  - Kuperjans, Isabel
T1  - Softwaregestützte Analyse und Konzeption betrieblicher Energieversorgungsanlagen
T2  - Fortschrittliche Energiewandlung und -anwendung : Schwerpunkt: dezentrale Energiesysteme ; Tagung Bochum, 13. und 14. März 2001. - (VDI-Berichte ; 1594)
Y1  - 2001
SN  - 3-18-091594-3
SP  - 313
EP  - 322
PB  - VDI-Verl.
CY  - Düsseldorf
ER  - 
TY  - CHAP
A1  - Knoche, K. F.
A1  - Kruska, Martin
A1  - Weber, P.
A1  - Kuperjans, Isabel
ED  - Schulz, Werner F.
T1  - Energiemanagement
T2  - Lexikon Nachhaltiges Wirtschaften. - (Lehr- und Handbücher zur ökologischen Unternehmensführung und Umweltökonomie)
Y1  - 2001
SN  - 3-486-24523-6
SP  - 88
EP  - 92
PB  - Oldenbourg
CY  - München [u.a.]
ER  - 
TY  - CHAP
A1  - Kern, Alexander
T1  - Die neue DIN EN 62305-2 (VDE 0185-305-2) Ed.2:2013-02 - Änderungen zur Ed.l und zugehörige Beiblätter
T2  - 10. VDE, VBB-Blitzschutztagung : Vorträge der 10. VDE, ABB-Fachtagung vom 24. bis 25. Oktober 2013 in Neu-Ulm. (VDE-Fachbericht ; 70)
Y1  - 2013
SN  - 978-3-8007-3540-2
SP  - 9
EP  - 16
PB  - VDE-Verl.
CY  - Berlin
ER  - 
TY  - CHAP
A1  - Scheibe, K.
A1  - Kern, Alexander
T1  - Stand der Normung für Überspannungsschutzgeräte
T2  - 10. VDE, VBB-Blitzschutztagung : Vorträge der 10. VDE, ABB-Fachtagung vom 24. bis 25. Oktober 2013 in Neu-Ulm. (VDE-Fachbericht ; 70)
Y1  - 2013
SN  - 978-3-8007-3540-2
SP  - 23
EP  - 27
PB  - VDE-Verl.
CY  - Berlin
ER  - 
TY  - CHAP
A1  - Kaspar, K.
A1  - Groebel, Simone
A1  - Kuperjans, Isabel
A1  - Dielmann, Klaus-Peter
A1  - Selmer, Thorsten
T1  - Charakterisierung der Biozönose von Biogasfermentern in Abhängigkeit verschiedener Substrate
T2  - Biogas 2013 : 6. Innovationskongress, 23. - 24.05.2013, Osnabrück, Tagungsband
Y1  - 2013
SN  - 978-3-9813776-3-7
SP  - 69
EP  - 74
PB  - Profair Consult+Project
CY  - Hildesheim
ER  - 
TY  - CHAP
A1  - Küppers, Christine
A1  - Groebel, Simone
A1  - Kuperjans, Isabel
A1  - Dielmann, Klaus-Peter
T1  - Molekulargenetische Analysen zur Optimierung der Biogasgewinnung
T2  - Biogas 2011 : 4. Innovationskongress ; Effizienzsteigerung von Biogasanlagen ; Vorstellung der 17 besten Biogas-Innovationen der letzten 12 Monate ; 12. - 13. Mai 2011, im ZUK der Deutschen Bundesstiftung Umwelt ; Tagungsband
Y1  - 2011
SN  - 978-3-9813776-1-3
SP  - 45
EP  - 48
PB  - Profair Consult+Project
CY  - Hildesheim
ER  - 
TY  - THES
A1  - Groebel, Simone
T1  - Zusammensetzung der Biozönose der Methanbildung unter Anwendung molekularbiologischer Methoden : Auswahl und Immobilisierung eines prozesstragenden Organismus auf einem Biosensor mit dem Ziel der Überwachung der Prozessstabilität kommerzieller Biogasanlagen
Y1  - 2013
N1  - Diss., Univ., Mathematisch-Naturwiss. Fak., Rostock, 2013
PB  - Univ.-Bibliothek
CY  - Rostock
ER  - 
TY  - CHAP
A1  - Pauksztat, Anja
A1  - Kuperjans, Isabel
A1  - de Hesselle, M.
T1  - Referenzformeln für Energiebedarf und CO2-Emissionen in der Glasindustrie
T2  - Energieeffizienz - Chancen für die Zukunft : Tagung Berlin, 14. und 15. November 2006. - (VDI-Berichte ; 1951)
Y1  - 2006
SN  - 3-18-091951-5
SP  - 179
EP  - 190
PB  - VDI-Verl.
CY  - Düsseldorf
ET  - Nichtred. Ms.-Dr.
ER  - 
TY  - JOUR
A1  - Kuperjans, Isabel
T1  - Gute Planung ist alles : Energieeffizienz in der Pharmaproduktion
JF  - Pharma + Food
Y1  - 2011
SN  - 1434-8942
VL  - 2011
IS  - 2
SP  - 8
EP  - 10
PB  - Hüthig
CY  - Heidelberg
ER  - 
TY  - JOUR
A1  - Augenstein, Eckardt
A1  - Herbergs, S.
A1  - Kuperjans, Isabel
T1  - TOP-Energy : ein Werkzeug zur Optimierung der Gebäudeenergieversorgung
JF  - KI : Kälte, Luft, Klimatechnik
Y1  - 2006
SN  - 1865-5432
IS  - 5
SP  - 198
EP  - 201
ER  - 
TY  - THES
A1  - Kuperjans, Isabel
T1  - Verfahren zur Analyse und Bewertung industrieller Energieanlagen
Y1  - 2000
N1  - Aachen, Techn. Hochsch., Diss., 2000
CY  - Aachen
ER  - 
TY  - JOUR
A1  - Kuperjans, Isabel
A1  - Starke, M.
A1  - Esser, J.
A1  - [u.a.], 
T1  - Analyse und Konzeption von Energieanlagen unter ökologischen, wirtschaftlichen und technischen Gesichtspunkten
JF  - WLB : Umwelttechnik für Industrie und Kommune
Y1  - 2000
SN  - 0341-2679
VL  - 44
IS  - 11/12
SP  - 26
EP  - 29
ER  - 
TY  - JOUR
A1  - Kuperjans, Isabel
A1  - Esser, J.
A1  - Meyer, Jörg
A1  - Donner, O.
T1  - Gestaltung und Bewertung von Energieanlagen unter ökologischen, wirtschaftlichen und technischen Gesichtspunkten
JF  - Umweltwirtschaftsforum : UWF
Y1  - 2000
SN  - 0943-3481
VL  - 8
IS  - 3
SP  - 53
EP  - 58
ER  - 
TY  - CHAP
A1  - Kuperjans, Isabel
A1  - Terpitz, J.
A1  - Terruhn, H.
A1  - Wilhelm, H.-G.
T1  - Simulation zur Konzeption und Analyse betrieblicher und kommunaler Nahwärmesysteme
T2  - Betriebliches Energiemanagement : Tagung Cottbus, 30. und 31. März 1999. - (VDI-Berichte ; 1462)
Y1  - 1999
SN  - 3-18-091462-9
SP  - 195
EP  - 204
PB  - VDI-Verl.
CY  - Düsseldorf
ER  - 
TY  - CHAP
A1  - Kruska, Martin
A1  - Kuperjans, Isabel
T1  - Análisis Thermodinámicos : [Capítulo 3.3]
T2  - Uso racional de energía : eficiencia energética y energías renovables. - (Manual para consultores y expertos)
Y1  - 1999
SP  - 3.3-1
EP  - 3.3-15
PB  - Ministerio de Energía y Minas
CY  - Lima
ER  - 
TY  - CHAP
A1  - Kuperjans, Isabel
A1  - Seitz, C.-W.
A1  - Wilhelm, H.-G.
T1  - Realisierung einer Fernwärmeversorgung mit Kraft-Wärme-Kopplung für den Wohnwertpark Brühl
T2  - Energiemanagement in Kommunen und öffentlichen Einrichtungen : Tagung Stuttgart, 16. und 17. September 1998. - (VDI-Berichte ; 1424)
Y1  - 1998
SN  - 3-18-091424-6
SP  - 129
EP  - 138
PB  - VDI-Verl.
CY  - Düsseldorf
ER  - 
TY  - CHAP
A1  - Kuperjans, Isabel
A1  - Schreiber, M.
A1  - Determann, L.
A1  - Schreiber, R.
T1  - Entscheidungsunterstützung bei der Gestaltung der betrieblichen Energieversorgung und -nutzung
T2  - Innovationen bei der rationellen Energieanwendung : neue Chancen für die Wirtschaft ; Tagung Dortmund, 3. und 4. März 1998. - (VDI-Berichte ; 1385)
Y1  - 1998
SN  - 3-18-091385-1
SP  - 79
EP  - 94
PB  - VDI-Verl.
CY  - Düsseldorf
ER  - 
TY  - CHAP
A1  - Augenstein, Eckardt
A1  - Gürzenich, D.
A1  - Kuperjans, Isabel
A1  - Wrobel, G.
T1  - TOP-Energy : softwaregestützte Analyse und Optimierung industrieller Energieversorgungssysteme
T2  - Entwicklungslinien der Energietechnik 2004
Y1  - 2004
N1  - Themengebiet Energiesysteme
PB  - VDI
CY  - Düsseldorf
ET  - CD-ROM-Ausg.
ER  - 
TY  - CHAP
A1  - Bouvy, C.
A1  - Kuperjans, Isabel
T1  - Mikro-Gasturbinen : eine neue Technologie zur Kraft-Wärme-Kopplung in kleinen und mittleren Unternehmen
T2  - Entwicklungslinien der Energietechnik 2004
Y1  - 2004
N1  - Themengebiet Rationelle Energieverwendung
PB  - VDI-Verlag
CY  - Düsseldorf
ET  - CD-ROM-Ausg.
ER  - 
TY  - JOUR
A1  - Kuperjans, Isabel
T1  - Exergetische und exergoökonomische Analyse thermischer Prozesse
JF  - Arbeitsbericht / Institut für Wirtschaftswissenschaften, Rheinisch-Westfälische Technische Hochschule Aachen
Y1  - 1996
IS  - 06
ER  - 
TY  - THES
A1  - Betsch, Matthias
T1  - Umbau einer Mikroturbine zu einer extern befeuerten Maschine mit Ankopplung an eine Stationäre-Wirbelschichtfeuerung
Y1  - 2009
U6  - http://nbn-resolving.de/urn/resolver.pl?nbn:de:gbv:28-diss2009-0166-9
N1  - Diss., Univ. Rostock, 2009
PB  - Univ. Rostock, Fakultät für Maschinenbau und Schiffstechnik
CY  - Rostock
ER  - 
TY  - JOUR
A1  - Alebouyeh Samami, Behzad
A1  - Pieper, Martin
A1  - Breitbach, Gerd
A1  - Hodapp, Josef
T1  - Heat production in the windings of the stators of electric machines under stationary condition
JF  - Heat and mass transfer
N2  - In electric machines due to high currents and resistive losses (joule heating) heat is produced. To avoid damages by overheating the design of effective cooling systems is required. Therefore the knowledge of heat sources and heat transfer processes is necessary. The purpose of this paper is to illustrate a good and effective calculation method for the temperature analysis based on homogenization techniques. These methods have been applied for the stator windings in a slot of an electric machine consisting of copper wires and resin. The key quantity here is an effective thermal conductivity, which characterizes the heterogeneous wire resin-arrangement inside the stator slot. To illustrate the applicability of the method, the analysis of a simplified, homogenized model is compared with the detailed analysis of temperature behavior inside a slot of an electric machine according to the heat generation. We considered here only the stationary situation. The achieved numerical results are accurate and show that the applied homogenization technique works in practice. Finally the results of simulations for the two cases, the original model of the slot and the homogenized model chosen for the slot (unit cell), are compared to experimental results.
Y1  - 2014
U6  - https://doi.org/10.1007/s00231-014-1371-8
SN  - 0947-7411 (Print) ; 1432-1181 (E-Journal)
VL  - 50
SP  - 1707
EP  - 1716
PB  - Springer
CY  - Heidelberg
ER  - 
TY  - CHAP
A1  - Augenstein, Eckardt
A1  - Herbergs, S.
A1  - Kuperjans, Isabel
T1  - TOP-Energy : softwaregestützte Analyse und Optimierung industrieller Energieversorgungssysteme ; Postershow
T2  - Optimierung in der Energiewirtschaft : Tagung Stuttgart, 27. und 28. Oktober 2005. - (VDI-Berichte ; 1908)
Y1  - 2005
SN  - 3-18-091908-6
SP  - 279
EP  - 282
PB  - VDI-Verl.
CY  - Düsseldorf
ER  - 
TY  - CHAP
A1  - Goldbach, Daniel
ED  - Wahl, Michael
T1  - Diagnosemaßnahmen im Umfeld der Funktionalen Sicherheit
T2  - AmE 2014 - Automotive meets electronics [Elektronische Ressource] : Beiträge der 5. GMM-Fachtagung vom 18. bis 19. Februar 2014 in Dortmund / Veranst.: VDE/VDI-Gesellschaft Mikroelektronik, Mikrosystem- und Feinwerktechnik (GMM)
Y1  - 2014
SN  - 978-3-8007-3580-8
N1  - GMM-Fachbericht ; 78
SP  - 172
EP  - 179
PB  - VDE-Verl.
CY  - Berlin
ER  - 
TY  - JOUR
A1  - Jildeh, Zaid B.
A1  - Wagner, Torsten
A1  - Schöning, Michael Josef
A1  - Pieper, Martin
T1  - Simulating the electromagnetic‐thermal treatment of thin aluminium layers for adhesion improvement
JF  - Physica status solidi (a)
N2  - A composite layer material used in packaging industry is made from joining layers of different materials using an adhesive. An important processing step in the production of aluminium-containing composites is the surface treatment and consequent coating of adhesive material on the aluminium surface. To increase adhesion strength between aluminium layer and the adhesive material, the foil is heat treated. For efficient heating, induction heating was considered as state-of-the-art treatment process. Due to the complexity of the heating process and the unpredictable nature of the heating source, the control of the process is not yet optimised. In this work, a finite element analysis of the process was established and various process parameters were studied. The process was simplified and modelled in 3D. The numerical model contains an air domain, an aluminium layer and a copper coil fitted with a magnetic field concentrating material. The effect of changing the speed of the aluminium foil (or rolling speed) was studied with the change of the coil current. Statistical analysis was used for generating a general control equation of coil current with changing rolling speed.
Y1  - 2015
U6  - https://doi.org/10.1002/pssa.201431893
SN  - 1862-6319
VL  - Vol. 212
IS  - 6
SP  - 1234
EP  - 1241
PB  - Wiley
CY  - Weinheim
ER  - 
TY  - JOUR
A1  - Mottaghy, Darius
A1  - Pechnig, Renate
A1  - Taugs, Renate
A1  - Kröger, Jens
A1  - Thomsen, Claudia
A1  - Hesse, Fabian
A1  - Liebsch-Doerschner, Thomas
T1  - Erstellung eines geothermischen Modells für Teile Hamburgs und anliegende Gebiete
JF  - BBR - Fachmagazin für Brunnen- und Leitungsbau
Y1  - 2010
SN  - 1611-1478
VL  - 61
IS  - 12
SP  - 52
EP  - 59
PB  - WVGW Wirtschafts- u. Verl.Ges. Gas und Wasser
CY  - Bonn
ER  - 
TY  - JOUR
A1  - Berg, Milena
A1  - Angerer, Anita
A1  - Martinelli, Walter
A1  - Hammer, Stephan
A1  - Mottaghy, Darius
T1  - Erkundung des geothermischen Potenzials eines ehemaligen Untertagebergbaus
JF  - BBR - Fachmagazin für Brunnen- und Leitungsbau
Y1  - 2013
VL  - 64
IS  - 6
SP  - 46
EP  - 52
ER  - 
TY  - CHAP
A1  - Mottaghy, Darius
A1  - Majorowicz, Jacek
A1  - Rath, Volker
T1  - Ground Surface Temperature Histories Reconstructed from Boreholes in Poland: Implications for Spatial Variability
T2  - The Polish Climate in the European Context: An Historical Overview
Y1  - 2009
SN  - 978-90-481-3167-9
U6  - https://doi.org/10.1007/978-90-481-3167-9_17
SP  - 375
EP  - 387
PB  - Springer Science+Business Media
CY  - Dordrecht
ER  - 
TY  - JOUR
A1  - Mottaghy, Darius
A1  - Pechnig, Renate
A1  - Vogt, Christian
T1  - The geothermal project Den Haag: 3D numerical models for temperature prediction and reservoir simulation
JF  - Geothermics
N2  - The proposed Den Haag Zuidwest district heating system of the city of The Hague consists of a deep doublet in a Jurassic sandstone layer that is designed for a production temperature of 75 °C and a reinjection temperature of 40 °C at a flow rate of 150 m3 h−1. The prediction of reservoir temperature and production behavior is crucial for success of the proposed geothermal doublet. This work presents the results of a study of the important geothermal and geohydrological issues for the doublet design. In the first phase of the study, the influences of the three-dimensional (3D) structures of anticlines and synclines on the temperature field were examined. A comprehensive petrophysical investigation was performed to build a large scale 3D-model of the reservoir. Several bottomhole temperatures (BHTs), as well as petrophysical logs were used to calibrate the model using thermal conductivity measurements on 50 samples from boreholes in different lithological units in the study area. Profiles and cross sections extracted from the calculated temperature field were used to study the temperature in the surrounding areas of the planned doublet. In the second phase of the project, a detailed 3D numerical reservoir model was set up, with the aim of predicting the evolution of the producer and injector temperatures, and the extent of the cooled area around the injector. The temperature model from the first phase provided the boundary conditions for the reservoir model. Hydraulic parameters for the target horizons, such as porosity and permeability, were taken from data available from the nearby exploration wells. The simulation results are encouraging as no significant thermal breakthrough is predicted. For the originally planned location of the producer, the extracted water temperature is predicted to be around 79 °C, with an almost negligible cooling in the first 50 years of production. When the producer is located shallower parts of the reservoir, the yield water temperatures is lower, starting at ≈76 °C and decreasing to ≈74 °C after 50 years of operation. This comparatively larger decrease in temperature with time is caused by the structural feature of the reservoir, namely a higher dip causes the cooler water to easily move downward. In view of the poor reservoir data, the reservoir simulation model is constructed to allow iterative updates using data assimilation during planned drilling, testing, and production phases. Measurements during an 8 h pumping test carried out in late 2010 suggest that a flow rate of 150 m3 h−1 is achievable. Fluid temperatures of 76.5 °C were measured, which is very close to the predicted value.
Y1  - 2011
U6  - https://doi.org/10.1016/j.geothermics.2011.07.001
SN  - 0375-6505
VL  - 40
IS  - 3
SP  - 199
EP  - 210
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Kürten, Sylvia
A1  - Mottaghy, Darius
A1  - Ziegler, Martin
T1  - Wärmeübergangswiderstand bei flächigen thermo-aktiven Bauteilen am Beispiel thermo-aktiver Abdichtungselemente
JF  - Bautechnik
Y1  - 2013
U6  - https://doi.org/10.1002/bate.201300035
SN  - 1437-0999
VL  - 90
IS  - 7
SP  - 387
EP  - 394
PB  - Ernst & Sohn
CY  - Berlin
ER  - 
TY  - JOUR
A1  - Mottaghy, Darius
A1  - Schwamborn, G.
A1  - Rath, V.
T1  - Past climate changes and permafrost depth at the Lake El'gygytgyn site: implications from data and thermal modeling
JF  - Climate of the Past
Y1  - 2013
U6  - https://doi.org/10.5194/cp-9-119-2013
SN  - 1814-9332
VL  - 9
IS  - 1
SP  - 119
EP  - 133
PB  - Copernicus
CY  - Katlenburg-Lindau
ER  - 
TY  - JOUR
A1  - Vogt, Christian
A1  - Iwanowski-Strahser, Katha
A1  - Marquart, Gabriele
A1  - Arnold, Juliane
A1  - Mottaghy, Darius
A1  - Pechnig, Renate
A1  - Gnjezda, Daniel
A1  - Clauser, Christoph
T1  - Modeling contribution to risk assessment of thermal production power for geothermal reservoirs
JF  - Renewable Energy
Y1  - 2013
U6  - https://doi.org/10.1016/j.renene.2012.11.026
SN  - 0960-1481
VL  - 53
SP  - 230
EP  - 241
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - CHAP
A1  - Ziegler, M.
A1  - Schüller, R.
A1  - Mottaghy, Darius
T1  - Numerical simulation of energy consumption of artificial ground freezing applications subject to water seepage
T1  - Simulation numérique de la consummation d´énergie des applications pour la congélation artificielle du sol soumise au flux de l´eau souterraine
T2  - Proceedings of the 18th International Conference on Soil Mechanics and Geotechnical Engineering, Paris 2013
Y1  - 2013
SP  - 2985
EP  - 2988
ER  - 
TY  - JOUR
A1  - Kürten, Sylvia
A1  - Mottaghy, Darius
A1  - Ziegler, Martin
T1  - Planung, Auslegung und Dimensionierung von thermo-aktiven Bauteilen am Beispiel thermo-aktiver Abdichtungselemente
JF  - Geothermie, Bohr- und Brunnentechnik
Y1  - 2014
SP  - 18
EP  - 20
PB  - Ernst & Sohn
CY  - Berlin
ER  - 
TY  - JOUR
A1  - Mottaghy, Darius
A1  - Schellschmidt, R.
A1  - Popov, Y. A.
A1  - Clauser, C.
A1  - Kukkonen, I. T.
A1  - Nover, G.
A1  - Milanovsky, S.
A1  - Romushkevich, R. A.
T1  - New heat flow data from the immediate vicinity of the Kola super-deep borehole: Vertical variation in heat flow density confirmed and attributed to advection
JF  - Tectonophysics
Y1  - 2005
U6  - https://doi.org/10.1016/j.tecto.2005.03.005
SN  - 1879-3266
VL  - 401
IS  - 1-2
SP  - 119
EP  - 142
ER  - 
TY  - JOUR
A1  - Mottaghy, Darius
A1  - Rath, Volker
T1  - Latent heat effects in subsurface heat transport modelling and their impact on palaeotemperature reconstructions
JF  - Geophysical Journal International
Y1  - 2006
U6  - https://doi.org/10.1111/j.1365-246X.2005.02843.x
SN  - 1365-246X
VL  - 164
IS  - 1
SP  - 236
EP  - 245
ER  - 
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  - https://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  - JOUR
A1  - Rath, V.
A1  - Mottaghy, Darius
T1  - Smooth inversion for ground surface temperature histories: estimating the optimum regularization parameter by generalized cross-validation
JF  - Geophysical Journal International
Y1  - 2007
U6  - https://doi.org/10.1111/j.1365-246X.2007.03587.x
SN  - 1365-246X
VL  - 171
IS  - 3
SP  - 1440
EP  - 1448
ER  - 
TY  - JOUR
A1  - Baier, C.
A1  - Mottaghy, Darius
A1  - Ziegler, M.
A1  - Rath, V.
T1  - Numerische Simulation des Gefrierprozesses  bei der Baugrundvereisung im durchströmten Untergrund
JF  - Bauingenieur
Y1  - 2008
SN  - 0005-6650
VL  - 83
IS  - 2
SP  - 49
EP  - 60
ER  - 
TY  - JOUR
A1  - Mottaghy, Darius
A1  - Vosteen, Hans-Dieter
A1  - Schellschmidt, Rüdiger
T1  - Temperature dependence of the relationship of thermal diffusivity versus thermal conductivity for crystalline rocks
JF  - International Journal of Earth Sciences
Y1  - 2008
U6  - https://doi.org/10.1007/s00531-007-0238-3
SN  - 1437-3262
VL  - 97
IS  - 2
SP  - 435
EP  - 442
ER  - 
TY  - JOUR
A1  - Mottaghy, Darius
A1  - Pechnig, Renate
T1  - Numerische 3D Modelle zur Temperaturvorhersage und Reservoirsimulationen
JF  - BBR - Fachmagazin für Brunnen- und Leitungsbau
Y1  - 2009
VL  - 60
IS  - 10
SP  - 44
EP  - 51
ER  - 
TY  - JOUR
A1  - Rath, V.
A1  - Mottaghy, Darius
T1  - Klimainformation aus dem Untergrund?
JF  - Geographische Rundschau
Y1  - 2014
SN  - 0016-7460
VL  - 66
IS  - 7-8
SP  - 30
EP  - 36
PB  - Westermann
CY  - Braunschweig
ER  - 
TY  - JOUR
A1  - Vogt, C.
A1  - Mottaghy, Darius
A1  - Rath, V.
A1  - Marquart, G.
A1  - Dijkshoorn, L.
A1  - Wolf, A.
A1  - Clauser, C.
T1  - Vertical variation in heat flow on the Kola Peninsula: palaeoclimate or fluid flow?
JF  - Geophysical Journal International
N2  - Following earlier studies, we present forward and inverse simulations of heat and fluid transport of the upper crust using a local 3-D model of the Kola area. We provide best estimates for palaeotemperatures and permeabilities, their errors and their dependencies. Our results allow discriminating between the two mentioned processes to a certain extent, partly resolving the non-uniqueness of the problem. We find clear indications for a significant contribution of advective heat transport, which, in turn, imply only slightly lower ground surface temperatures during the last glacial maximum relative to the present value. These findings are consistent with the general background knowledge of (i) the fracture zones and the corresponding fluid movements in the bedrock and (ii) the glacial history of the Kola area.
Y1  - 2014
U6  - https://doi.org/10.1093/gji/ggu282
SN  - 1365-246X
VL  - 199
IS  - 2
SP  - 829
EP  - 843
PB  - Oxford University Press
CY  - Oxford
ER  - 
TY  - JOUR
A1  - Chen, Tao
A1  - Clauser, Christoph
A1  - Marquart, Gabriele
A1  - Willbrand, Karen
A1  - Mottaghy, Darius
T1  - A new upscaling method for fractured porous media
JF  - Advances in Water Resources
Y1  - 2015
U6  - https://doi.org/10.1016/j.advwatres.2015.03.009
SN  - 0309-1708
N1  - Corrigendum 2019:
https://doi.org/10.1016/j.advwatres.2019.01.004
VL  - 80
SP  - 60
EP  - 68
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Kürten, Sylvia
A1  - Mottaghy, Darius
A1  - Ziegler, Martin
T1  - A new model for the description of the heat transfer for plane thermo-active geotechnical systems based on thermal resistances
JF  - Acta Geotechnica
Y1  - 2015
U6  - https://doi.org/10.1007/s11440-014-0311-6
SN  - 1861-1133
VL  - 10
IS  - 2
SP  - 219
EP  - 229
PB  - Springer
CY  - Berlin
ER  -