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  - http://dx.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  - 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  - 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  - 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  - 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  - 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  - Formeln statt Zahlen : Referenzwerte Formeln zur energetischen Bewertung von Produktionsanlagen
JF  - BWK : das Energie-Fachmagazin
Y1  - 2005
SN  - 0006-9612
SN  - 1618-193X
VL  - 57
IS  - 12
SP  - 52
EP  - 55
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  - 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  - Kirschkamp, T.
A1  - Jöckel, M.
A1  - Wählisch, Georg
A1  - Barry, J. C.
T1  - Konstruktion eines Modellauges zur Simulation von Purkinje-Spiegelbildern für die Bestimmung der Krümmungsradien und der Lage der Augenlinse
JF  - Biomedizinische Technik = Biomedical Engineering
Y1  - 1998
SN  - 1862-278X (E-Journal); 0013-5585 (Print)
N1  - Printausg. in der Bibliothek vorhanden: 63 Z 471-1998/99
VL  - Bd. 43
IS  - H. 11
SP  - 318
EP  - 325
ER  - 
TY  - JOUR
A1  - Sabitova, A.
A1  - Ebert, Ph.
A1  - Lenz, A.
A1  - Schaafhausen, S.
A1  - Ivanova, L.
A1  - Dähne, M.
A1  - Hoffmann, A.
A1  - Dunin-Borkowski, R. E.
A1  - Förster, Arnold
A1  - Grandidier, B.
A1  - Eisele, H.
T1  - Intrinsic bandgap of cleaved ZnO(112¯0) surfaces
JF  - Applied physics letters
Y1  - 2013
SN  - 1077-3118 (E-Journal); 0003-6951 (Print)
VL  - Vol. 102
SP  - 021608
ER  - 
TY  - JOUR
A1  - Goldbach, Daniel
T1  - Fahrstabilitätserhöhung bei Gespannen durch Querverschiebung des Anhängerkupplungspunktes
JF  - mechatronik mobil
Y1  - 2010
SN  - 1867-7371
VL  - 2
IS  - 1
SP  - 23
EP  - 29
PB  - Expert Verlag
CY  - Renningen
ER  - 
TY  - JOUR
A1  - Böhm, Stefan
A1  - Hellmanns, Mark
A1  - Backes, Andreas
A1  - Dilger, Klaus
T1  - Lock-in thermography based NDT of parts for the automotive industry
JF  - Journal of adhesion and interface
Y1  - 2006
VL  - Vol. 7
IS  - No. 4
SP  - 10
EP  - 12
ER  - 
TY  - JOUR
A1  - Hellmanns, Mark
A1  - Böhm, Stefan
A1  - Dilger, Klaus
T1  - Manual applications of adhesives
JF  - Journal of adhesion and interface
Y1  - 2006
VL  - Vol. 7
IS  - No. 4
SP  - 24
EP  - 27
ER  - 
TY  - JOUR
A1  - Kern, Alexander
A1  - Braun, Christian
T1  - Neuerungen bei der Blitzschutznorm. Teil 2
JF  - etz Elektrotechnik und Automation
Y1  - 2013
SN  - 0170-1711
N1  - Printausg. in der Bibliothek der FH Aachen vorhanden: 23 Z 133 ; 63 ZS 035
VL  - Bd. 134
IS  - H. 8
SP  - 66
EP  - 69
PB  - VDE-Verlag
CY  - Wuppertal
ER  - 
TY  - JOUR
A1  - Meliß, Michael
A1  - Oesterwind, Dieter
A1  - Voß, Alfred
T1  - Non-nuclear and non-fossil energy resources and their possibilities for future power generation
JF  - Kerntechnik
N2  - It must be stressed that the assessment of the exploitation possibilities of the energy resources discussed in this paper requires further studies. With this proviso, the situation can be provisionally summarised as follows: The total potential of known geothermal steam sources is only 64 GW. Geothermal energy could therefore only make a significant contribution to covering the worldwide power needs if we succeed in exploiting dry geothermal reservoirs. Exploitation of tidal energy is limited to a few geographically favourable locations. The power generation potential at these locations is only about 64 GW. An important drawback of tidal power is discontinuous power generation. Large scale exploitation of wind, wave and glacier energy, and of ocean heat, requires solution of a number of technological problems. The environmental effects of exploitation of these energy resources are to some extent of a qualitatively different nature from those of operation of fossil-fuel-fired and of nuclear power plants. The scanty knowledge in this area often results in these effects being underestimated. In any case, however, it would be deliberately misleading to postulate that any form of power generation is possible without some detrimental effects on the environment. It may be stated in conclusion that, owing to their small potential or to the as yet insufficiently advanced technological development, none of the energy resources discussed in this paper can make a significant contribution to the solution of middle-term energy supply problems, i.e., to a rapid replacement of mineral oil and natural gas.
Y1  - 1975
U6  - http://dx.doi.org/10.18419/opus-8093
SN  - 0932-3902
N1  - Printausg. in der Bibliothek vorhanden: 63 ZS 010-1975
VL  - 17
IS  - 7
SP  - 301
EP  - 306
PB  - De Gruyter
CY  - Berlin
ER  - 
TY  - JOUR
A1  - Koller, R.
A1  - Stellberg, Michael
T1  - Ein Weg zu einer systematischen Konstruktion und Ordnung von Schnappverbindungen
JF  - Konstruktion : Zeitschrift für Produktentwicklung und Ingenieur-Werkstoffe. Bd 39 (1987), H. 8
Y1  - 1987
SN  - 0720-5953
SP  - 315
EP  - 320
ER  - 
TY  - JOUR
A1  - Koller, R.
A1  - Stellberg, Michael
T1  - Hilfsmittel zum systematischen Konstruieren : Ordnen von Spannverbindungen
JF  - Industrie-Anzeiger. Bd. 109 (1987), H. 24
Y1  - 1987
SN  - 0019-9036
SP  - 28 - 29
EP  - 31 - 32
ER  - 
TY  - JOUR
A1  - Gerling, Ulrich
A1  - Lück, Reinhard
A1  - Predel, Bruno
T1  - Assoziation in flüssigen Germanium-Zink-Legierungen
JF  - Zeitschrift für Metallkunde : international journal of materials research and advanced techniques. Bd. 77, H. 6
Y1  - 1986
SN  - 0044-3093 ; 0179-4841
SP  - 489
EP  - 496
ER  - 
TY  - JOUR
A1  - Predel, Bruno
A1  - Gerdes, F.
A1  - Gerling, Ulrich
T1  - Berücksichtigung der Assoziation in der Dampfphase bei Aktivitätsbestimmungen und Revision der Aktivitäten flüssiger Legierungen der Systeme Selen-Thallium, Selen-Wismut und Selen-Antimon
JF  - Zeitschrift für Metallkunde : international journal of materials research and advanced techniques. Bd. 70, H. 2
Y1  - 1979
SN  - 0044-3093 ; 0179-4841
SP  - 109
EP  - 112
ER  -