TY  - JOUR
A1  - Höttges, Jörg
T1  - Turbulence and Mixing Mechanics in Compound Open Channel Flow / Arnold, Uwe; Höttges, Jörg; Rouvé, Gerhard
JF  - On cutoff ratios of curved channels : paper presented at the 23rd Congress of the IAHR, Ottawa, Canada, August 21 - 25, 1989 / G. J. Klaassen; B. H. J.van Zanten
Y1  - 1990
N1  - Congress of the IAHR ; (23 : ; 1989.08.21-25 : ; Ottawa)
PB  - Delft Hydraulics
CY  - Delft
ER  - 
TY  - JOUR
A1  - Höttges, Jörg
T1  - A Full Finite Element Solution for the Unsteady Advection-Diffusion Equation
JF  - Computational methods in water resources : [proceedings of the Ninth International Conference on Computational Methods in Water Resources held at the University of Colorado at Denver, U.S.A., in June 1992] / ed.: T. F. Russell
Y1  - 1992
SN  - 185312169X
N1  - International Conference on Computational Methods in Water Resources ; (9, 1992, Denver, Colo.)
PB  - Computational Mechanics Publications [u.a.]
CY  - Southampton [u.a.]
ER  - 
TY  - JOUR
A1  - Höttges, Jörg
T1  - QKan - Management of drainage system data with QGIS
JF  - Free and Open Source Software for Geospatial (FOSS4G) Conference Proceedings
Y1  - 2017
VL  - 17
IS  - Article 13
SP  - 95
EP  - 100
ER  - 
TY  - CHAP
A1  - Heinz, G.
A1  - Oertel, Mario
A1  - Bung, Daniel B.
ED  - Janssen, Robert
T1  - Investigations on a cooling water system for a gas tubine facility concerning air vortexes and sediment transport
T2  - Hydraulic structures: useful water harvesting systems or relics? : Third International Junior Researcher and Engineer Workshop on Hydraulic Structures (IJREWHS'10) : Edinburgh, Scotland, U.K., 2-3 May 2010
Y1  - 2010
SN  - 9781742720159
SP  - 109
EP  - 116
PB  - School of Civil Engineering, The University of Queensland
CY  - Brisbane
ER  - 
TY  - JOUR
A1  - Hagenkamp, Markus
A1  - Blanke, Tobias
A1  - Döring, Bernd
T1  - Thermoelectric building temperature control: a potential assessment
JF  - International Journal of Energy and Environmental Engineering
N2  - This study focuses on thermoelectric elements (TEE) as an alternative for room temperature control. TEE are semi-conductor devices that can provide heating and cooling via a heat pump effect without direct noise emissions and no refrigerant use. An efficiency evaluation of the optimal operating mode is carried out for different numbers of TEE, ambient temperatures, and heating loads. The influence of an additional heat recovery unit on system efficiency and an unevenly distributed heating demand are examined. The results show that TEE can provide heat at a coefficient of performance (COP) greater than one especially for small heating demands and high ambient temperatures. The efficiency increases with the number of elements in the system and is subject to economies of scale. The best COP exceeds six at optimal operating conditions. An additional heat recovery unit proves beneficial for low ambient temperatures and systems with few TEE. It makes COPs above one possible at ambient temperatures below 0 ∘C. The effect increases efficiency by maximal 0.81 (from 1.90 to 2.71) at ambient temperature 5 K below room temperature and heating demand Q˙h=100W but is subject to diseconomies of scale. Thermoelectric technology is a valuable option for electricity-based heat supply and can provide cooling and ventilation functions. A careful system design as well as an additional heat recovery unit significantly benefits the performance. This makes TEE superior to direct current heating systems and competitive to heat pumps for small scale applications with focus on avoiding noise and harmful refrigerants.
Y1  - 2021
U6  - http://dx.doi.org/10.1007/s40095-021-00424-x
N1  - Corresponding author: Markus Hagenkamp
VL  - 13
SP  - 241
EP  - 254
PB  - Springer
CY  - Berlin
ER  - 
TY  - CHAP
A1  - Groß, Rolf Fritz
A1  - Hecken, M.
A1  - Renz, Ulrich
ED  - Dittler, A.
ED  - Hemmer, G.
ED  - Kasper, G.
T1  - Hot gas filtration with ceramic filter candles: experimental and numerical investigations on fluid flow during element cleaning
T2  - High temperature gas cleaning. Vol. 2
N2  - Ceramic hot gas filters are widely used in combined cycles based on pressurised fluidised beds. They fulfil most of the demands with respect to cleaning efficiency and long time durability, but their operation regarding the consumption of pulse gas and energy still has to be optimised. Experimental investigations were carried out to measure the flow field, the pressure and the gas temperature inside the filter candle during pulse jet cleaning. These results are compared with the results of a numerical procedure based on a solution of the two - dimensional conservation equations for momentum and energy. The observed difficulties handling different flow regimes like highly turbulent flow as well as Darcy flow simultaneously are discussed.
KW  - 20 fossil-fueled power plants
KW  - hot gas cleanup
KW  - ceramics
KW  - filtration
KW  - gas flow
Y1  - 1999
SN  - 3-9805220-1-6
N1  - 4th International Symposium and Exhibition on Gas Cleaning at High Temperatures, 22.-24.09.1999, Karlsruhe
SP  - 862
EP  - 873
PB  - KIT Institut für Mechanische Verfahrenstechnik und Mechanik
CY  - Karlsruhe
ER  - 
TY  - JOUR
A1  - Gossla, Ulrich
A1  - Sato, R.
T1  - Present production circumstances of aggregate in Germany / Sato, R.; Gossla, U.
JF  - Cement & Concrete (1998)
Y1  - 1998
N1  - auf Japanisch
SP  - 146
EP  - 153
ER  - 
TY  - CHAP
A1  - Gogolin, C.
A1  - Carvalho, R.
A1  - Bung, Daniel B.
A1  - Matos, J.
T1  - Experimental and numerical investigation of steady and unsteady flows in roughened channels with cross beams
T2  - 35th IAHR world congress : 8.-13.9.2013, Chengdu, China
Y1  - 2013
SP  - Artikelkennnummer: A10837C
PB  - Tsinghua Univ. Press
CY  - Beijing
ER  - 
TY  - CHAP
A1  - Ganegedara, H.
A1  - Alahakoon, D.
A1  - Mashford, J.
A1  - Paplinski, A.
A1  - Müller, Karsten
A1  - Deserno, T. M.
T1  - Self organising map based region of interest labelling for automated defect identification in large sewer pipe image collections
T2  - The 2012 International Joint Conference on Neural Networks (IJCNN) : 10 - 15 June 2012, Brisbane, Australia ; [part of the] 2012 IEEE World Congress on Computational Intelligence (IEEE-WCCI 2012)
Y1  - 2012
SN  - 978-1-4673-1490-9
PB  - IEEE
CY  - Piscataway, NJ
ER  - 
TY  - CHAP
A1  - Fellin, Wolfgang
A1  - King, Julian
A1  - Kirsch, Ansgar
A1  - Oberguggenberger, Michael
T1  - Uncertainty modelling and sensitivity analysis of tunnel face stability
T2  - Safety, reliability and risk of structures, infrastructures and engineering systems : proceedings of the tenth International Conference on Structural Safety and Reliability (ICOSSAR 2009), Osaka, Japan, 13-17 September 2009 / ed.: Hitoshi Furuta ...
Y1  - 2009
SN  - 978-0-415-47557-0
SP  - 112
EP  - 114
PB  - CRC Pr.
CY  - Boca Raton, Fla. [u.a.]
ER  -