TY  - JOUR
A1  - Pöttgen, Philipp
A1  - Ederer, Thorsten
A1  - Altherr, Lena
A1  - Pelz, Peter F.
T1  - Developing a control strategy for booster stations under uncertain load
JF  - Applied Mechanics and Materials
N2  - Booster stations can fulfill a varying pressure demand with high energy-efficiency, because individual pumps can be deactivated at smaller loads. Although this is a seemingly simple approach, it is not easy to decide precisely when to activate or deactivate pumps. Contemporary activation controls derive the switching points from the current volume flow through the system. However, it is not measured directly for various reasons. Instead, the controller estimates the flow based on other system properties. This causes further uncertainty for the switching decision. In this paper, we present a method to find a robust, yet energy-efficient activation strategy.
KW  - Technical Operations Research (TOR)
KW  - Booster Station
KW  - Pump System
KW  - Discrete Optimization
Y1  - 2015
SN  - 1662-7482
U6  - http://dx.doi.org/10.4028/www.scientific.net/AMM.807.241
N1  - Ebenfalls weltweit einsehbar unter:
http://wl.fst.tu-darmstadt.de/wl/publications/paper_151123_SFB805_
ICUME_Developing_a_Control_Strategy_for_Booster_Stations_under_Uncertain_Load_poettgen_ederer_pelz_altherr.pdf
VL  - 807
IS  - 807
SP  - 241
EP  - 246
PB  - Trans Tech Publications
CY  - Bäch
ER  - 
TY  - JOUR
A1  - Pöttgen, Philipp
A1  - Ederer, Thorsten
A1  - Altherr, Lena
A1  - Lorenz, Ulf
A1  - Pelz, Peter F.
T1  - Examination and optimization of a heating circuit for energy-efficient buildings
JF  - Energy Technology
N2  - The conference center darmstadtium in Darmstadt is a prominent example of energy efficient buildings. Its heating system consists of different source and consumer circuits connected by a Zortström reservoir. Our goal was to reduce the energy costs of the system as much as possible. Therefore, we analyzed its supply circuits. The first step towards optimization is a complete examination of the system: 1) Compilation of an object list for the system, 2) collection of the characteristic curves of the components, and 3) measurement of the load profiles of the heat and volume-flow demand. Instead of modifying the system manually and testing the solution by simulation, the second step was the creation of a global optimization program. The objective was to minimize the total energy costs for one year. We compare two different topologies and show opportunities for significant savings.
KW  - energy transfer
KW  - heating system
KW  - programming
KW  - system optimization
KW  - technical operations research
Y1  - 2015
SN  - 2194-4296
U6  - http://dx.doi.org/10.1002/ente.201500252
VL  - 4
IS  - 1
SP  - 136
EP  - 144
PB  - WILEY-VCH Verlag
CY  - Weinheim
ER  - 
TY  - JOUR
A1  - Altherr, Lena
A1  - Ederer, Thorsten
A1  - Pöttgen, Philipp
A1  - Lorenz, Ulf
A1  - Pelz, Peter F.
ED  - Pelz, Peter F.
ED  - Groche, Peter
T1  - Multicriterial optimization of technical systems considering multiple load and availability scenarios
JF  - Applied Mechanics and Materials
N2  - Cheap does not imply cost-effective -- this is rule number one of zeitgeisty system design. The initial investment accounts only for a small portion of the lifecycle costs of a technical system. In fluid systems, about ninety percent of the total costs are caused by other factors like power consumption and maintenance. With modern optimization methods, it is already possible to plan an optimal technical system considering multiple objectives. In this paper, we focus on an often neglected contribution to the lifecycle costs: downtime costs due to spontaneous failures. Consequently, availability becomes an issue.
KW  - sustainability
KW  - availability
KW  - energy efficiency
KW  - mixed-integer linear programming
KW  - system synthesis
Y1  - 2015
SN  - 1660-9336
U6  - http://dx.doi.org/10.4028/www.scientific.net/AMM.807.247
VL  - 807
SP  - 247
EP  - 256
ER  - 
TY  - CHAP
A1  - Schänzle, Christian
A1  - Altherr, Lena
A1  - Ederer, Thorsten
A1  - Pelz, Peter
T1  - TOR – Towards the energetically optimal ventilation system
KW  - Energy
KW  - Efficiency
KW  - Ventilation System
KW  - Discrete Optimisation
KW  - TGA
Y1  - 2015
N1  - EST 2015, Karlsruhe, 19-21 Mai 2015
ER  - 
TY  - RPRT
A1  - Geißler, Karsten
A1  - Prokop, Ines
A1  - Bubner, André
A1  - Egner, Ralf
A1  - Heyde, Stefan
A1  - Kempkes, Marian
A1  - Kühn, Bertram
A1  - Laumann, Jörg
A1  - Lieberwirth, Peter
A1  - Naumes, Johannes
A1  - Ruga, Julija
A1  - Schilling, Sivo
A1  - Schmidt, Herbert
A1  - Ummenhofer, Thomas
T1  - Verbesserung der Praxistauglichkeit der Baunormen durch pränormative Arbeit – Teilantrag 3: Stahlbau, Abschlussbericht
Y1  - 2015
SN  - 978-3-8167-9539-1
PB  - Fraunhofer IRB Verlag
CY  - Stuttgart
ER  - 
TY  - JOUR
A1  - Pietsch, Wolfram
T1  - Augmenting voice of the customer analysis by analysis of belief
JF  - QFD-Forum
Y1  - 2015
SN  - 1431-6951
IS  - 30
SP  - 1
EP  - 5
ER  - 
TY  - RPRT
A1  - Blandford, Daniel
A1  - Dachwald, Bernd
A1  - Digel, Ilya
A1  - Espe, Clemens
A1  - Feldmann, Marco
A1  - Francke, Gero
A1  - Hiecke, Hannah
A1  - Kowalski, Julia
A1  - Lindner, Peter
A1  - Plescher, Engelbert
A1  - Schöngarth, Sarah
T1  - Enceladus Explorer : Schlussbericht —  Version: 1.0
Y1  - 2015
U6  - http://dx.doi.org/10.2314/GBV:86319950X
N1  - Förderkennzeichen BMWi 50NA1206
PB  - FH Aachen
CY  - Aachen
ER  - 
TY  - CHAP
A1  - Seefeldt, Patric
A1  - Bauer, Waldemar
A1  - Dachwald, Bernd
A1  - Grundmann, Jan Thimo
A1  - Straubel, Marco
A1  - Sznajder, Maciej
A1  - Tóth, Norbert
A1  - Zander, Martin E.
T1  - Large lightweight deployable structures for planetary defence: solar sail propulsion, solar concentrator payloads, large-scale photovoltaic power
T2  - 4th IAA Planetary Defense Conference - PDC 2015, 13-17 April 2015, Frascati, Roma, Italy
Y1  - 2015
N1  - IAA-PDC-15-P-20
ER  - 
TY  - JOUR
A1  - Golland, Alexander
A1  - Engling, Christoph
T1  - Offene und geschlossene WLAN: Rechtliche Hürden bei Betrieb eines öffentlichen Internetzugangs
JF  - DSB Datenschutz-Berater
Y1  - 2015
SN  - 0170-7256
VL  - 39
IS  - 5
SP  - 102
EP  - 103
PB  - Beck
CY  - Gütersloh
ER  - 
TY  - JOUR
A1  - Czarnecki, Christian
T1  - Moderne Telekommunikationsprodukte erfordern standardisierte 
Geschäftsprozesse
JF  - Wirtschaft und Wissenschaft
Y1  - 2015
IS  - 2
SP  - 7
EP  - 7
PB  - Deutsche Telekom AG. Fachhochschule Leipzig
CY  - Leipzig
ER  -