TY - CHAP A1 - Voigt, Christian A1 - Dobner, Susanne A1 - Neuschmid, Julia T1 - Data-driven and value sensitive urban decision making T2 - eChallenges e-2015 Conference, 25.11. - 27.11.2015, Vilnius Y1 - 2015 SN - 978-1-9058-2453-3 U6 - https://doi.org/10.1109/echallenges.2015.7441077 SP - 1 EP - 9 PB - IEEE ER - TY - CHAP A1 - Adam, Mario A1 - Ille, Fabian A1 - Radosavljevic, Radojka A1 - Wirth, Hans Peter T1 - PVT-Solarkollektoren - Marktanalyse und Etrags-/Betriebssimulationen von Gesamtsystemen mit Wärmepumpen. Posterpräsentation T2 - 25. OTTI Symposium Thermische Solarenergie, 6.-8.05.2015, Bad Staffelstein KW - PVT-Norm Y1 - 2015 CY - Bad Staffelstein ER - TY - CHAP A1 - Elvers, Paul A1 - Fischinger, Timo A1 - Steffens, Jochen ED - Ginsborg, Jane ED - Lamont, Alexandra T1 - Empowering music - music-induced manipulations of self-esteem T2 - Proceedings of the Ninth Triennial Conference of the European Society for the Cognitive Sciences of Music (ESCOM), CD-ROM Y1 - 2015 CY - Manchester ER - TY - CHAP A1 - Drochtert, Daniel A1 - Geiger, Christian A1 - Hogen, M. A1 - Huldtgren, Alina A1 - Köse, O. A1 - Wiche, R. A1 - Loss, L. ED - Gehring, Sven ED - Krüger, Antonio ED - Alt, Florian ED - Taylor, Nick T1 - Public Brewing: a Media Façade with a Mixed Reality Interface T2 - Proceedings of the 4th International Symposium on Pervasive Displays, 10.06.2015-12.06.2015, Saarbrücken Y1 - 2015 UR - https://dl.acm.org/doi/proceedings/10.1145/2757710 SN - 9781450336086 U6 - https://doi.org/10.1145/2757710.2757736 SP - 69 EP - 75 PB - ACM CY - New York ER - TY - CHAP A1 - Drochtert, Daniel A1 - Geiger, Christian T1 - Collaborative magic lens graph exploration T2 - SIGGRAPH Asia 2015 Mobile Graphics and Interactive Applications, Kobe, 02.11.2015-06.11.2015 Y1 - 2015 UR - https://dl.acm.org/doi/proceedings/10.1145/2818427 SN - 9781450339285 U6 - https://doi.org/10.1145/2818427.2818465 SP - 1 EP - 3 PB - ACM CY - New York ER - TY - CHAP A1 - Huldtgren, Alina A1 - Vormann, Anja A1 - Geiger, Christian ED - Helfert, Markus ED - Holzinger, Andreas ED - Ziefle, Martina ED - Fred, Ana ED - O'Donoghue, John ED - Röcker, Carsten T1 - Mapping Memories for People with Dementia T2 - Information and Communication Technologies for Ageing Well and e-Health Y1 - 2015 SN - 978-3-319-27694-6 U6 - https://doi.org/10.1007/978-3-319-27695-3_10 SP - 165 EP - 184 PB - Springer International Publishing CY - Cham ER - TY - CHAP A1 - Huldtgren, Alina A1 - Vormann, Anja A1 - Geiger, Christian T1 - Reminiscence Map - Insights to Design for People with Dementia from a Tangible Prototype T2 - Proceedings of the 1st International Conference on Information and Communication Technologies for Ageing Well and e-Health, Lisbon, 20.05.2015 - 22.05.2015 Y1 - 2015 UR - http://www.scitepress.org/DigitalLibrary/Link.aspx?doi=10.5220/0005442702330242 SN - 978-989-758-102-1 U6 - https://doi.org/10.5220/0005442702330242 SP - 233 EP - 242 PB - SCITEPRESS - Science and Technology Publications ER - TY - CHAP A1 - Dubberke, Frithjof H. A1 - Priebe, Klaus-Peter A1 - Vrabec, Jadran A1 - Neef, Matthias A1 - Rödder, Maximilian T1 - Thermodynamic simulation and experimental validation of a cascaded two-stage organic Rankine cycle T2 - ASME ORC 2015, Brussels KW - simulation Y1 - 2015 CY - Brussels ER - TY - CHAP A1 - Rödder, Maximilian A1 - Neef, Matthias A1 - Laux, Christoph A1 - Priebe, Klaus-P. T1 - Systematic Fluid Selection for Organic Rankine Cycles (ORC) and Performance Analysis for a Combined High and Low Temperature Cycle T2 - Volume 3: Coal, Biomass and Alternative Fuels; Cycle Innovations; Electric Power; Industrial and Cogeneration N2 - The organic Rankine cycle (ORC) is an established thermodynamic process that converts waste heat to electric energy. Due to the wide range of organic working fluids available the fluid selection adds an additional degree of freedom to the early design phase of an ORC process. Despite thermodynamic aspects such as the temperature level of the heat source, other technical, economic and safety aspects have to be considered. For the fluid selection process in this paper, 22 criteria were identified in six main categories while distinguishing between elimination and tolerance criteria. For an ORC design, the suggested method follows a practical engineering approach and can be used as a structured way to limit the number of interesting working fluids before starting a detailed performance analysis of the most promising candidates. For the first time the selection process is applied to a two-stage reference cycle which uses the waste heat of a large reciprocating engine for cogeneration power plants. It consists of a high temperature and a low temperature cycle in which the condensation heat of the high temperature (HT) cycle provides the heat input of the low temperature (LT) cycle. After the fluid selection process the detailed thermodynamic cycle design is carried out with a thermodynamic design tool that also includes a database for organic working fluids. The investigated ORC cycle shows a net thermal efficiency of about 17,4% in the high temperature cycle with Toluene as the working fluid and 6,2% in low temperature cycle with iso-Butane as the working fluid. The electric efficiency of the cogeneration plant increases from 40,4% to 46,97% with the both stages of the two-stage ORC in operation. Y1 - 2015 UR - https://asmedigitalcollection.asme.org/GT/proceedings/GT2015/56673/Montreal, Quebec, Canada/236733 SN - 978-0-7918-5667-3 U6 - https://doi.org/10.1115/GT2015-42432 PB - American Society of Mechanical Engineers ER - TY - CHAP A1 - Laux, Christoph A1 - Goebel, Johannes A1 - Neef, Matthias A1 - Gotter, Andreas T1 - Investigation in the Technical and Economic Feasibility of a Low-Pressure Steam Cycle for the Waste Heat Utilization of a Cogeneration Plant T2 - Proceedings of the ASME Turbo Expo: Turbine Technical Conference and Exposition - 2015 : presented at the ASME 2015 Turbo Expo: Turbine Technical Conference and Exposition, June 15 - 19, 2015, Montreal, Quebec, Canada / sponsored by the International Gas Turbine Institute N2 - This paper deals with the investigation in the technical and economic feasibility of a low-pressure steam cycle for the waste heat utilization of a combined heat and power (CHP) plant. The proposed steam cycle uses a pressure level below atmospheric pressure which allows to use the heat from the motor’s coolant for evaporation. The cycle is designed to increase the maximum electrical efficiency of a gas fired reciprocating engine and to increase operational flexibility for varying heat demand. Since organic Rankine cycle (ORC) plants are already being successfully used for waste heat recovery, advantages of the low-pressure steam Rankine cycle (SRC) over an ORC are highlighted. Many ORC fluids are toxic or flammable and thus have an increased risk potential compared to water. An additional advantage of water compared to ORC fluids is the possibility of superheating above 500 °C. The technical feasibility of the proposed cycle is studied by the detailed design of the individual system components such as turbine, heat exchangers and auxiliary parts. This includes the detailed thermodynamic design of the full cycle for the calculation of plant efficiencies. As a basis for future experimental investigations, a cogeneration plant with an electrical output of 50 kWel was selected as a heat source for the steam cycle. The design geometries of the turbine and the heat exchanger are presented along with efficiency and cost predictions. A subsonic radial turbine with a rotational speed of 155,000 rpm was selected. The maximum turbine output is about 7.5 kW. The use of a flash evaporator is investigated to reduce the size and the costs for the evaporator. The suggested steam cycle helps to increase the electrical efficiency of the CHP plant by 4.5% points from an original 36.5% to 41.0%. The steam cycle itself has an electrical efficiency of approximately 9%. Additionally, the condensation temperature in this steam cycle is high enough to be extracted as useful heat output to generate domestic water with a temperature of 50°C. Y1 - 2015 SN - 978-0-7918-5667-3 VL - 3: Coal, biomass and alternative fuels - cycle innovations - electric power - industrial and cogeneration PB - International Gas Turbine Institute (ASME) CY - New York ER -