@inproceedings{KuperjansSeitzWilhelm1998,
  author    = {Kuperjans, Isabel and Seitz, C.-W. and Wilhelm, H.-G.},
  title     = {Realisierung einer Fernw{\"a}rmeversorgung mit Kraft-W{\"a}rme-Kopplung f{\"u}r den Wohnwertpark Br{\"u}hl},
  series = {Energiemanagement in Kommunen und {\"o}ffentlichen Einrichtungen : Tagung Stuttgart, 16. und 17. September 1998. - (VDI-Berichte ; 1424)},
  booktitle = {Energiemanagement in Kommunen und {\"o}ffentlichen Einrichtungen : Tagung Stuttgart, 16. und 17. September 1998. - (VDI-Berichte ; 1424)},
  publisher = {VDI-Verl.},
  address   = {D{\"u}sseldorf},
  organization    = {Gesellschaft Energietechnik},
  issn      = {3-18-091424-6},
  pages     = {129 -- 138},
  year      = {1998},
  language  = {de}
}
@inproceedings{KuperjansSchreiberDetermannetal.1998,
  author    = {Kuperjans, Isabel and Schreiber, M. and Determann, L. and Schreiber, R.},
  title     = {Entscheidungsunterst{\"u}tzung bei der Gestaltung der betrieblichen Energieversorgung und -nutzung},
  series = {Innovationen bei der rationellen Energieanwendung : neue Chancen f{\"u}r die Wirtschaft ; Tagung Dortmund, 3. und 4. M{\"a}rz 1998. - (VDI-Berichte ; 1385)},
  booktitle = {Innovationen bei der rationellen Energieanwendung : neue Chancen f{\"u}r die Wirtschaft ; Tagung Dortmund, 3. und 4. M{\"a}rz 1998. - (VDI-Berichte ; 1385)},
  publisher = {VDI-Verl.},
  address   = {D{\"u}sseldorf},
  isbn      = {3-18-091385-1},
  pages     = {79 -- 94},
  year      = {1998},
  language  = {de}
}
@inproceedings{PauksztatKuperjansdeHesselle2006,
  author    = {Pauksztat, Anja and Kuperjans, Isabel and de Hesselle, M.},
  title     = {Referenzformeln f{\"u}r Energiebedarf und CO2-Emissionen in der Glasindustrie},
  series = {Energieeffizienz - Chancen f{\"u}r die Zukunft : Tagung Berlin, 14. und 15. November 2006. - (VDI-Berichte ; 1951)},
  booktitle = {Energieeffizienz - Chancen f{\"u}r die Zukunft : Tagung Berlin, 14. und 15. November 2006. - (VDI-Berichte ; 1951)},
  edition   = {Nichtred. Ms.-Dr.},
  publisher = {VDI-Verl.},
  address   = {D{\"u}sseldorf},
  isbn      = {3-18-091951-5},
  pages     = {179 -- 190},
  year      = {2006},
  language  = {de}
}
@article{Kuperjans2011,
  author    = {Kuperjans, Isabel},
  title     = {Gute Planung ist alles : Energieeffizienz in der Pharmaproduktion},
  series = {Pharma + Food},
  volume    = {2011},
  journal   = {Pharma + Food},
  number    = {2},
  publisher = {H{\"u}thig},
  address   = {Heidelberg},
  issn      = {1434-8942},
  pages     = {8 -- 10},
  year      = {2011},
  language  = {de}
}
@article{AugensteinHerbergsKuperjans2006,
  author    = {Augenstein, Eckardt and Herbergs, S. and Kuperjans, Isabel},
  title     = {TOP-Energy : ein Werkzeug zur Optimierung der Geb{\"a}udeenergieversorgung},
  series = {KI : K{\"a}lte, Luft, Klimatechnik},
  journal   = {KI : K{\"a}lte, Luft, Klimatechnik},
  number    = {5},
  issn      = {1865-5432},
  pages     = {198 -- 201},
  year      = {2006},
  language  = {de}
}
@article{KuperjansWeitzel2015,
  author    = {Kuperjans, Isabel and Weitzel, J.},
  title     = {Energiedesign 2020 : Sichere Strom- und W{\"a}rmeversorgung f{\"u}r die Industrie},
  series = {TAB: das Fachmedium der TGA-Branche},
  journal   = {TAB: das Fachmedium der TGA-Branche},
  number    = {3},
  publisher = {Bauverlag},
  address   = {G{\"u}tersloh},
  issn      = {0341-2032},
  pages     = {105 -- 107},
  year      = {2015},
  language  = {de}
}
@inproceedings{KasperSchiffelsKrafftetal.2016,
  author    = {Kasper, Katharina and Schiffels, Johannes and Krafft, Simone and Kuperjans, Isabel and Elbers, Gereon and Selmer, Thorsten},
  title     = {Biogas Production on Demand Regulated by Butyric Acid Addition},
  series = {IOP Conference Series: Earth and Environmental Science. Bd. 32},
  volume    = {32},
  booktitle = {IOP Conference Series: Earth and Environmental Science. Bd. 32},
  issn      = {1755-1315},
  doi       = {10.1088/1755-1315/32/1/012009},
  pages     = {012009/1 -- 012009/4},
  year      = {2016},
  language  = {en}
}
@article{JablonowskiKollmannNabeletal.2016,
  author    = {Jablonowski, Nicolai David and Kollmann, Tobias and Nabel, Moritz and Damm, Tatjana and Klose, Holger and M{\"u}ller, Michael and Bl{\"a}sing, Marc and Seebold, S{\"o}ren and Krafft, Simone and Kuperjans, Isabel and Dahmen, Markus and Schurr, Ulrich},
  title     = {Valorization of Sida (Sida hermaphrodita) biomass for multiple energy purposes},
  series = {GCB [Global Change Biology] Bioenergy},
  volume    = {9},
  journal   = {GCB [Global Change Biology] Bioenergy},
  number    = {1},
  publisher = {Wiley-VCH},
  address   = {Weinheim},
  issn      = {1757-1707 (online)},
  doi       = {10.1111/gcbb.12346},
  pages     = {202 -- 214},
  year      = {2016},
  abstract  = {The performance and biomass yield of the perennial energy plant Sida hermaphrodita (hereafter referred to as Sida) as a feedstock for biogas and solid fuel was evaluated throughout one entire growing period at agricultural field conditions. A Sida plant development code was established to allow comparison of the plant growth stages and biomass composition. Four scenarios were evaluated to determine the use of Sida biomass with regard to plant development and harvest time: (i) one harvest for solid fuel only; (ii) one harvest for biogas production only; (iii) one harvest for biogas production, followed by a harvest of the regrown biomass for solid fuel; and (iv) two consecutive harvests for biogas production. To determine Sida's value as a feedstock for combustion, we assessed the caloric value, the ash quality, and melting point with regard to DIN EN ISO norms. The results showed highest total dry biomass yields of max. 25 t ha⁻¹, whereas the highest dry matter of 70\% to 80\% was obtained at the end of the growing period. Scenario (i) clearly indicated the highest energy recovery, accounting for 439 288 MJ ha⁻¹; the energy recovery of the four scenarios from highest to lowest followed this order: (i) ≫ (iii) ≫ (iv) > (ii). Analysis of the Sida ashes showed a high melting point of >1500 °C, associated with a net calorific value of 16.5-17.2 MJ kg⁻¹. All prerequisites for DIN EN ISO norms were achieved, indicating Sida's advantage as a solid energy carrier without any post-treatment after harvesting. Cell wall analysis of the stems showed a constant lignin content after sampling week 16 (July), whereas cellulose had already reached a plateau in sampling week 4 (April). The results highlight Sida as a promising woody, perennial plant, providing biomass for flexible and multipurpose energy applications.},
  language  = {en}
}
@inproceedings{RuppKuperjansSchulze2016,
  author    = {Rupp, Matthias and Kuperjans, Isabel and Schulze, Sven},
  title     = {Energetische und {\"o}kologische Bewertung hybrider Antriebe im st{\"a}dtischen Busverkehr},
  series = {Commercial vehicle technology 2016 : proceedings of the 4th Commercial Vehicle Technology Symposium (CVT 2016), March 8-10, 2016, University of Kaiserslautern, Kaiserslautern, Germany},
  booktitle = {Commercial vehicle technology 2016 : proceedings of the 4th Commercial Vehicle Technology Symposium (CVT 2016), March 8-10, 2016, University of Kaiserslautern, Kaiserslautern, Germany},
  editor    = {Berns, Karsten},
  publisher = {Shaker},
  address   = {Aachen},
  organization    = {Internationales Commercial Vehicle Technology Symposium <4, 2016, Kaiserslautern>},
  pages     = {227 -- 237},
  year      = {2016},
  abstract  = {In Anbetracht weltweit zunehmend strengerer klimapolitischer Ziele steigt auch der Druck f{\"u}r Nutzfahrzeughersteller, effizientere und umweltfreundlichere Technologien zu entwickeln. Den Blick bei der Bewertung dieser ausschließlich auf die Fahrzeugnutzung zu richten, ist l{\"a}ngst nicht mehr zufriedenstellend. Im Rahmen dieser Analyse wird ein gegenw{\"a}rtig auf dem Markt erwerblicher und in deutschen St{\"a}dten bereits seit Jahren betriebener Hybridbus energetisch und {\"o}kologisch mit einem konventionell angetriebenen, nahezu baugleichen Modell entlang des Lebensweges bewertet. Nach Definition von Ziel und Untersuchungsrahmen wird ein {\"U}berblick auf bereits durchgef{\"u}hrte Lebenszyklusanalysen zu Hybridbussen im Stadtverkehr gegeben und Schlussfolgerungen f{\"u}r die anschließende Analyse abgeleitet. Diese wird im Rahmen einer energetischen und {\"o}kologischen Bewertung beider Produktsysteme anhand der Parameter "Prim{\"a}renergieeinsatz" und "CO2{\"a}q Emissionen" praktiziert. Der Fahrzeugrumpf beider Fahrzeuge des gleichen Modells wird dabei als einheitlich angenommen, sodass bei dem Vergleich der Herstellung vereinfacht nur die sich unterscheidenden Komponenten des Antriebstranges ber{\"u}cksichtigt werden. Die Resultate der Wirkungsabsch{\"a}tzung werden als Differenz des Hybridbusses gegen{\"u}ber dem Referenzfahrzeug {\"u}ber die einzelnen Lebenszyklusphasen dargestellt. Schließlich werden Prognosen getroffen, ab welcher Strecke die bei der Herstellung erzeugten h{\"o}heren CO2{\"a}q Emissionen des Hybridantriebstranges gegen{\"u}ber dem Referenzmodell ausgeglichen werden.},
  language  = {de}
}
@article{RuppSchulzeKuperjans2018,
  author    = {Rupp, Matthias and Schulze, Sven and Kuperjans, Isabel},
  title     = {Comparative life cycle analysis of conventional and hybrid heavy-duty trucks},
  series = {World electric vehicle journal},
  volume    = {9},
  journal   = {World electric vehicle journal},
  number    = {2},
  publisher = {MDPI},
  address   = {Basel},
  issn      = {2032-6653},
  doi       = {10.3390/wevj9020033},
  pages     = {Article No. 33},
  year      = {2018},
  abstract  = {Heavy-duty trucks are one of the main contributors to greenhouse gas emissions in German traffic. Drivetrain electrification is an option to reduce tailpipe emissions by increasing energy conversion efficiency. To evaluate the vehicle's environmental impacts, it is necessary to consider the entire life cycle. In addition to the daily use, it is also necessary to include the impact of production and disposal. This study presents the comparative life cycle analysis of a parallel hybrid and a conventional heavy-duty truck in long-haul operation. Assuming a uniform vehicle glider, only the differing parts of both drivetrains are taken into account to calculate the environmental burdens of the production. The use phase is modeled by a backward simulation in MATLAB/Simulink considering a characteristic driving cycle. A break-even analysis is conducted to show at what mileage the larger CO2eq emissions due to the production of the electric drivetrain are compensated. The effect of parameter variation on the break-even mileage is investigated by a sensitivity analysis. The results of this analysis show the difference in CO2eq/t km is negative, indicating that the hybrid vehicle releases 4.34 g CO2eq/t km over a lifetime fewer emissions compared to the diesel truck. The break-even analysis also emphasizes the advantages of the electrified drivetrain, compensating the larger emissions generated during production after already a distance of 15,800 km (approx. 1.5 months of operation time). The intersection coordinates, distance, and CO2eq, strongly depend on fuel, emissions for battery production and the driving profile, which lead to nearly all parameter variations showing an increase in break-even distance.},
  language  = {en}
}