2019, Kleshchov, Anton, Hengevoss, Dirk, Hugi, Christoph

2017-05, Hengevoss, Dirk, Hugi, Christoph, Wintgens, Thomas, Lenz, Markus, Schäfer, Roman

2016, Hengevoss, Dirk, Baumgartner, Corinne, Hugi, Christoph, Nisato, Giovanni

Organic photovoltaic technology has reached a sufficient maturity to enable commercially viable products for integration into buildings with power conversion efficiencies up to about 5%, for example, using a roll-to-roll (R2R) processing of single bulk heterojunction devices technology. This paper reports on a Life Cycle Assessment (LCA) and eco-efficiency analysis of prospective tandem organic photovoltaic (OPV) modules which have been manufactured to the most part in pilot environments. To realistically model the LCA and eco-efficiency a power conversion efficiency of both 10% and a more modest 8% were used with lifespan scenarios of 15 and 20 years. The tandem OPV modules modelled in this study have: a cell stack consisting of new advanced materials such as nano-sized zinc oxide, nano-sized silver, and semiconductor polymers; a light management structure; and new flexible PET based encapsulation with organic and inorganic barriers. This tandem technology was modelled assuming an industrialized production based on real and estimated resource consumption and pollution data from an existing roll-to-roll pilot OPV plant and from material suppliers together with projected costs. Established multi-silicon (multi-Si) and cadmium-telluride (CdTe) photovoltaics were taken to benchmark the environmental impacts in production and the expected levelized costs of electricity. The results of the modelling show that the production of 1 m2 tandem OPV module represents only approximately 3–10% of the impacts of 1 m2 of the benchmark multi-Si or CdTe modules when the global warming potential (GWP), cumulative energy demand (CED), eco-toxicity, and metal depletion environmental impacts are considered. The results also show the energy payback time of a tandem OPV at facade is only 18–55% of that of the benchmarks, and the GWP is just 12–60% of that of the benchmarks. An eco-efficiency comparison indicates that, for applications where photovoltaic modules cannot be optimally oriented towards the sun, a flexible tandem OPV might be a superior alternative to multi-Si and CdTe modules.

2015, Zimmermann, Yannick, Brun, Nadja, Hengevoss, Dirk, Corvini, Philippe, Fent, Karl, Hugi, Christoph, Lenz, Markus

2019, Park, Jeeyoung, Hengevoss, Dirk

2017, Mutz, Dieter, Hengevoss, Dirk, Hugi, Christoph, Gross, Thomas

2015-08, Kim, David Pascal, Geissler, Achim, Hengevoss, Dirk, Menn, Claudio

Aufgrund der Energieperspektiven 2050 des schweizerischen Bundesamtes für Energie (BFE) wird das zukünftige Potenzial von gebrauchten Lithium-Ionen-Batterien aus Elektrofahrzeugen als stationäre Stromspeicher in Gebäuden untersucht. In drei Szenarien wird der Umweltnutzen für das Jahr 2035 und 2050 ermittelt. Hierzu wird berechnet wie viel Kapazität an herkömmlichen Speichern durch eine gewisse Kapazität an wiederverwendbaren gebrauchten Batterien substituiert werden kann. Das Substitutionspotenzial wird mit ausgewählten Wirkindikatoren wie dem Treibhauspotenzial (GWP) und dem kumulierten Energieaufwand (CED) analysiert. Im Jahr 2050 können dadurch 760 bis 1170 MWh an herkömmlichen Speichern durch 2nd-Life-Speicher substituiert werden. Dabei kann das Treibhauspotenzial pro Jahr um 11'000 bis 16'000 t CO2 Äq gesenkt und der kumulierte Energieaufwand um 207'000 bis 305'000 GJ verringert werden. Die Resultate zeigen, dass der Einsatz von 2nd-Life-Batterien in stationären Anwendungen einen signifikanten Beitrag zur Reduktion der Umweltbelastung von Batterien beitragen kann.

2019, Hengevoss, Dirk, Hugi, Christoph, Kunz, Dominique

2016-04, Hengevoss, Dirk, Zimmermann, Yannick, Brun, Nadja, Hugi, Christoph, Corvini, Philippe, Lenz, Markus, Fent, Karl, Nisato, Giovanni, Lupo, Donald, Ganz, Simone

2015, Hengevoss, Dirk, Baumgartner, Corinne, Hugi, Christoph