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@ARTICLE{Kockel:897412,
author = {Kockel, Christina and Nolting, Lars and Goldbeck, Rafael
and Wulf, Christina and De Doncker, Rik W. and Praktiknjo,
Aaron},
title = {{A} scalable life cycle assessment of alternating and
direct current microgrids in office buildings},
journal = {Applied energy},
volume = {305},
issn = {0306-2619},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {FZJ-2021-03776},
pages = {117878 -},
year = {2022},
abstract = {Microgrids integrating local renewable energy sources at
low-voltage level show promising potentials in realizing a
reliable, efficient, and clean supply of electricity.
Further improvements are expected when such a microgrid is
operated on direct current (dc) instead of alternating
current (ac) infrastructure for power distribution commonly
in use today. Our study aims to systemically quantify the
gap between environmental impacts of microgrids at building
level using the case study of power distribution within
office buildings. For this purpose, a scalable comparative
life cycle assessment (LCA) is conducted based on a
technical bottom-up analysis of differences between ac and
dc microgrids. Particularly, our approach combines the
assessment of required power electronic components on a
micro-level with the macro-level requirements for daily
operation derived from a generic grid model. The results
indicate that the environmental impacts of employed power
electronics are substantially reduced by operating a
microgrid based on dc power distribution infrastructure. Our
sensitivity analyses show that efficient dc microgrids
particularly lead to savings in climate change impact
emissions. In addition, our study shows that the scaling of
power electronics as it is currently state of the art in
LCAs leads to inaccurate results. Therefore, our developed
method applies a more technical approach, which enables a
detailed analysis of the environmental impacts of power
electronic components at system level. Thus, it lays the
foundation for an evaluation criterion for a comprehensive
assessment of technological changes within the framework of
energy policy objectives.},
cin = {IEK-STE},
ddc = {620},
cid = {I:(DE-Juel1)IEK-STE-20101013},
pnm = {1112 - Societally Feasible Transformation Pathways
(POF4-111)},
pid = {G:(DE-HGF)POF4-1112},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000707887700001},
doi = {10.1016/j.apenergy.2021.117878},
url = {https://juser.fz-juelich.de/record/897412},
}