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@PHDTHESIS{Merkelbach:781835,
author = {Merkelbach, Stephan},
othercontributors = {Murrenhoff, Hubertus and Schmitz, Katharina},
title = {{A}nalysis of the economic and ecological properties of
pneumatic actuator systems with pneumatic transformers},
volume = {96},
school = {RWTH Aachen University},
type = {Dissertation},
address = {Düren},
publisher = {Shaker Verlag},
reportid = {RWTH-2020-01561},
isbn = {978-3-8440-7161-0},
series = {Reihe Fluidtechnik. D},
pages = {xii, 131 Seiten : Illustrationen, Diagramme},
year = {2020},
note = {Zweitveröffentlicht auf dem Publikationsserver der RWTH
Aachen University 2022; Dissertation, RWTH Aachen
University, 2019},
abstract = {Pneumatic drives are used in a wide variety of industrial
applications. Recently, the life cycle costs (LCC) of the
actuators become more important in investment decisions as
the acquisition costs do not necessarily reflect the
drives’ economic efficiency. This thesis describes an
economic and ecological life cycle analysis of pneumatic
actuators. First, the LCC of the drives are estimated based
on typical load cycles and compared the LCC of comparable
electromechanical actuators. Therefore, the efficiency of
both drive types is compared based on the exergy concept.
Together with the acquisition costs and further cost
elements, the LCC are calculated depending on the load
cycles. Furthermore, an assessment of the reduction
potential for the exergy demand of the pneumatic drives is
executed by an experimental investigation of different
exergy saving measures with low installation effort which
can reduce the demand for compressed air and working costs
immensely while affording relatively low installation
effort. In addition to these measures installed in direct
vicinity to the drive, nowadays, the operation of the whole
pneumatic system at lower pressure gathers growing
attention. A lower system pressure leads to a reduction of
losses in the compressor. On the downside, the
implementation of larger drives to gain the same output
force and load stiffness is necessary. Some applications
still afford small drives with high force. To avoid the
implementation costs of an additional high-pressure system,
local pressure boosting by means of pneumatically driven
boosters is feasible. For this, double piston boosters are
state of the art. Their working principle implies high
exergy losses and noise emissions. The thesis presents the
development and functional testing of a novel pressure
booster concept based on pneumatic radial piston units. The
concept is evaluated in a simulation study and a functional
model is designed and manufactured. It is examined
experimentally and different optimisations to increase its
exergy efficiency are implemented and validated. As a
conclusion, the impact of low-pressure pneumatic systems
including pneumatic boosters on the overall efficiency and
the LCC of the drives is estimated. This includes drives
working at a reduced driving pressure as well as at boosted
high pressure. Facing climate change, the emissions of
greenhouse gases (GHG) become more important as an
additional parameter for the decision between different
drive technologies. Besides the economic analysis of the
drives, the thesis shows the results of a life cycle
analysis focusing on the GHG emissions for one exemplary
actuator including its whole life cycle from production of
the materials up to the recycling of the components after
their end-of-life.},
cin = {412810},
ddc = {620},
cid = {$I:(DE-82)412810_20180620$},
typ = {PUB:(DE-HGF)11 / PUB:(DE-HGF)3},
doi = {10.18154/RWTH-2020-01561},
url = {https://publications.rwth-aachen.de/record/781835},
}
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