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@PHDTHESIS{Miehlich:1006494,
author = {Miehlich, Alexander},
othercontributors = {van Treeck, Christoph Alban and Nytsch-Geusen, Christoph},
title = {{G}raphbasierte {V}isualisierung komplexer technischer
{S}ysteme der {TGA} mit {BIM}},
school = {Rheinisch-Westfälische Technische Hochschule Aachen},
type = {Dissertation},
address = {Aachen},
publisher = {RWTH Aachen University},
reportid = {RWTH-2025-02484},
pages = {1 Online-Ressource : Illustrationen},
year = {2025},
note = {Veröffentlicht auf dem Publikationsserver der RWTH Aachen
University; Dissertation, Rheinisch-Westfälische Technische
Hochschule Aachen, 2025},
abstract = {To align with climate policy objectives regarding energy
efficiency and the integration of renewable energy sources
across the entire building life cycle, the requirements for
building systems installations are continually evolving. The
technical domains of heating, cooling, air conditioning, and
plumbing are becoming increasingly complex, further
complicating information exchange and interdisciplinary
coordination. In the design phase, the dimensioning of
building services can be performed using BIM-specific CAD
software, generating both 3D models and 2D or image-based
representations. While these different representations serve
distinct purposes in the planning, construction, and
operational phases, they are not inherently interoperable.
The semantic relationships embedded in the original BIM
authoring software are necessary to maintain consistency
across formats, yet these relationships are often lost
during data exchange. Additionally, the increasing
complexity of building services make it difficult to
comprehend topological and functional relationships. These
relationships are not only difficult to model during the
design process but also challenging to visualize in exported
data formats. The lack of interaction capabilities further
limits the practical usability of data exchange formats.
This is equivalent to media disruption, which means that
plans of system components must be re-created manually in
further planning processes or even later in the building
life cycle. Unrestricted transparency of these re-created
media as well as the possibility of quality control is
therefore not given. Building on the challenges of
preserving topological and functional relationships across
different representations, this dissertation addresses the
automated derivation of flow diagrams from BIM models to
maintain critical information throughout the building life
cycle. It introduces novel graph-based methods that, within
the framework of a Big Open BIM approach, enable the fully
automated generation of highly dynamic flow diagrams for
building systems installations, ensuring consistency and
usability across planning and operational phases. This
improves inefficient, manual work steps that require a high
level of expertise and introduces an interactive method for
engaging with flow diagrams, facilitated by the underlying
graphtheoretic framework. The methods developed establish a
conceptual, scientific and technology-open basis for the
future digitalization of communication, documentation and
quality assurance across the building life cycle phases,
leveraging BIM models as a central information source. The
implementation of an interactive, webbased proof of concept
demonstrates the application of these methods, utilizing a
command line-based package as an independent backend. Using
the proof of concept as a tool, it demonstrates the fully
automated generation of dynamic and interactively usable
graph-based visualizations in the domains of heating,
cooling, air conditioning and plumbing. Future applications
for the methods include the automated creation of digital
and machine-readable requirement specifications, the
targeted querying of any functional or topological
relationships between components, or the creation of parts
lists for systems, sections or zones. In this thesis, this
is demonstrated on the basis of the visualization methods
developed in the web-based proof of concept using two use
cases. The visualization of a selected system shows the
usage of visual reduction to selected functionally and
topologically related components. The generation of a parts
list based on a reduction is shown in the other use case.
This work shows that the graph-based visualization of
complex technical systems of building systems installations
opens the possibility to generate dynamic and interactively
usable schemata for a variety of practical use cases while
maintaining machine and human readability without media
disruptions.},
cin = {312410},
ddc = {624},
cid = {$I:(DE-82)312410_20140620$},
typ = {PUB:(DE-HGF)11},
doi = {10.18154/RWTH-2025-02484},
url = {https://publications.rwth-aachen.de/record/1006494},
}
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