Conference PaperPDF Available

Solar activated envelopes in district context – energy modelling tasks

Authors:
  • Technische Universität München (TUM) - Universidad de Sevilla (US)

Abstract

The research project Cleanvelope aims to investigate how building envelopes can be energetically activated in terms of solar energy production. The focus is to show local and smart use of solar power including marketable interactions with the power grid and to identify the impact on urban microclimate. For this, the presented model structure has been developed. The aim of this approach is to deliver an energy model that is suitable for identifying the effect of solar activated facades in urban district context, using all options of flexibility within the system, and producing results that can be put together with architectural and microclimate investigations. This project is sponsored by the Bavarian Ministry of Science and the Arts in the context of Bavarian Climate Research Network (bayklif).
Shaping a Sustainable Energy Future
9th Colloquium of the Munich School of Engineering
August 1, 2019
Organizers of the Colloquium:
Felix Fischer
Stephanie Hopf
Lennart Reb
Wolf Wedel
Dr. Petra Liedl
Dr. Christoph Wieland
Picture Credits:
Title page; Uli Benz, TUM, 2017 Page
1; Astrid Eckert
Editor:
Prof. Dr. rer. nat. Thomas Hamacher
Director Munich School of Engineering
Technische Universität München
Munich School of Engineering
Lichtenbergstr. 4a
85748 Garching
http://www.mse.tum.de
Jurors:
Dr. Peter Tzscheutschler
Maximilian Keim
Sebastian Fendt
Michael Vollmer
Dr. Apostolos Vagias
Michael Kramer
Dr. Volker Körstgens
Dr. Petra Liedl
Dr. Cristina de la Rua Lope
Dr. Stefan DeYoung
Daniel Kierdorf
Anahi Molar-Cruz
Date of Publication:
July 2019
Download:
https://www.mse.tum.de
Technical University of Munich
Chair of Building Technology and Climate Responsive Design, Arcisstr. 21, 80333 München
www.ar.tum.de/klima, Tel.: +49 (0) 89 289 23980
Solar activated envelopes in district context –
energy modelling tasks
Lea Bogischefa, Manuel de-Borja-Torrejonb, Elisabeth Fassbenderc, Akhila Jambagid, Claudia Hemmerlee
alea.bogischef@tum.de, bmanuel.de-borja-torrejon@tum.de, celisabeth.fassbender@tum.de, dakhila.jambagi@tum.de,
eclaudia.hemmerle@tum.de
The research project Cleanvelope aims to investigate how building envelopes can be energetically activated
in terms of solar energy production. The focus is to show local and smart use of solar power including
marketable interactions with the power grid and to identify the impact on urban microclimate.
An important aspect of the project is that the analysis of the energy system should be coherent with other
project components including architectural und microclimate questions. A further challenge lies in including
all relevant energy components of the district within one simulation model and at a suitable level of depth.
This is important because by increasing the inflexible supply using solar power, the flexibility of other
components becomes essential. This is where the load-shifting potential of a partially electrified heat and
transport sector can play an important role and therefore needs to be included in the model.
To meet all of the criteria above, the model structure shown in fig. 1 has been developed. Weather data and
information about the district in terms of building structure and user behaviour are inputs to the modelling
elements. The next step is to derive the components for the optimisation from the input data. These include
conventional electricity loads, electric vehicle loads, thermal loads, photovoltaic electricity production and any
other supply and storage components. Furthermore, a holistic consideration should include the possibility of
grid-supportive behaviour, which is realized via external price incentives. To identify optimal schedules for
the flexible components a Model Predictive Control strategy is implemented which factors in predictions like
weather forecasts. The optimisation identifies the most cost effective and energy efficient operational
strategy, and provides schedules for all flexible components. In parallel to the optimisation, the influence of
solar activated envelopes on outdoor comfort will be based on the same scenario input data. Grasshopper
will be used as a platform to merge the different components of the analysis: it allows for data extraction from
3D-models and utilising the
returned optimisation results for
visualisation.
The aim of this approach is to
deliver an energy model that is
suitable for identifying the effect
of solar activated facades in
urban district context, using all
options of flexibility within the
system, and producing results
that can be put together with
architectural and microclimate
investigations.
This project is sponsored by the
Bavarian Ministry of Science and
the Arts in the context of
Bavarian Climate Research
Network (bayklif).
Figure 1: Model structure
16
... The overall workflow of the district model has been defined as part of the Cleanvelope project (Bogischef et al. 2019). It can be divided into three areas: consumers, producers and optimisation (Fig.1). ...
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An enormous flexibility potential for future energy supply systems lies within the thermal building mass. In order to represent this potential in district energy models, a suitable model has to be found. Various aspects support the need for segmentation of residential buildings into separate thermal zones. A systematic summary of the requirements regarding thermal models in the district context is given and the resulting modelling approach is discussed.
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