Christoph Nytsch-Geusen

• Prof. Dr.-Ing.
• Berlin University of the Arts

Domain-overarching system models are crucial to investigate sector coupling concepts. Specifically, the coupling of building and electrical energy systems becomes crucial to integrate renewable energy sources such as photovoltaic power systems (PV). For such interdisciplinary simulation models, Modelica is a suitable language. However, most open-so...

Domain-overarching system models are crucial to investigate sector coupling concepts. Specifically, the coupling of building and electrical energy systems becomes crucial to integrate renewable energy sources such as photovoltaic power systems (PV). For such interdisciplinary simulation models, Modelica is a suitable language. However, most open-so...

Domain-overarching system models are crucial to investigate sector coupling concepts. Specifically, the coupling of building and electrical energy systems becomes crucial to integrate renewable energy sources such as photovoltaic power systems (PV). For such interdisciplinary simulation models, Modelica is a suitable language. However, most open-so...

In this paper, the possibility of reducing the energy demand of the typical multi-family buildings in Amman, Jordan utilizing passive design strategies are investigated through a parametric simulation study. Firstly, the energy demand of the multi-family buildings under the typical practice is evaluated, after that several design strategies are pro...

This paper describes the development process of a test bed for an interactive VR (virtual reality) environment for indoor climate simulation of buildings. The basic idea is to reproduce the simulated indoor climate of a thermal room model in a climate chamber with the help of air conditioning devices and thus to make the indoor climate directly phy...

This paper describes a way to generate a great amount of data and to use it to find a relation between a room controller and a certain room. Therefore, simulation scenarios are defined and developed that contain different room, location, usage and controller models. With parameter variation and optimization of the corresponding controller parameter...

Im vorliegenden Beitrag wird ein Ansatz beschrieben, bei dem der Modellierungs‐ und Simulationsprozess für das Innenraumklima von Gebäuden vollständig in einer Virtual Reality (VR)‐Umgebung stattfindet. Auf diese Weise wird der Simulationsexperte bezüglich des Raumdesigns, der räumlichen Wahrnehmung und der Interaktion mit dem Raummodell immersiv e...

The Kinetic Battery Model is an elaborated model to mimic the behavior of electro-chemical batteries. It assumes two "wells" inside a battery. One pretends to hold the available, the other the bound energy. Once the available energy well is empty or charged, energy has to be delivered from/to the bound energy well (Manwell and McGowan (1993). This...

Strategisches Ziel des Verbundvorhabens WaveSave ist die Unterstützung einer nachhaltigen, ressourcenschonenden und wirtschaftlichen Nutzung von Energiesystemen zur dezentralen Strom- und Wärmeversorgung in Gebäuden. Dazu werden geeignete Planungs- und Steuerungstechniken entwickelt, um verschiedenartige Energiesystemkomponenten für den späteren Be...

This book is describing the results of the research project Open eQuarter. The works focussed on how to acquire reliable energetic data about each single building of a district by analyzing public geo-information-services such as the fis-broker of the city of Berlin. Furthermore theoutcomings were validated based on a dataset of a real district are...

Bei der Modellierung und Simulation von Gebäuden sind oft Kompromisse zwischen Genauigkeit und Re-chenzeit notwendig. Aus Gründen der Performanz sind 1D-Modelle zu bevorzugen, während aus Sicht der Genauigkeit von Ergebnissen 3D-Modelle verwendet werden sollten. Strukturvariable Simulationen stellen einen Ansatz dar, nur dann komplexe und rechenint...

Die Modelica-Modellbibliothek BuildingSystems wird für die dynamische Simulation des energetischen Verhaltens einzelner Räume, mehrzoniger Gebäude oder ganzer Stadtquartiere entwickelt. Die Simulationsmodelle der Bibliothek beschreiben die dynamische Energiebilanz der Gebäudehülle unter Berücksichtigung der Gebäude- geometerie, der thermischen Eige...

The simulation of entire city districts asks for a large number of descriptive parameters for all considered buildings. These buildings are often represented by models using only one thermal zone and few subcomponents in general. This is why parameter sets that describe a district are as dependent on the model being used as on the actual building....

In modeling and simulation of building systems compromises between accuracy and simulation time are often necessary. For performance reasons one would like to use 1D models, but for the sake of accuracy 3D models would be preferred. The 3D models usually have an unfeasible long simulation time. In this paper we propose using variable-structure mode...

This paper describes the collaborative development of the Annex 60 Modelica library, a free, open-source library for building and community energy systems. The library is developed within the Annex 60 project that is conducted under the umbrella of the International Energy Agency's Energy in Buildings and Communities Programme (IEA EBC). Our goal i...

Aquifer thermal energy storages (ATES) are a promising technology for seasonal thermal energy storage which can bridge the gap between constant production and seasonally varying demand. This paper presents first simulation results of an energy concept proposed for the university campus Berlin-Charlottenburg, which is characterized by the combinatio...

For the simulation of the thermal energy consumption of university campus Berlin-Charlottenburg Modelica-models for buildings, installations and local heat distribution networks are discussed. In a subsequent project phase these models will be simulated in conjunction with models for an Aquifer Thermal Energy Storage (ATES) and an absorption heat t...

Am Lehrstuhl für Versorgungsplanung und Versorgungstechnik der UdK Berlin wird die Modelica-Modellbibliothek “BuildingSystems“ zur objektorientierten Modellierung und Simulation komplexer energietechnischer Gebäudesysteme entwickelt. Die Modelle der Bibliothek decken ein breites Spektrum aus den Bereichen Raum und Gebäude, solare Energietechnik (So...

The aim of the Young Cities Team 2 sub-project “Energy Infrastructure systems” consists of the development and the design of energy efficient buildings and energy supply systems for new Towns in Iran. This document gives an overview over the design and the development of the energy supply systems for the 35 ha pilot area in Hashtgerd New Town. In g...

Modelica3D is a platform-independent, free Model- ica library for 3D visualization. Its implementation is based on a message-passing architecture. Through its loosely-coupled architecture, Modelica3D can be combined with different rendering-tools. It is also

This paper presents methods and strategies about how to model and simulate and optimize the energy demand and the energy supply of whole urban districts. For this purpose, different specialized modeling and simulation tools with different levels of detail, are combined to a higher strategy. To reach sufficient results for complex urban district mod...

The new Modelica library FluidFlow is being developed for the thermo-hydraulic simulation of complex energy supply systems. This library includes standard hydraulic model classes and specialized components for HVAC-systems and solar thermal systems. Most of these Modelica classes are modelled with equations of the 1D-transient energy transport. The...

Die Entwicklung energetisch optimierter Lüftungsstrategien für feuchtebedingte Probleme bzw. die Planung und die Sanierung energiesparender Gebäude benötigt eine genaue Kenntnis über das hygrothermische Bauteil‐ und Gebäudeverhalten. Diese Fragestellungen können vor der eigentlichen messtechnischen Ausführung mit Hilfe von Simulationstools beantwor...

A benchmark library is presented which collects models for testing and comparing different analog and hybrid simulators as well as their numerical simulation algorithms. Many of these models are described with Modelica and simulated with Dymola and the Modelica-related simulator Mosilab. But VHDL-AMS descriptions are also used to compare simulation...

The indoor temperature and humidity conditions of the building envelope are important parameters for the evaluation of the thermal and hygric indoor comfort. In the research project GENSIM a new hygrothermal building library, based on the object- and equation-oriented model description language Modelica® has been developed by the Fraunhofer Institu...

EOOLT'2007 was the first edition of the ECOOP-EOOLT workshop. The workshop is intended to bring researchers associated with different equa- tion-based object-oriented (EOO) modeling languages and different application areas making use of such languages together. The aim of the workshop is to ex- plore common grounds and derive software design princ...

Zwei- und dreidimensionale dynamische thermische Bauteilsimulationen unter Berücksichtigung instationärer klimatischer Randbedingungen können das reale Bauteilverhalten in guter Näherung abbilden. Bisherige Werkzeuge zur mehrdimensionalen thermischen Bauteilsimulation weisen häufig Einschränkungen in den abzubildenden Bauteilgeometrien und -topolog...

1 Abstract The design and the optimization of complex techni-cal systems can be supported efficiently by using simulation methods and tools. For this reason, the generic simulation tool MOSILAB (Modeling and Simulation Laboratory) is being developed by a con-sortium of six Fraunhofer institutes in the GENSIM project. For the modeling process, MOSIL...

Low temperature cofiring ceramic (LTCC) combines hybrid technology, biocompatibility, chemical resistance and ease of fabrication to serve as a construction material for microfluidics. Due to the lack of CAD tools for MEMS this paper applies a model for the description of stationary flow in LTCC channels of non circular cross sections. Sample devic...

The current GENSIM project, which is being con-ducted by a consortium of six Fraunhofer Institutes, is developing the generic simulation tool MOSILAB for the analysis of mixed time-continuous / time-discrete (hybrid) models of heterogeneous technical systems. One major innovation here in terms of simulation technology is the mapping of state-depend...

The innovative goal of the GENSIM project is to develop a new generic simulation tool for hybrid models, which supports model structural dynamics. Model structural dynamics in this context means, the model structure (the number and types of equations) can change during the simulation experiment in dependency of events, which are triggered from the...

A new hygrothermal building model is being developed within the research project GENSIM by the Fraunhofer institutes FIRST and IBP. The model implementation takes place by using the object-oriented modeling language Modelica. As a starting point for the development of the new building model, the researchers used the physical models of the simulatio...

Anwendung der Modellstrukturdynamik für ein komplexes Werkzeugdesign.

This paper describes the results of a German re-search project, where a CAAD-program (Computer Architectural Aided Design) was integrated with two energetic building simulation programs to a software package for calculating and optimising the energy demand of CAAD-constructed buildings. The used key technology to transfer the huge num-ber of geomet...

Zugl.: Berlin, Techn. Universiẗat, Diss.

Simulation models of complex technical systems need beside the description of their physical behav-iors also a representation of their 3-dimensional ge-ometry and topology. Up to now, the Modelica lan-guage specification [1] includes only rules for 2D-primitives in form of specialized annotations. Start-ing from this point, this paper illustrates t...

Es wird am Beispiel einer Fahrzeugt¨ ursteuerung ein Prototyp der Simulati- onsumgebung Mosilab vorgestellt, die spezielle Modellierungstechniken f ¨ ur gemischt- kontinuierliche Systeme integriert und unterstutzt. Zentrale Grundlage von Mosilab ist die Sprache MOSILA, die eine Erweiterung der sich in der Standardisierung befindli- chen Modellbesch...

2 Fraunhofer-Institut für Rechnerarchitektur und Softwaretechnik, Kekuléstraße 7, D-12489 Berlin Einleitung Die Entwicklung neuartiger solarthermischer Anlagenkomponenten, aber auch die Planung und Auslegung großer solarthermischer Anlagensysteme erfordert häufig eine genaue simulationsgestützte Analyse des thermohydraulischen Verhaltens der zugrun...

In this article, we will present a new multi-level modelling approach to obtain higher precision in HVAC plant simulation models. For this purpose, two different levels of detail in modelling, the coarse component-based approach of Modelica and the detailed physical-based approach of Computational Fluid Dynamics (CFD) were combined. In a first use...

The research presents the potential of a new design approach prevalent among architects to address the notoriously difficult early design stage building performance assessment. Through the use of computer code (e.g. scripting), designers are becoming more and more able to automate the geometric description of architectural form. By extending this p...