This European research project has developed Modelica libraries in the field of Control, Safety, Electrical, Thermo Fluid, Mechanical and Vehicle Systems.
 

XRG contributed in two work packages and developed a non-commercial library for pressure loss and heat transfer correlations named FluidDissipation and the commercial HumanComfort library for air-conditioned zones.

Partner

The high value and innovative contents of the EUROSYSLIB libraries were achieved through a large-scale co-operation among 19 European partners from 5 European countries.

The humidity on airplanes has several positive but also negative consequences. A more humid air is positively affecting the passenger‘s comfort. At the same time it increases the condensation or the freezing of water on the cold surfaces and in the insulation. So a higher humidity is usually avoided. The condensate increases the weight of the airplane (up to several hundred kilograms for large aircrafts), causes corrosion and moves uncontrollably in the body of the plane (“rain-in-the-plane”). More negative consequences from condensation are:

• Higher fuel consumption due to the increased weight
• Short circuits and malfunctions
• Mould growth
• Decreased thermal insulation

The main goal of the research project was the examination of different insulation layers by means of numerical simulation. The cabin air humidity was optimized to reduce the negative impacts of condensation. Especially, the water and heat transport, the storage of humidity and the influence of the insulation were analyzed.

One of the important paradigm shifts in product development is the continuous utilization of one model during the whole product life cycle. This integrative approach allows a significant more efficient product development, since the product can be tested throughout all development stages.

The integrated holistic environment approach of model-driven development in the OPENPROD project generalizes model-driven approaches to include most aspects of product development. The most important concepts are:

• A holistic whole-product model-driven rapid development and design environment for both software and hardware, also including support for product business processes,
• Open source tools and components for open reusable solutions,
• Standardized model representation of products primarily based on Modelica and UML.

In this joined research project a software prototype has been developed. SyntHEX is a high performance software for the development of optimal heat recovery concepts even for the most complex processes. It assists engineers in the energetic analysis of process engineering systems and automatically generates concept alternatives for optimal heat integration. The implemented genetic algorithms, whose selection principle always evolves only the best solution, accomplish a particularly powerful optimization process. SyntHEX can be applied to any process engineering system that must be additionally heated and cooled. The simulation software is available for Windows, Linux and Mac OSX.

• The planning and optimization of process heat streams using SyntHEX minimize investment and energy costs
• SyntHEX provides optimal solutions with sub-networks, which can be easily integrated into existing processes, without increasing the susceptibility to failure
• SyntHEX is suitable for the optimization of existing and new installations
• SyntHEX increases process’s energy efficiency. Thus, it contributes to climate protection

XRG Simulation has developed in this Clean Sky joined research project two media models:

• Tetrafluoroethane (R134a)
• Moist Air (from -100°C to +250°C)

The media models were programed with Modelica. The Modelica.Media Interface is used. The models are free under the Modelica 2.0 license.

The research project “Dynamic investigation of Clausius-Rankine processes with CO2 capture for supply of operating reserve” has evaluated the processes for capture and storage of CO2. The focus of the study was the transient behaviour of the plant and the question: How can plants with CO2 capture contribute to the supply of operating reserve? The supply of operating reserve is very important for grid stability at rising fluctuation due to the expansion of renewable energy.

The Modelica library ClaRaCCS

The Modelica library ClaRaCCS was created during the research project. ClaRaCCS stands for Clausius-Rankine with Carbon Capture and Storage. The source code of the library is open. The following components were modeled in different detail levels:

• Basic components of heat exchangers (different fluids, typical plant geometries)
• Models of pumps, compressors and turbines (incl. transport of liquid CO2)
• Models of absorber and desorber columns, models of air separation systems
• Property models of flue gas and solvents
• Validation scenarios of the Clausius-Rankine process and the gas separation processes