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For a new solar flat-plate collector, which is composed of plane glass plates, two aspects of the development are illustrated. Firstly, the fluid distribution is examined for the occurrence of the heat-carrier fluid in the space between the plates. Starting from a circular port a volumetric flow should be generated through the interspace between the panes. For this, different geometries are analyzed. The distribution is optimized with regard to the full-volumetric flow and the pressure loss. Secondly, the natural convection is examined between the panes of the insulating layers by using...
Full CFD/CHT calculations, even including additionally combustion, are today an important step in the design process of modern gas turbines. Based on comprehensive models a numerical testing of major components is today possible within reasonable time and detection of design deficiencies becomes possible in an early stage. Thus, it is possible to reduce the number of costly hardware testing steps. Major examples in the presentation deal with the topics of comprehensive calculations for pre-mixed can-type combustors and conjugate heat transfer analyses of complex cooled 1st stage vanes and...
Lubricating-oil cooler is an important object in supporting operable state and environmental safety of turbines. Heat transfer surface of cooler contacts steam-turbine oil and contains some hundreds (or thousands) finned-tubes. Cooling agent (water) flows in the tube. That is the reason why the objective of creation economic (for computational resource and time calculation) computational model in STAR-CCM+ is important. At the same time, the model should provide design of the tube bank and mass and volume parameters of the cooler. Two ways were considered for solving this task. At the first...
The LED technology is developing rapidly, resulting in even higher efficiencies and hence a greater increase in the generated light output. As the light emitting surface (die) area is of the order of some square millimetres, high radiant flux densities in the visible part of the spectrum can be observed. Abnormally high temperatures of the phosphor or of the optics can arise from an accidental absorption of the light, caused due to the presence of insects or foreign particles in the immediate vicinity of the LED. This can lead to a failure of the LED module. STAR-CCM+ and its multi-band...
Our CFD research focuses on electronics cooling of high power density packages (~1kW/m^2) where computer cooling fans provide forced air convection and a heat exchanger/cold plate assemblage, which has a pumped fluid loop integrated within it, employs internal fluid flow to serve as an effective heat sink for the power dissipation. Our current research is aimed at modeling the heat exchanger/cold plate apparatus from k-core (k = 1100 W/m-K) material and hence showing the positive effects k-core has on enhanced heat transfer spreading. Also we are looking at fault simulations, i.e. thermal...
This presentation looks at the state of the art of simulation technology in the field of thermal and electrochemical modeling of battery cell, module and packs. Thermal modeling of complex three-dimensional systems can be considered a mature field and deployed to address many applications but the addition of electrochemistry to this system is a recent advance. This advance adds many considerations and layers of complexity, which an engineer needs to consider when conducting simulations. The presentation will highlight the critical aspects of such simulations and highlight their importance...
Hydrogen powered fuel cell vehicles are a zero emission alternative to conventional gasoline or diesel vehicles. Their number is expected to rise significantly in the next few years. Hydrogen fueling is as fast as gasoline fueling (3 minutes). However, refueling process is challenging due to the high gas pressure (70 MPa), high velocities and varying ambient conditions. Our presentation will demonstrate how STAR-CCM+ was used to optimize the fueling process and define the world wide fueling standard SAE J2601. Our model is able to predict mass flow, pressure and temperature over time and to...
A promising alternative to fossil fuels would be the utilization of a fuel cell as a powertrain for vehicles instead of a combustion engine. Inside the fuel cell, the reaction of hydrogen at a catalyst is used to convert chemical energy into electric energy and heat. This new technology offers a great potential for optimizing the components of this system. Reasonably, the on-going process can be realized with CFD-simulations. It is a matter of common knowledge that the water content of the membrane influences proton conductivity. An option to ensure the supply of water, and to protect the...
In this work, we investigated the specially resolved heterogeneous catalysis of the Dry Reforming of Methane (DRM) in terms of CFD simulations. A catalytic, spherical fixed-bed reactor is simulated with a small tube-to-particle-diameter. The randomly packed bed (D = 16.2 mm, dP = 4 mm, H = 40 mm) was generated using the Discrete Element Method (DEM), which consists of 113 mono-disperse spheres. A detailed reaction mechanism is implemented involving 42 irreversible reactions with 12 surface-adsorbed species and 6 gas phase species. The chemical composition equations are calculated by DARS-CFD...
Upfront CAE studies performed as early as possible within the design and development process are required for thorough design explorations and formal optimizations. In this presentation, a novel approach is presented in which STAR-CCM+ is coupled with CAESES and an automated shape optimization is performed. The case study is that of a top entry mixer which is typically used in the process and chemical industries. The coupling of the softwares along with the process chain is elaborated and the resulting mixer shapes are compared to standard designs used in industry today.

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