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ASCOMP GmbH provides consulting services in the broad energy segment, be it in the conventional or in the renewable contexts. TransAT-based consulting activities in the conventional-energy area involves the detailed simulation of fluid flow and heat transfer with mass transfer processes pertinent to conversion and transport, including gas and steam turbines, heat exchangers, combustion chambers, etc. The TransAT Suite products are also used in the renewable energy segment, including the design of chemical looping combustion systems, combustion efficiency and NoX control. With the coupled heat conduction-convection-radiation module in TransAT Multiphysics, various problems related to solar energy absorption were solved, including solar natural convection towers.

Energy Conversion

In the field of energy conversion and production, our team of modelling consultants has been involved in various industrial projects in areas as broad as wind and hydro power, thermal management in energy storage systems, and steam and gas turbines and flow in combustion chambers. While in the classical compressor-turbine rotating machinery they typically focus on minimizing viscous losses and increasing efficiency via CFD-enabled blade design, in the steam turbine segment, however, recent key studies involve simulating condensing flows in the last stages of steam turbines. While the mainstream is still looking at phase average models, we at ASCOMP prefer to resort to interface tracking approaches. Movie

Flow and Condensation Heat Transfer in Multi-Stage Flash Condensers

The continuous depletion of underground water resources have led to water shortages at alarming rates. Therefore, seawater desalination has become the only viable way to shrink the deficit in water supply. Seawater desalination technologies most widely used are thermal and reverse osmosis (RO). Thermal desalination is the earliest seawater desalination technique which is (for economical reasons) often integrated with power generation plants. The main commercial thermal desalination processes are: Multi-stage flash (MSF) and Multi-effect distillation (MED). Other thermal processes have been developed such as solar desalination, freezing and humidification-dehumidification. Our simulations were revealed very helpful in designing MSF condensers employed in water desalination plants. Movie

Thermal Management in Electronics

Thermal management is a major issue in modern electronic industry; all the more the technology produces novel solutions featuring reduced size components operating at higher speeds. As a consequence, temperatures within the integrated circuit are ever-growing, leading to a rapid deterioration of the device performance and reliability. Various cooling techniques have been developed, most of which fail to cope with the heterogeneous temperature distributions in the circuits, with reduced capacity to remove ‘sudden’ large amount of heat generated by hot spots. Alternative techniques are under development, including ‘digital microfluidics’ fluid handling, which relies on two-phase flow cooling, by means of liquid films flowing along the substrate, monitored using various means (e.g. anisotropic heat conduction using crystal films). Movie

Combustion efficiency

Advanced CFD simulations are now conducted to help infer subtle modifications to various combustion processes – flares, thermal oxidizers, boiler burners, process burners, internal engine combustion – to minimize exhaust gas volumes and the generation of noxious gases and thus improving the overall efficiency of the systems. To be at the forefront of the combustion simulation technology, our developers implemented a hierarchy of reaction models, ranging from Infinitely Fast Chemistry to Finite Rate Chemistry processes, using for the first EDC models, and for the latter a Flamelet based approach.

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