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Modelos de simulaciones de dinámica de fluidos computacional (CFD) para procesos oxicombustibles en hornos de alta temperatura

Resumen

Tipo:
Oferta Tecnológica
Referencia:
TODE20160610001
Publicado:
23/06/2016
Caducidad:
23/06/2017
Resumen:
Institutos de investigación alemanes han desarrollado técnicas no invasivas basadas en láser de medición de temperatura mediante dispersión Raman anti-stokes coherente (CARS) para plantas de procesos oxicombustibles a gran escala. Estas técnicas permiten realizar medidas precisas en hornos industriales de alta temperatura (T>2000°C). También se han desarrollado modelos de dinámica de fluidos computacional. Se buscan socios interesados en establecer acuerdos de cooperación técnica con el fin de mejorar estos modelos y aplicarlos en la industria.

Details

Tittle:
Models for computational flow dynamics (CFD) simulations for oxy-fuel combustion processes in high temperature furnaces
Summary:
A group of German research institutes has developed non-invasive laser-based coherent anti-stokes raman scattering (CARS) temperature measuring techniques for large-scale oxy-fuel process plants. This allows for precise measurements in large industrial high temperature furnaces (T>2000°C). Also models for computational flow dynamics have been developed. Partners are sought for technical cooperation agreements to further improve these models aiming at application on an industrial level.
Description:
In many areas of high temperature process engineering the so-called oxy-fuel combustion technology becomes more and more common, for example in metal processing or glass industry. Oxy-fuel combustion is defined as the process of burning a fuel using pure oxygen instead of air as the primary oxidizer. This allows for a higher combustion temperature and thus a higher energetic efficiency and less exhaust gas loss.

At the same time, computational flow dynamics (CFD) simulations are an important tool to optimize the design of the process plants and to model the combustion processes by predicting relevant parameters such as speed, temperature, heat release and species concentrations. Industry depends on reliable predictions about energy consumption and pollutant emissions before investing in their infrastructure in order to be competitive. However, the CFD simulations used for conventioal gas-air-combustion are not suitable for oxy-fuel combustions since the simplified reaction mechanisms limit their applicability.

A group of German research institutes has developed and demonstrated reduced reaction models for CFD simulations which are more suitable for oxy-fuel combustions in high temperature environments. The usability of non-adiabatic stationary flamelet-models with regard to oxy-fuel combustion was examined and demonstrated. The problem of heat losses is especially present in oxy-fuel combustion processes. Ways to better integrate heat losses in flamelet-models were compared and assessed. Species and temperature concentrations are qualitively and quantitatively well described, also in the zone close to the burner mouth.
The coherent anti-stokes raman scattering (CARS) proves to be especially suitable for precise high temperature measurements (T>2000°C). The vibrations-CARS-thermometry- was further developed to be applied also in large-scale oxy-fuel combustion systems and successfully demonstrated (concentric beam guidance). Non-invasive laser-based CARS measuring techniques proved to be suitable. Furthermore, CO and O2-molecules have been compared with regard to their usability as a signal source for combustions and have been integrated in the software.

The German research institutes seek industrial partners to advance their research and integrate the findings into their products/processes within technical cooperation agreements. This can include companies from the thermal processing industries (especially metal or glass manufacturing) that want to optimize the efficiency level of their furnaces or combustion systems or producers of furnaces or burners.

Also research organisations from the area of reaction kinetics and combustion modelling are sought for technological cooperation agreements, for instance for a further reduction of the developed model and research on radiation heat transfer models for oxy-fuel combustion processes. Software partners are sought for the inclusion of the developed non-adiabatic oxy-fuel flamets in commercial CFD codes.
Advantages and Innovations:
- Optimization of furnace and burner geometries leads to significant energy and cost savings by the use of precise and cost-efficient reaction models before designing or building oxy-fuel combustion systems
- Shortened simulation time ("days, not weeks") compared to conventional solutions
- Minimization of production failures by avoiding unsuitable process plants for oxy-fuel processes
- Better heat transfer by adjusting furnace to heat material, thus saving primary energy and reducing CO2-emissions compared to conventional solutions
- Reduction of NOx -emissions by using oxy-fuel systems
Stage of Development:
Field tested/evaluated
IPs:
Secret Know-how

Partner sought

Type and Role of Partner Sought:
The German research institutes seek industrial partners for technical cooperation agreements to further improve these models aiming at application on an industrial level. This can include companies from the thermal processing industry (especially metal or glass processing) that want to optimize the efficiency level of their furnaces or combustion systems or producers of furnaces or burners.

Also research organisations from the area of reaction kinetics and combustion modelling are sought for technical cooperation agreements, for instance for a further reduction of the developed model and research on radiation heat transfer models for oxy-fuel combustion processes.

Client

Type and Size of Client:
R&D Institution
Already Engaged in Trans-National Cooperation:
Si
Languages Spoken:
English
German

Keywords

Technology Keywords:
04003001 Combustibles fósiles gaseosos
04007001 Gestión de la energía
04007003 Optimización de procesos, utilización de energía residual
01003016 Simulaciones
04002004 Tecnologías de hornos y calderas