Objective
Numerical codes have been developed:
The Coherent Flame Model has been implemented in the CFM code. Originally the CAST code was used as the CFM description but it cannot describe the flow field in an industrial boiler in which a number of obstacles are present. As a consequence a new code has been written for simulation of the combustion. It has been validated by comparing the code results to measurements made on a research burner.
A combustion code based on the well stirred burner (foyer homogène) has been developed. Work has been done to extend the use of the well stirred burner model for describing a diffusion flame where large variations of gases (CO2, H2O and hydrocarbons) concentrations take place. The code has been simplified to be able to describe the chemical reaction with high accuracy in order to be able to accurately describe the formation of pollutants such as CO and NOx.
Physical analyses have been performed and models for heat transfer developed:
Physical models for convective and radiative heat transfer have been developed and implemented in the code. The radiative model used has been adapted and validated for description of industrial burners where large variations of gases (CO2, H2O and hydrocarbons) concentrations take place.
New experimental procedures have been developed:
Continuous gas sampling and C2 Emission tomography have been developed, tested and used on a boiler. A description of the equipment specification has been done to allow the installation of the experimental techniques at the SMEs.
Gas sampling cartography has been developed and measurements done in the same boiler. Data acquisition and data processing codes have been demonstrated. It has been built in such a friendly way, that non specialized technicians can use it. Comparison between the results of the data delivered by the optical method and the gas sampling, shows that these methods are complementary and give interesting results for the conception of new burners.
Design, development and testing of prototypes:
Some new designed boilers were constructed and tested. The conception is fully integrated, the injection of the fuel, air and the design of combustion chamber are all taken into account. This procedure allows to optimize all the parameters in one step. The mixing of the fuel and air is optimized, within a combustion chamber geometry, so that the pollutant formation is reduced. For the same purpose the heat transfer between the combusting flow and the walls of the boiler have been optimized. Promising results were achieved.
Fields of science
- natural sciencesearth and related environmental sciencesphysical geographycartography
- natural scienceschemical sciencesorganic chemistryhydrocarbons
- engineering and technologyenvironmental engineeringenergy and fuelsfossil energynatural gas
- natural sciencesearth and related environmental sciencesenvironmental sciencespollution
- natural sciencescomputer and information sciencesdata sciencedata processing
Topic(s)
Data not availableCall for proposal
Data not availableFunding Scheme
CSC - Cost-sharing contractsCoordinator
77100 Meaux
France