The present study presents a numerical simulation of the effects of using self-recuperative burners on the performance of a walking-beam reheating furnace. The study was done using CFD (Computational Fluid Dynamics) simulations where a low computational cost method was implemented to simulate the billet heating as a steady state system. The preheating temperature of the air was defined as a function of the air mass flow and the flue gas temperature in each burner, using a UDF (User-Defined Function).

This research involves a knocking effect analysis of the operation and performance of a spark ignition engine with high compression ratio using a blend of 50% biogas with 50% natural gas. A diesel engine was converted to spark ignition mode. During testing, the output power, equivalence ratio, fuel blend composition and engine speed were kept constant while the spark timing was modified. Three knock intensities were evaluated using three different spark timing to evaluate the combustion parameters and engine performance. Eighteen tests were developed for repeatability analysis.

The increase of energy efficiency is an option to reduce greenhouse gas emissions (GHG). This benefits the industrial sector by reducing the energy consumption required to manufacture products, increasing production levels, and improving the competitiveness of the industry at a national and international level.

Surface-stabilized combustion (SSC) is a fuel-flexible technology that extends the stability limits of lean premixed systems, while achieving ultra-low emissions of NO_x, CO and UHC (unburned hydrocarbons). To evaluate these attributes, the present study quantifies (1) operability characteristics i.e., lean blowoff limit and flashback behavior and (2) pollutant emissions (CO, N₂O, NH₃, NO and NO₂) of a commercial SSC burner when operating at a fixed fire rate on a wide range of fuel compositions.

​Desde el día lunes 15 hasta el jueves 18 de enero, se llevará a cabo el Seminario Momentos Académicos Francisco Cadavid Sierra, donde el PhD Gilles Cabot, profesor asociado de la Université de Rouen Normandie, al intituto INSA de Rouen y al laboratorio 

The polytropic coefficient is an important variable for determining errors in pressure and volume measurements and for apparent heat release calculation in engine combustion analysis. For commercial gasoline-fueled spark-ignition engines and diesel-fueled compression-ignition engines, a wide understanding about the thermodynamic models and values of the polytropic coefficient exists; however, in other technologies, in which gaseous fuels are used, the pressure treatment strategies and heat transfer models should be adjusted to allow for a better calculation of the polytropic coefficient.

The use of high compression ratios on spark ignition engines enables the increase of thermal efficiency, but also contributes to the reduction of high load limit because of the higher auto-ignition tendency in the end-gas. Gaseous fuels provide a good option to expand the high load limits because of their high octane ratings, mostly in small engines. Biogas is a renewable fuel, mainly composed by CH4 and CO2 that exhibits high auto-ignition temperature and slow laminar flame speed.

This paper addresses the experimental and numerical modeling of NO_x emissions and lean blow off (LBO) stability limits of natural gas and biogas fuels reactions stabilized with a low swirl burner (LSB). The paper presents the methodology to set up a chemical reactor network (CRN) based on experimental results and computational fluid dynamics (CFD) simulations. The CRN is a simplified representation of the fluid dynamics and energy balance of the reactive gases in the boiler environment.

 El día jueves 9 de noviembre se llevará a cabo el Seminario Momentos Académicos Francisco Cadavid Sierra en donde el PhD Bassam Dally, profesor de la Universidad de Adelaide - Australia, nos estará visitando al Grupo y  dará una charla acerca de como su grupo de investigación trabaja de la mano con el gobierno y la industria. A esta charla están todos invitados. 

  En el marco de Momentos Académicos Francisco Javier Cadavid Sierra el grupo GASURE invita este martes 31 de octubre a la conferencia titulada "The Influence of Oxygen Index on Sooting Behavior for Laminar Coflow ​Diffusion Flames", que sera dictada por el PhD. Andrés Fuentes, profesor asociado de la Universidad Técnica Federico Santa María de Chile.

Vea el resumen de la conferencia en el archivo adjunto.