Desenvolvimento de um forno com a tecnologia combustão de filtração operando com gás natural veicular

Abstract

This research dealt with the development of a non-conventional oven, built from the application of “Filtration Combustion Technology-CF”, also known as “Combustion in porous media-CMP”, operating with the burning of natural gas vehicles (NGV). This differs from conventional technology because the reaction occur in the interstices of a porous matrix, which can be inert or catalytic. Another factor is that this technology does not require the traditional burners burners, there is no maintenance of the combustion process, occurred because of clogging of the nozzles. The porous matrix (or porous medium) used in the experiment were foams of silicon carbide (SiC)and alumina balls (Al2O3). The function of porous matrix was storing part of the energy that would be released by the exhaust gases to preheat the new fuel-air mixture, in order to obtain a greater extraction of energy and ensure lower heat losses resulting from the combustion gases. The aim of this work was the development of a furnace used to CF technology as a source of heating in the burning of the GNV. The structure built from the furnace was composed of a heating chamber and fuel tested was the GNV. A fuel-air mixture (natural gas) was inflated in the Chamber, with a flame front moving in porous bed. Thereby, the combustion gases that would normally be released unburned exhaust were absorbed by the porous medium (SiC), with high thermal capacity to store and recirculate the heat. The energy stored in form of heat was transferred through the simultaneous processes of conduction, convection, and radiation to the internal compartment (chamber) where the substrate (glass) which was heated up to a temperature of 600 ° C. The experimental results indicated a 1.713 kW burning rate for an equivalence of ɸ = 0,86, and a speed of gas flows 0,35m/s. Income derived in the furnace was 36 % about the energy and supplied.