Análisis de parámetros de combustión en prototipo de quemador radiante de GLP experimental sin recuperación y su influencia sobre el aprovechamiento energético

Abstract

This project proposes the variation of combustion parameters as fuel pressure and injector design in an experimental LPG radiant burner prototype without recovery, to determine its influence on: energy using, flame parameters and temperature distribution in the radiant tube. The methodology combines theoretical and experimental analysis, using this measurement instruments: thermographic camera and gas analyzer. The characteristics prototype are 1.79kW power, length 1.1m, tube diameter 0.10m and injector diameter 0.5mm. The energy using includes: heat transfer 0.59 kW by natural convection and 1.05kW by radiation, losses 0.98 kW by combustion gases, 0.0918 kW by convection in walls and 0.037 kW in unburned solids, this represents a thermal efficiency between 43 and 62 percent. A real combustion reaction with 127 percent of theoretical air is proposed, which allowed identifying a radiant medium zone with thermal stability of 0.45 m length and maximum temperatures between 320 to 460 Celsius degrees reached in 660 seconds (11 min) approximately. An analysis with a bidimensional model for the internal gas flow was applied to simulate the behavior of temperature, density, velocity, and particle trajectory.