A parametric study of spectral radiation of gas-fuel combustion media in 1-D furnace cases for energy utilization

This paper studies the spectral radiation characteristics of gas-fuel combustion media through numerical calculation from the perspective of radiative energy utilization. Based on accurate band model for gas radiation and the radiation transfer equation, one-dimensional cases representing flame temperature field are constructed to investigate the effects of different flame media parameters on the spectral radiative energy proportion and total radiative heat flux, including the temperature, total pressure, partial pressure, path-length, and molar ratio. The interactions between the parameters are also analyzed. The radiation energy quality is also properly analyzed based on the equivalent temperature theory. It is found that temperature is the dominant influencing factor. At an average temperature of 1600 K, the proportion of spectral radiation in the waveband of 0-3 mu m accounts for 55%. Increases in the total pressure, partial pressure, and molar ratio enhance the total radiative energy and short-wavelength radiation proportion. The total pressure and partial pressure have similar effects, but the molar ratio has a less effect, especially under high-pressure conditions. The equivalent temperature method can be used to compare the quality of radiative energy more conveniently. Increasing temperature is the most important factor in improving energy quality. This study provides a reference for spectral radiative energy management and future research on photo and thermal energy cascade utilization based on fuel combustion.

Automated summary

This paper studies the spectral radiation characteristics of gas-fuel combustion media through numerical calculation, analyzing the effects of temperature, pressure, path-length, and other parameters on the proportion of radiative energy and heat flux. The study also proposes methods to improve energy quality.