Water-In-Oil Emulsion as Boiler Fuel for Reduced NOx Emissions and Improved Energy Saving

Hsuan, Chung Yao; Hou, Shuhn-Shyurng; Wang, Yun Li; Lin, Ta Hui

doi:10.3390/en12061002

Cited by 9 publications

(1 citation statement)

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“…Fuels with low volatility are almost impossible to ignite under atmospheric conditions, hence it is a common practice that the warmup and shutdown procedures of the combustion chamber are performed by using a conventional light fuel [18], such as diesel oil in transportation and natural gas in power generation. The evaporation of the above-mentioned water-oil emulsion, exploiting micro-explosions, was studied by Hsuan et al [32], demonstrating the quicker evaporation of heavy fuel oil (HFO) sample compared to neat fuel utilization. The evaporation of heavy fuels is still less known, since the outer surface of the droplet might solidify even for kerosene gel [33].…”

Section: Introductionmentioning

confidence: 99%

Experimental Comparison of Diesel and Crude Rapeseed Oil Combustion in a Swirl Burner

Józsa

2020

Applied Sciences

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In pursuing maximum energy efficiency, local utilization of various crude fuels came into view. The present paper compares the combustion characteristics of standard diesel oil and crude rapeseed oil; the latter is an excellent model for high-viscosity liquid fuels. The combustion tests were performed in a 15 kW atmospheric turbulent swirl burner; the liquid fuels were atomized by a plain-jet airblast atomizer. Firstly, the acoustic signal is evaluated, since the instabilities of swirl combustion are accompanied by characteristic pressure fluctuations. The spectral analysis was performed by Wavelet transform, which fits excellently to the acoustic spectrum of combustion noise. This multi-scale technique features increased spectral resolution at lower frequencies at the expense of lower temporal resolution, providing excellent performance at both low-frequency, well-localized components and high-frequency, broadband phenomena. The joint probability density function of two characteristic frequencies was plotted with the result that flame acoustics match for the two fuels. Secondly, their pollutant emissions were compared and evaluated under similar conditions with the conclusion that crude rapeseed oil can substitute diesel oil in a limited operating range. Note that the distinct material properties already mean differences in all atomization, evaporation, and mixing characteristics, hence, the latter result is not intuitive.

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Section: Introductionmentioning

confidence: 99%