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High-efficiency combustion of natural gas with 21–30% oxygen-enriched air
This investigation was aimed at studying the influence of 21–30% oxygen concentration on the heating rate, emissions, temperature distributions, and fuel (natural gas) consumption in the heating and furnace-temperature fixing tests. Increase in the oxygen concentration led to a more rapid heating ra...
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Published in: | Fuel (Guildford) 2010-09, Vol.89 (9), p.2455-2462 |
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Main Authors: | , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | This investigation was aimed at studying the influence of 21–30% oxygen concentration on the heating rate, emissions, temperature distributions, and fuel (natural gas) consumption in the heating and furnace-temperature fixing tests. Increase in the oxygen concentration led to a more rapid heating rate and lesser fuel consumption due to lower levels of the inert gas (N
2). When the oxygen concentration was increased from 21% to 30%, the heating rate was increased by 53.6% in the heating test and the fuel consumption was reduced by 26.1% in the furnace-temperature fixing test. Higher oxygen concentrations yielded higher flame temperature; hence, the NO
x
emission increased with increasing oxygen concentration. However, the increase of NO
x
emission in the furnace-temperature fixing test was less than that in the heating test. Moreover, the NO
x
emission was more sensitive to the excess oxygen at higher oxygen levels. The CO
2 concentration in the flue gas increased linearly with the oxygen concentration. Additionally, the temperature distributions became progressively nonuniform with increasing oxygen concentration because the convective heat transfer coefficient was altered. |
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ISSN: | 0016-2361 1873-7153 |
DOI: | 10.1016/j.fuel.2010.02.002 |