Chemiluminescence based operating point control of domestic gas boilers with variable natural gas composition

Ding, Yi; Durox, Daniel; Darabiha, Nasser; Schuller, Thierry

doi:10.1016/j.applthermaleng.2018.12.106

Cited by 18 publications

(5 citation statements)

References 21 publications

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“…Related to the work of Ahmadi et al, the Soltanian et al detected a peak of the intensities of OH* and CO 2 * at an ER of 0.8 for NG flames and a premixed gas boiler burner. Additionally, Ding et al detected a maximum of OH* intensity at an ER of 1.0 for flames of different fuel blends (pure CH 4 and mixtures of CH 4 with N 2 , CO 2 , H 2 , and C 3 H 8 ) in a burner similar to those in the studies referenced above.…”

Section: Resultsmentioning

confidence: 99%

Optical Analysis of Blast Furnace Gas Combustion in a Laboratory Premixed Burner

et al. 2022

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The use of blast furnace gas (BFG) as a fuel provides an alternative for waste stream valorization in the steel industry, enhancing the sustainability and decarbonization of its processes. Nevertheless, the implementation of this solution on an industrial scale requires a continuous control of the combustion due to the low calorific value of BFG. This work analyzes the combustion behavior and monitoring of BFG/CH 4 blends in a laboratory premixed fuel burner. We evaluate several stable combustion conditions by burning different BFG/CH 4 mixtures at a constant power rate over a wide range of air/fuel equivalence ratios. In addition, relevant image features and chemiluminescence emission spectra have been extracted from flames, using advanced optical devices. BFG combustion causes an increase in CO 2 and CO emissions, since those fuels are the main fuel components of the mixture. On the other hand, NO x emissions decreased because of the low temperature of combustion of the BFG and its mixtures. Chemiluminescence shows that, in the case of CH 4 combustion, peaks associated with hydrocarbons are present, while during the substitution of CH 4 by BFG those peaks are attenuated. Image flame features extracted from both ultraviolet and visible bandwidths show a correlation with the fuel blend and air/fuel equivalence ratio. In the end, methodologies developed in this work have been proven to be valuable alternatives with a high potential for the monitoring and control of BFG cofiring for the steel industry.

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Section: Resultsmentioning

confidence: 99%

Optical Analysis of Blast Furnace Gas Combustion in a Laboratory Premixed Burner

et al. 2022

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“…Flow of air and methane was controlled by flow meters (3) (an operating range for air and methane was 30 L/min and 10 L/min, respectively, with an error of 2% at full scale) and supplied to the premixing chamber via steel pipes. The burner was operated at different air equivalence ratios ranging from 0.8 to 1.4 in increments of 0.2 to recreate the combustion conditions used in small scale combustion systems [43,44]. The inlet parameters for fuel and air flows are given in Table 1.…”

Section: Description Of Combustion and No X Removal Systemmentioning

confidence: 99%

Application of Non-Thermal Plasma for NOx Reduction in the Flue Gases

et al. 2019

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Over the years, ever more stringent requirements on the pollutant emissions, especially NO X , from combustion systems burning natural gas are introduced by the European Union (EU). Among all NO X reduction methods, the flue gas treatment by plasma is widely applied and could be used for both small scale and domestic combustion systems. However, the removal efficiency depends on concentrations of oxygen, water vapor, traces of hydrocarbons, and nitrogen oxides in flue gas. In order to analyze the application of the NO X reduction for small-scale or domestic combustion systems, experiments of NO X reduction by non-thermal plasma from real flue gases originating from premixed methane combustion at different equivalence ratio (ER) values were performed. It was determined that the residual oxygen in flue gas plays an important role for improvement of NO to NO 2 oxidation efficiency when O 2 concentrations are equal to or higher than 6%. The power consumption for the plasma oxidation constituted approximately 1% of the burner power. In the case of ozone treatment, the addition of O 3 to flue gas showed even more promising results as NO formed during combustion was fully oxidized to NO 2 at all ER values.

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“…In comparison to laser measurements or traditional invasive probe-based diagnosis, CL-based optical sensors offer numerous advantages such as no interference with flames, low cost, rapid response, and straightforward equipment. Consequently, CL sensors are frequently employed for monitoring laboratory or industrial combustion devices − and to provide real-time feedback on important combustion parameters that include heat release rate, equivalence ratio, and fuel blending ratio. For example, Hardalupas and Orain and Gillet et al used the CL signal of OH* and CH* as HRR markers in hydrocarbon flames.…”

Section: Introductionmentioning

confidence: 99%

Excited Species as Heat Release Rate Markers in Laminar Premixed Ammonia–Hydrogen–Air Flames

Wei,

Zhu,

Tian

et al. 2024

Energy Fuels

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Accurate determination of the heat release rate (HRR) information in ammonia flames is pivotal for practical applications of ammonia fuel in industrial combustion devices. However, the direct measurement of HRR in real-world applications is extremely challenging. In this study, we employed numerical simulation with detailed chemistry to assess the potential of using excited-state species and combinations of excited-state and ground-state species as HRR markers in laminar premixed ammonia−hydrogen−air flames. Two criteria were defined to evaluate the performance of the targeted HRR markers. The study revealed that single excited-state species generally exhibited limited performance as HRR markers, particularly in predicting both the peak location and the width of HRR profiles over a wide range of conditions. Products of two species showed improved performance; specifically, [O 2 *][NH 2 *], [NH 2 ][NO 2 *], and [NH 2 ][NH 2 *] exhibited excellent performance in predicting both the peak position and width of HRR profiles across a broad range of flame conditions. Further improvements were observed with products of three species, as [NH 2 ][O 2 *][NH 2 *] and [NH 2 ][O 2 *][OH*] performed well in marking both the peak location and the width of HRR profiles across various conditions. The integrated products of the concentration for [NH 2 ][NH 2 *], [O 2 *][NH 2 *], [NH 2 ][O 2 *][NH 2 *], and [NH 2 ][O 2 *][OH*] showed positive correlations with integrated HRR intensity under lean conditions, suggesting their potential use for indirectly inferring HRR intensity of practical combustion devices operating under lean conditions. Challenges associated with measurements of O 2 * and the rationale behind the utilization of excited-state radicals as HRR markers are also discussed.

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Chemiluminescence based operating point control of domestic gas boilers with variable natural gas composition

Abstract: To cite this version:Yi Ding, Daniel Durox, Nasser Darabiha, Thierry Schuller. Chemiluminescence based operating point control of domestic gas boilers with variable natural gas composition. Applied Thermal Engineering, Elsevier, 2019, 149, pp.

Cited by 18 publications

References 21 publications

Optical Analysis of Blast Furnace Gas Combustion in a Laboratory Premixed Burner

Optical Analysis of Blast Furnace Gas Combustion in a Laboratory Premixed Burner

Application of Non-Thermal Plasma for NOx Reduction in the Flue Gases

Excited Species as Heat Release Rate Markers in Laminar Premixed Ammonia–Hydrogen–Air Flames

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