Experimental investigation of a radiant porous burner performance with simulated natural gas, biogas and synthesis gas fuel blends

Keramiotis, Ch.; Katoufa, M.; Vourliotakis, George; Hatziapostolou, A.; Founti, M.

doi:10.1016/j.fuel.2015.06.041

Cited by 57 publications

(14 citation statements)

References 40 publications

(38 reference statements)

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“…An increase in thermal power of the burner also plays a positive role in increasing thermal efficiency. As power increases, more fuel enters combustion chamber and in fact, the amount of heat release per unit volume increases, which can lead to an increase in flame temperature 15,38 and this fact causes thermal efficiency to increase. Figure 5 shows the amount of emission of NOx versus thermal power at different equivalence ratios.…”

Section: Methodsmentioning

confidence: 99%

Experimental investigation of premixed combustion and thermal efficiency in a porous heating burner

Omidi

Emami

2020

Int J Energy Res

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Summary In the present research, thermal efficiency and the amount of pollutant emissions of a metallic porous burner with a heat exchanger were investigated experimentally. A very important issue about these burners is the stability of flame on the surface of the porous medium. In the present research, through creating a surface flame in the porous medium, the performance of the burner was observed. In this article, by changing the factors like thermal power and equivalence ratio, thermal efficiency and the amount of pollutants were studied. Results showed that the best performance of the burner occurred when the equivalence ratio was 0.8. The maximum thermal efficiency of 39.43% occurred at an equivalence ratio of 0.8 and thermal power of 100 kW. As thermal power increased, the amount of emitted nitric oxide (NOx) increased. Approximately at all measured conditions, the amount of emitted NOx was less than 15 ppm. Also, the amount of emission carbon monoxide (CO) at an equivalence ratio of 0.8 and thermal power of 100 kW was the lowest. In this research, results of the porous burner were compared to the free flame burner and the results revealed that in the best condition, thermal efficiency was improved up to 5.8%. Accordingly, the amount of emitted NOx was reduced strongly but the amount of CO of the porous burner was much more than the open flame burner.

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Section: Methodsmentioning

confidence: 99%

Experimental investigation of premixed combustion and thermal efficiency in a porous heating burner

Omidi

Emami

2020

Int J Energy Res

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“…One of these methods is the use of efficient burners. In this regard, porous burner has been proposed by many researchers 1‐11 . The porous burner has several advantages compared with conventional burners, such as increasing flame stability, reducing pollutant emissions, uniform heat distribution, and preheating of unburned mixture 12 .…”

Section: Introductionmentioning

confidence: 99%

Experimental analysis of the effects of porous wall on flame stability and temperature distribution in a premixed natural gas/air combustion

2020

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In the present analysis, the flame stabilization and temperature distribution within a premixed burner contain porous wall are studied experimentally. The effects of inner diameter, length, and pore density of the porous wall, thermal load, equivalence ratio, and the inlet velocity of the fuel-air mixture on these are studied.The fuel used in this study is natural gas and the porous wall is SiC (silicon carbide) ceramic foam. The experimental results clearly indicate that the axial temperature along the porous wall increases when the inner diameter of the porous wall decreases and its length increases. The porous wall temperature with an inner diameter of 40 mm, length of 66 mm, and pore density of 30 PPI (pores per inch) has the highest temperature among the examined states. The results of studying the effect of the porous wall on flame stability show that the flame stability limit has a direct relationship with the length and pore density of porous wall and an inverse relationship with the inner diameter of the porous wall. Also, it is found that the porous wall has the highest temperature causes the maximum flame stability limit.

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“…Also, they observed that NO x concentration was less than 3 ppm for all porous media. Keramiotis et al [26] experimentally studied the effect CH 4 , CO, H 2 , and CO 2 blends on radiative efficiency and pollutant formation in a two-layer porous burner. Their results revealed that by adding CO 2 to the fuel blends, CO concentration increased and NO x concentration decreased at the exit of the combustion chamber.…”

Section: Introductionmentioning

confidence: 99%

The influence of porous wall on flame length and pollutant emissions in a premixed burner: an experimental study

Mollamahdi

Hashemi

Alsulaiei

2019

J Braz. Soc. Mech. Sci. Eng.

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In this experimental research, a porous wall is used to stabilize a premixed flame. The effect of the porous wall on the flame length, CO, and NO x emissions for natural gas and air combustion is studied at a fixed power burner. A cylindrical flame holder with 154 mm length, 90 mm inner diameter, and 160 mm outer diameter is used as a combustion chamber. The SiC porous walls have outer diameter of 90 mm, inner diameter of 40, 50, and 60 mm, pore density of 10, and 30 PPI, and length of 22, 44, and 66 mm. A Testo 350 XL gas analyzer is used to measure emission pollutants. It is observed that the flame length increases with an increase in the pore density and the length of porous wall and a decrease in the inner diameter of porous wall. An appropriate correlation is proposed to estimate the flame length at constant pore density and power burner. Also, the results revealed that NO x concentration increases with increasing inner diameter and length of porous wall and decreases with increasing pore density of porous wall. CO results show that CO concentration only depends on the equivalence ratio and the physical characteristics of the porous wall does not affect it. Keywords Premixed burner • Porous wall • Flame length • NO x • CO List of symbols A Area (m 2) d Inner diameter (mm) H Length (mm) LHV Lower heat value (kj/m 3) PPI Pore per inch P Burner power (kW) m Mass flow rate (kg/s) T Temperature (°C) W Uncertainty of the dependent variable w Uncertainty of the independent variable Greek symbols ρ Density (kg/m 3) ϕ Equivalence ratio

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Experimental investigation of a radiant porous burner performance with simulated natural gas, biogas and synthesis gas fuel blends

Cited by 57 publications

References 40 publications

Experimental investigation of premixed combustion and thermal efficiency in a porous heating burner

Experimental investigation of premixed combustion and thermal efficiency in a porous heating burner

Experimental analysis of the effects of porous wall on flame stability and temperature distribution in a premixed natural gas/air combustion

The influence of porous wall on flame length and pollutant emissions in a premixed burner: an experimental study

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