Analysis of the performance of a low-power atmospheric burner for gas appliances for households and their impact on the emission and stability of the burner

Milivojevic, M Aleksandar; Gojak, Milan; Stamenic, S Mirjana; Adzic, M Miroljub

doi:10.2298/tsci200717302m

Cited by 3 publications

(1 citation statement)

References 12 publications

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“…In paper [23] results of theoretical numerical research dealing with CO and NOx emission performed in the process of optimization of the performance of low-power atmospheric burners are presented. In paper [24] flame geometry and location was investigated using CH* chemiluminescence imaging technique.…”

Section: Research Reviewmentioning

confidence: 99%

Effects of Flue Gas Recirculation on NOx Emissions from Gas-Fired Utility Boilers

Tanasić¹,

Stamenić

Tanasić³

2021

Current Problems in Experimental and Computational Engineering

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Gas-fired utility boilers are most common in the district heating system in the city of Belgrade. Thus, they are an important stationary source of NOx emissions, which are particularly harmful for people and environment. In this paper the effectiveness of the flue gas recirculation (FGR) system that is applied to reduce NOx emissions of the utility hot water and steam boilers in district heating plant is experimentally investigated. Two types of systems are analysed; the first with the application of flue gas recirculation fan at hot water boilers; and the second without the application of flue gas recirculation fan at steam boilers. In both cases the rate of flue gas recirculation was 10%. The results of measurements showed that applied FGR systems efficiently reduced NOx emissions from utility boilers by 20 to 50% and below the reference values defined by legislative regulations. Emissions are higher at steam boiler which is expected because of the higher flue gas temperature at boiler furnace. Since the measured values for hot water boilers are close to the reference values, it was concluded that there is a potential for further improvements by increasing the flue gas recirculation rate.

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Section: Research Reviewmentioning

confidence: 99%

Effects of Flue Gas Recirculation on NOx Emissions from Gas-Fired Utility Boilers

Tanasić¹,

Stamenić

Tanasić³

2021

Current Problems in Experimental and Computational Engineering

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Experiment and simulation studies on thermal performance of a novel water-cooling premixed wall-hung gas boiler

et al. 2023

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A wall-hung gas boiler was innovatively proposed and designed in this paper. Water-cooling premixed combustion and enhanced condensation heat exchange technology were adopted in the boiler. The extruded aluminum plate-fin structure was adopted in the burner and condensing heat exchanger. Experiment and numerical simulation studies were conducted on the flow, combustion, and heat exchange characteristics of the boiler. The effect of the fin structure, excess air coefficient, heat load, and water-cooling temperature on the thermal performance of the boiler was analyzed. The results showed that reliable ignition, stable combustion, uniform flame distribution, and low pollutant emissions can be achieved in the wall-hung gas boiler. Affected by burning intensity and internal flue gas recirculation, when the burner plate-fin gap was 1.63 mm, the flame was the shortest and the NOx emissions were the lowest. Under this fin condition, ultra-high efficiency and ultra-low emissions can be achieved in the boiler with a low excess air coefficient. When the excess air coefficient was 1.3, the NOx emissions were less than 30 mg/m3 at the heat load of 4-14 kW, and the thermal efficiency can reach up to 102.8% at the rated load of 14 kW. Within the scope of the experiment, the NOx emissions changed little with the water-cooling temperature. At the temperature of 333 K, there was still a great NOx emission reduction effect.

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Numerical Investigation of the Effect of Injector Diameter, Injection Velocity and Air Inlet Hole Numbers on Air-Fuel Mixing In Atmospheric Burner

ÖZBEKTAŞ

Sungur

Topaloğlu

2021

Konya Journal of Engineering Sciences

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ÖZ: Dünya enerji ihtiyacının büyük bir kısmı fosil kökenli kaynaklardan karşılanmaktadır. Ancak fosil enerji kaynaklarının giderek azalması, araştırmacıları mevcut kaynaklara alternatif olabilecek yeni yakıt arayışlarına ve eldeki kaynakları daha verimli kullanmaya yöneltmiştir. Ayrıca enerji üretilirken genelde bir yakma sisteminden faydalanılır ve yakma sisteminin verimi yanma kalitesiyle yakından ilgilidir. Gaz yakıtın durgun hava içine enjekte edildiği ve gereken yakma havasını emmek suretiyle yakma havasını yakıtın kendisinin temin ettiği yakıcılar atmosferik yakıcılar olarak bilinir ve bu yakıcılarda hava-yakıt karışma oranları yanma kalitesini belirlemede önemli bir paya sahiptir. Bu çalışmada örnek bir atmosferik brülörde enjektör çapının ve enjeksiyon hızının hava-yakıt karışmasına etkisi nümerik olarak incelenmiştir. Ayrıca çalışma kapsamında iki, dört, sekiz ve sonsuz hava giriş delikli tasarımların brülördeki hava/yakıt karışmasına etkisi incelenmiştir. Hesaplamalar üç boyutlu olarak gerçekleştirilmiştir. Türbülansın modellenmesinde Standard k-ε modeli kullanılmıştır. Sonuçlar incelendiğinde, enjeksiyon hızının artması sürüklenen hava hızını arttırıcı yönde etki göstermiş, artan enjeksiyon hızıyla birlikte oluşan girdapların da boyutlarının büyüdüğü görülmüştür. Ayrıca hava giriş delik sayısının artmasıyla birlikte havanın içeri daha fazla nüfuz ettiği ve buna bağlı olarak λ değerinin arttığı görülmüştür. Ancak bu artışın önemli seviyelerde olmadığı belirlenmiştir.

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Analysis of the performance of a low-power atmospheric burner for gas appliances for households and their impact on the emission and stability of the burner

Cited by 3 publications

References 12 publications

Effects of Flue Gas Recirculation on NOx Emissions from Gas-Fired Utility Boilers

Effects of Flue Gas Recirculation on NOx Emissions from Gas-Fired Utility Boilers

Experiment and simulation studies on thermal performance of a novel water-cooling premixed wall-hung gas boiler

Numerical Investigation of the Effect of Injector Diameter, Injection Velocity and Air Inlet Hole Numbers on Air-Fuel Mixing In Atmospheric Burner

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