Effects of hydrogen and methane addition on combustion characteristics, emissions, and performance of a CI engine

Karagöz, Yasin; Güler, İlker; Sandalcı, Tarkan; Yüksek, Levent; Dalkılıç, Ahmet Selim; Wongwises, Somchai

doi:10.1016/j.ijhydene.2015.11.112

Cited by 53 publications

(11 citation statements)

References 37 publications

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“…They conducted an experimental study in a gas turbine combustor and applied OH PLIF and POD to determine reasons for the frequency mode shift phenomenon (11) . Moreover, many researchers have studied the characteristics of combustion using experimental (12)(13)(14)(15)(16)(17)(18)(19)(20) , analytic (21,22) and computational (23)(24)(25) approaches.…”

Section: Past Research On H 2 /Ch 4 Combustion In Gas Turbinementioning

confidence: 99%

High-frequency transition characteristics of synthetic natural gas combustion in gas turbine

et al. 2019

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In this study, the combustion instability and emission characteristics of flames of different H2/CH4 compositions were investigated in a partially premixed model gas turbine combustor. A mode shift in the frequency of instability occurred under varying experimental conditions from the first to the seventh mode of longitudinal frequency in the combustor, and a parametric study was conducted to determine the reasons for this shift by using the length of the combustor, a factor that determines the mode frequency of longitudinal instability, as the main parameter. Furthermore, heat load and fuel composition (H2 ratio) were considered as parameters to compare the phenomenon under different conditions. The GRI-3.0 CANTERA code, OH chemiluminescence and the Abel inversion process were applied to analyse the frequency mode shift. NOx emissions, which occurred through the thermal NOx mechanism, increased with increasing heat load and H2 ratio. The instability frequency shifted from the first to the seventh mode as the H2 ratio increased in the H2/CH4 mixture. However, 100% H2 as fuel did not cause combustion instability because it has a higher burning velocity and extinction stretch rate than CH4. Furthermore, the laminar flame speed influenced the frequency mode shift. These phenomena were confirmed by the flame shapes. The Abel inversion process was applied to obtain the cross section of the flames from averaged OH chemiluminescence images. Stable and unstable flames were identified from the radial profile of OH concentration. The combustor length was found to not influence frequency mode shift, whereas the H2 ratio significantly influenced it as well as the flame shape. The results of this experimental study can help in the reliable operation of gas turbine systems in SNG plants.

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Section: Past Research On H 2 /Ch 4 Combustion In Gas Turbinementioning

confidence: 99%

High-frequency transition characteristics of synthetic natural gas combustion in gas turbine

et al. 2019

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“…The effect of the LPG + H2 gas mixture addition (0%, 15%, 30% and 45%) on brake thermal efficiency, CO, THC, NOx and smoke emissions in different energy contents at 1200 rpm constant engine speed and 100% brake engine load investigated experimentally on the work [30][31][32]. The gas fuel mixture was sent through the suction manifold through the LPG-CNG injector at the suction stroke.…”

Section: Resultsmentioning

confidence: 99%

Effect of Different Levels of Hydrogen + LPG Addition on Emissions and Performance of a Compression Ignition Engine

Köten¹

2019

Journal of Thermal Engineering

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Compelling emission regulations and diesel engines damage on environment have led researchers to work on alternative fuels such as LPG and hydrogen in recent years. Diesel engine costs are also increasing, especially on the increased costs of after-treatment equipment used in diesel engines. It is also known that diesel engines release NOx and smoke emissions, which are highly harmful to the environment and to the living health. The effect of the emissions of LPG + H2 (0%, 15%, 30% and 45%) with different energy contents at full load and same torque (70 Nm) at constant engine speed of 1200 rpm is investigated on CO, THC, NOx and Smoke emissions. From the results obtained, there was a slight increase in brake thermal efficiency, CO and THC emissions. However, significant improvement in NOx and smoke emissions has been achieved. The results show that using LPG + H2 in diesel engines, older technology and lower cost after-treatment equipment can be used, and that NOx and smoke emissions of diesel engines can be reduced significantly. Also, using small amount of hydrogen (20% of total gas mixture) and LPG, an important improvement can be achieved, and the harmful effects of diesel engines can be suppressed thanks to unique properties of hydrogen fuel.

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“…Hidrojen, karbon esaslı olmayan, oksijen ile yanması sonucunda yanma ürünü olarak su oluşturan ve çevre dostu olan zehirsiz, kokusuz, yenilenebilir ve geri dönüştürülebilir alternatif bir yakıttır [3,18,19]. Hidrojenin yanması sonucunda hidrokarbon ve karbon monoksit gibi zehirli ürünler oluşmadığından dolayı hava kalitesine olumlu katkıda bulunmaktadır [20][21][22] [32,39,40], hidrojen-biyodizel [41][42][43], hidrojen-metan gazı [38,44,45], hidrojen-biyogaz [45][46][47], hidrojen-doğal gaz [48][49][50]…”

Section: Introductionunclassified

“…Hidrojen, yaygın olarak kullanılan benzin, dizel ve doğal gaz gibi geleneksel fosil yakıtlar ile karşılaştırıldığında; daha yüksek alev yayılma hızı, daha düşük tutuşma enerjisi, daha hızlı difüzyon oranı, daha geniş tutuşabilirlik sınırı ve daha kısa alev sönme mesafesi gibi birçok avantaja sahiptir [4,[22][23][24][25][26]. Hidrojen gazının düşük tutuşma enerjisi, geniş tutuşabilirlik aralığı ve yüksek yanma hızı gibi özellikleri İYM'lerde yanma için yetersiz koşullar altında dahi yakılabilmesini sağlar [ [38]. Emme manifolduna hidrojenin sürekli enjeksiyonu en basit yöntemdir.…”

Section: Introductionunclassified

“…Sıkıştırma ile ateşlemeli motorlarda hidrojenin ikincil yakıt olarak kullanılması ile ilgili yapılan çalışmalar incelendiğinde; genel olarak hidrojendizel [32,39,40], hidrojen-biyodizel [41][42][43], hidrojen-metan gazı [38,44,45], hidrojen-biyogaz [45][46][47], hidrojen-doğal gaz [48][49][50] ve hidrojen-LPG [51][52][53] gibi uygulamalara rastlamak mümkündür. Sıkıştırma ile ateşlemeli motorlarda hidrojen-dizel uygulamasının motor performansına ve emisyonlarına etkisi ile ilgili oldukça fazla çalışma yapılmış olup aşağıda özetlenmiştir.…”

Section: Introductionunclassified

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Effect of Hydrogen Addition on Exhaust Emissions in a Compression Ignition Engine

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et al. 2019

Çukurova Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi

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Bu çalışmada, hidrojen miktarının hidrojen-dizel yakıtlı sıkıştırma ile ateşlemeli (CI) motorun üzerindeki etkisi araştırılmıştır. Hidrojen, sürekli olarak bir karıştırma odasına gönderilmiştir. Dizel yakıt, Common Rail yakıt enjeksiyon sistemi ile silindirlere gönderilmiştir. Deneysel çalışmada; dört silindirli, dört zamanlı, su soğutmalı, 1,461-L ve turbo şarjlı CI motoru kullanılmıştır. Egzoz emisyonları, 1750 d/d sabit hızda 40 Nm, 60 Nm ve 80 Nm motor yükleri altında incelenmiştir. Hidrojen debileri; 10 l/d, 20 l/d ve 30 l/d olarak seçilmiş ve H10, H20 ve H30 olarak isimlendirilmiştir. Sonuçlara göre, NO x ve CO 2 emisyonlarında iyileşmeler olurken, HC ve is emisyonları artış meydana gelmiştir. Hidrojen katkısının O 2 emisyonu üzerine etkisinin oldukça düşük olduğu görülmüştür.

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Effects of hydrogen and methane addition on combustion characteristics, emissions, and performance of a CI engine

Cited by 53 publications

References 37 publications

High-frequency transition characteristics of synthetic natural gas combustion in gas turbine

High-frequency transition characteristics of synthetic natural gas combustion in gas turbine

Effect of Different Levels of Hydrogen + LPG Addition on Emissions and Performance of a Compression Ignition Engine

Effect of Hydrogen Addition on Exhaust Emissions in a Compression Ignition Engine

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