The effect of hydrogen on the performance and emissions of an SI engine having a high compression ratio fuelled by compressed natural gas

Tangöz, Selim; Kahraman, Nafiz; Akansu, Selahaddin Orhan

doi:10.1016/j.ijhydene.2017.04.076

Cited by 59 publications

(10 citation statements)

References 22 publications

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“…Одним из наиболее быстрореализуемых способов решения данной проблемы является использование композитных топлив. В последнее два десятилетия ученые и инженеры ведущих стран мира уделяют большое внимание новому топливу hythane -смеси природного газа с водородом [1,2]. В США, Китае, Индии и Норвегии действуют программы государственной поддержки потребителей hythane [3,4].…”

Section: введение и постановка задачиunclassified

О Связи Ширины Зоны Турбулентного Горения С Составом Топлива, Давлением, Скоростью Распространения И Электропроводностью Пламени

Шайкин¹,

Галиев²

2020

Журнал Технической Физики

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The results of an experimental study of the relationship between the width turbulent combustion zone (TCZ) and composition of the composite fuel (hythane), the maximum pressure in combustion chamber of variable volume, the propagation velocity and electrical conductivity of the turbulent flame are presented. It was revealed that the width TCZ has a characteristic dependence on the composition of hythane. It was experimentally found that, despite a change coefficient of excess air, hydrogen concentration in the fuel, turbulence intensity and type of fuel (hythane and gasoline), the dependences of width TCZ on the turbulent flame propagation velocity and electrical conductivity of the flame, as well as the dependence maximum pressure on width, remain unchanged TCZ. The results of the work can be used in the design and development of energy-efficient and low-emission combustion chambers.

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Section: введение и постановка задачиunclassified

О Связи Ширины Зоны Турбулентного Горения С Составом Топлива, Давлением, Скоростью Распространения И Электропроводностью Пламени

Шайкин¹,

Галиев²

2020

Журнал Технической Физики

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“…However, the combustion efficiency of CH 4 is low, resulting in a narrow range of flammability, slow combustion rate, and high ignition temperature. 8 These factors render the practical application of CH 4 in vehicles difficult. The disadvantages of CH 4 as a fuel can be overcome by adding hydrogen to form hythane, which has a high flame speed and a short quenching distance.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Moreover, since CH 4 has the smallest C/H ratio, it releases the smallest amount of CO 2 per unit of heat. , Thus, CH 4 is considered a promising clean fuel. However, the combustion efficiency of CH 4 is low, resulting in a narrow range of flammability, slow combustion rate, and high ignition temperature . These factors render the practical application of CH 4 in vehicles difficult.…”

Section: Introductionmentioning

confidence: 99%

Highly Selective and Efficient Reduction of CO₂ to Methane by Activated Alkaline Earth Metal Hydrides without a Catalyst

Zhao

Wei

Cai

et al. 2019

ACS Sustainable Chem. Eng.

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Achieving highly selective and efficient reduction of carbon dioxide into methane will significantly affect the resolution of two of the current crucial issues facing humanity, namely environmental problems due to excess CO 2 and the increasing demand for clean energy. In this paper, the thermochemical reduction of carbon dioxide into methane by the activated alkaline-earth metal hydrides was reported. The results of the correlational experiments show that the reduction of carbon dioxide by the activated nanosized alkaline-earth metal hydrides is highly selective and efficient in the absence of a catalyst under moderate conditions. Only a hydrocarbon species, namely methane, is produced, and the methane yield can reach 88% for the reactions between CaH 2 and carbon dioxide. The mole percentage and yield of CH 4 in the gas-state products depend largely on the type of alkaline-earth metal hydride, reaction temperature, and reaction time.

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“…An exception could be observed under high load conditions. Effects of the compression ratio on SI engines fueled with HCNG have also been investigated in some studies. ,,,− Concerning the CR in dual-fuel CI engines, a few studies have been found, in which the engines are fueled with methane, ,, hydrogen, , and biogas. − However, as can be seen from the literature studies, no study has been found in automotive common-rail direct injection (CRDI) diesel engines fueled with HCNG at different compression ratios (CRs). Nevertheless, some studies using other gas fuels than HCNG were conducted in CRDI engines. − This study, therefore, focuses on combustion and performance characteristics in a CRDI engine fueled with methane and hydrogen enriched methane under different compression ratios.…”

Section: Introductionmentioning

confidence: 99%

Experimental Evaluation of Performance and Combustion Characteristics in a Hydrogen–Methane Port Fueled Diesel Engine at Different Compression Ratios

2019

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This paper investigates the performance and combustion characteristics of a common-rail diesel engine fueled with methane and hydrogen enrichment of methane under different loads (2.15, 4.3, 6.45, and 8.6 bar) and compression ratios (CRs) (18.25, 16.9, and 15.8). Traditional diesel fuel is used as the pilot fuel and is injected twice as pre- and main injections. Results of the usage of gaseous fuels are compared with each other and the single diesel mode. Accordingly, brake thermal efficiency (BTE) and brake specific energy consumption (BSEC) are highly deteriorated at low loads, but they improve with load. Hydrogen substitution results in slightly higher BTE and lower BSEC. The average exhaust temperature with gaseous fuels is enhanced compared to that with diesel. Peak cylinder pressures of dual-fuel operations are higher, and an earlier heat release is observed; moreover, combustion noise of dual-fuel operations is further enhanced under a high CR–high load condition. Finally, combustion durations substantially change with loads and CRs.

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The effect of hydrogen on the performance and emissions of an SI engine having a high compression ratio fuelled by compressed natural gas

Cited by 59 publications

References 22 publications

О Связи Ширины Зоны Турбулентного Горения С Составом Топлива, Давлением, Скоростью Распространения И Электропроводностью Пламени

О Связи Ширины Зоны Турбулентного Горения С Составом Топлива, Давлением, Скоростью Распространения И Электропроводностью Пламени

Highly Selective and Efficient Reduction of CO₂ to Methane by Activated Alkaline Earth Metal Hydrides without a Catalyst

Experimental Evaluation of Performance and Combustion Characteristics in a Hydrogen–Methane Port Fueled Diesel Engine at Different Compression Ratios

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The effect of hydrogen on the performance and emissions of an SI engine having a high compression ratio fuelled by compressed natural gas

Cited by 59 publications

References 22 publications

О Связи Ширины Зоны Турбулентного Горения С Составом Топлива, Давлением, Скоростью Распространения И Электропроводностью Пламени

О Связи Ширины Зоны Турбулентного Горения С Составом Топлива, Давлением, Скоростью Распространения И Электропроводностью Пламени

Highly Selective and Efficient Reduction of CO2 to Methane by Activated Alkaline Earth Metal Hydrides without a Catalyst

Experimental Evaluation of Performance and Combustion Characteristics in a Hydrogen–Methane Port Fueled Diesel Engine at Different Compression Ratios

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Highly Selective and Efficient Reduction of CO₂ to Methane by Activated Alkaline Earth Metal Hydrides without a Catalyst