Optimisation of injection timing and compression ratio of a raw biogas powered dual fuel diesel engine

Bora, Bhaskor Jyoti; Saha, Ujjwal K.

doi:10.1016/j.applthermaleng.2015.08.111

Cited by 115 publications

(27 citation statements)

References 30 publications

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“…Having made the necessary changes to the engine power system, natural and biogas may be used as a renewable energy source in internal combustion engines [20][21][22][23]. Supplying biogas reduces the thermal efficiency of both spark ignition (SI) and compression ignition (CI) engines.…”

Section: Introductionmentioning

confidence: 99%

Comparative Study on the Energetic and Ecologic Parameters of Dual Fuels (Diesel–NG and HVO–Biogas) and Conventional Diesel Fuel in a CI Engine

2020

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The Article presents the results of the experimental research and numerical analysis of a compression ignition (CI) engine adapted for running on dual fuels of different composition (diesel and natural gas, diesel and biogas, biodiesel and natural gas, and biodiesel and biogas). The main goal was to find out the impact of different dual fuels on energy performance and emissions depending on the start of injection (SOI) of diesel and the crank angle degree (CAD). Pure conventional diesel fuel and second generation hydrotreated vegetable oil (HVO) (Neste) was used in the research. Natural gas contained 97 vol. % of methane. Biogas (biomethane) was simulated using a methane and carbon dioxide blend consisting of 60 vol. % of methane and 40 vol. % of carbon dioxide. Dual (liquid and gaseous) fuels were used in the tests, with the energy share of liquid fuels accounting for 40% and gas for 60%. The research results have shown that having replaced conventional diesel fuel with dual fuel, engine’s BTE declined by 11.9–16.5%. The use of methane in the dual fuel blend reduced CO2 volumetric fraction in the exhaust gases by 17–20%, while biomethane increased CO2 volumetric fraction by 10–14%. Dual fuel significantly increased CO and HC emissions, but NOx volumetric fraction decreased by 67–82% and smoke by 23–39%. The numerical analysis of the combustion process revealed changes in the ROHR (Rate of Heat Release) that affected engine efficiency and exhaust emissions was done by AVL (Anstalt für Verbrennungskraftmaschinen List) BOOST program.

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Section: Introductionmentioning

confidence: 99%

Comparative Study on the Energetic and Ecologic Parameters of Dual Fuels (Diesel–NG and HVO–Biogas) and Conventional Diesel Fuel in a CI Engine

2020

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“…Fig. 2a shows the variation of BTHE with BP for different compression ratios (14,16,18) Fig. 2c) exhibited higher brake thermal efficiency (28.86%) at full load condition while at standard injection timing (23 0 BTDC) is 28.65%.…”

Section: Results and Discussion A Performance Characteristicsmentioning

confidence: 99%

“…Some of the additives like alcoholic additives (solketal and ethanol) and antioxidant additives such as butylated hydroxyanisole (BHA), butylated hydroxytoluene (BHT), tert-butylhydroquinone (TBHQ) and 2-ethylhexyl nitrate (EHN) [5,8,9] are used for reduction of emissions. In present study, B20 blend of mango seed oil methyl ester is used to investigate the effect of compression ratio and injection timing on performance, combustion and emission characteristics of a four stroke variable compression ratio (VCR) direct injection diesel engine for different compression ratios (CR) (14,16,18) and injection timings (IT) (21°, 23°, 25° before top dead centre (BTDC)).…”

Section: Introductionmentioning

confidence: 99%

“…Various modifications in engines such as exhaust gas recirculation (EGR), diesel oxidation catalyst (DOC), elective catalytic reduction (SCR) and diesel particulate filter (DPF) system have developed to minimize the pollutants. By varying various engine parameters like fuel injection timing [18,24], injection pressure, [6] compression ratio(VCR), [13][14][15][16][17][18][19][20][21] etc. and application of several techniques such as turbo charger, preheating, low heat rejection (LHR), and homogeneous charge compression ignition (HCCI) concept, etc [4,10,11], the performance, combustion, and emission characteristics of engines may be improved.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Injection Timing and Compression Ratio on Performance, Combustion and Emission Characteristics of a Variable Compression Ratio Engine Fueled with Mango Seed Methyl Ester

Babu¹

2018

IJRASET

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In this study, the effect of injection timing and compression ratio on performance, combustion and emission characteristics of a 4-stroke variable compression ratio (VCR) direct injection diesel engine is investigated for different compression ratios (CR) (14,16,18) and injection timings (IT) (21°, 23°, 25° before top dead centre (BTDC)) for mango seed oil methyl ester (MSME) biodiesel blend B20. The brake thermal efficiency (BTHE) is higher (28.86 %) and brake specific fuel consumption (BSFC) is lower (0.3 kg/kWh) at CR18 and IT 21° BTDC. Exhaust gas temperature (EGT) increases with brake power (BP) and showing lower value at higher CR and also at lower IT. The peak cylinder pressure attains at higher CR and advanced injection timing (25° BTDC). Net heat release rate is increasing with decreasing CR. At full load conditions, emissions of carbon monoxide (CO) ,carbon dioxide (CO 2 ) and hydro carbons (HC) are lower at lower IT and higher CR whereas nitrogen oxides (NO x ) is increasing with CR at all injection timings. The overall good performance and emission results show for CR18 and IT 21° BTDC.

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“…At high loads, the cylinder gas temperature is high which leads to better evaporation of the fuel. This reduces the ignition delay period [30,31]. The combustion is advanced at high load conditions due to faster vaporisation of fuel and high in-cylinder temperatures.…”

Section: Varying the Compression Ratiomentioning

confidence: 99%

Current trends on combustion control methods using fuel reactivities

Sankaralingam¹,

Venugopal²

2016

Int. J. Automot. Mech. Eng.

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Compression ignition (CI) engines are used in heavy duty engine applications due to their high torque capability and thermal efficiency. However, high NOx and smoke emissions are the challenges in using CI engines. Homogeneous charge compression ignition (HCCI) is one of the best methods to reduce NOx and smoke emissions. However, controlling the combustion for an entire range of operation in HCCI mode is a challenging task. Different methods like fast thermal management (FTM), exhaust gas recirculation (EGR), turbo charging and reactivity controlled compression ignition (RCCI) are reviewed and discussed in this article. RCCI is similar to HCCI, which uses reactivities of two different fuels to control combustion. The combustion objectives of HCCI such as less NOx and soot emission can also be obtained through this method. Combustion control based on reactivities of various fuels (RCCI) is discussed significantly. Fuels that have different reactivities can help to control the combustion phasing and thereby reducing the emission. Two different fuels can be injected together into the manifold or one fuel can be injected in the port and other in the combustion chamber directly for reactivity based combustion control. The technological development in different combustion control methods is reviewed and discussed in this article which is a useful knowledge base for further research investigations. When compared to other combustion control methods, RCCI is found to be advantageous in all perspectives such as cost, flexibility in control, simplicity and wide range of operation.

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Optimisation of injection timing and compression ratio of a raw biogas powered dual fuel diesel engine

Cited by 115 publications

References 30 publications

Comparative Study on the Energetic and Ecologic Parameters of Dual Fuels (Diesel–NG and HVO–Biogas) and Conventional Diesel Fuel in a CI Engine

Comparative Study on the Energetic and Ecologic Parameters of Dual Fuels (Diesel–NG and HVO–Biogas) and Conventional Diesel Fuel in a CI Engine

Effect of Injection Timing and Compression Ratio on Performance, Combustion and Emission Characteristics of a Variable Compression Ratio Engine Fueled with Mango Seed Methyl Ester

Current trends on combustion control methods using fuel reactivities

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