Effects of piston geometry and injection strategy on the capacity improvement of waste heat recovery from RCCI engines utilizing DOE method

Nazemian, Mehrdad; Neshat, Elaheh; Saray, Rahim Khoshbakhti

doi:10.1016/j.applthermaleng.2019.02.055

Cited by 14 publications

(2 citation statements)

References 44 publications

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“…Ansari et al 23 have used a full factorial DOE test with four input variables, and they showed that the cetane number is the most significant factor that effects HC and CO emissions. Nazemian et al 24 have investigated the effects of piston geometry to achieve higher output power of RCCI engine by using DOE method. It was expressed that the bowl depth has negative effects on the second law efficiency for both of injection strategies.…”

Section: Introductionmentioning

confidence: 99%

Statistical analysis on the effect of premixed ratio, EGR, and diesel fuel injection parameters on the performance and emissions of a NG/Diesel RCCI engine using a DOE method

Poorghasemi

Saray

Ansari

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part D:

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In reactivity-controlled compression ignition (RCCI) engines, the ignition and combustion of premixed low reactive fuel (LRF) such as natural gas (NG) is controlled by the injection of high reactive fuel (HRF) such as diesel fuel during the compression stroke. In this study, the effects of six different input parameters on the performance and emissions of the natural gas/diesel fueled RCCI engine are studied using fractional factorial design (FFD) method, which is one of the design of experiment (DOE) methods. In this method, the effects of the interactions of input parameters, referred to as “factors,” on the outputs, referred to as “responses,” are investigated. The factors include premixed ratio (PR), start of first injection (SOI1), spray angle (SA), exhaust gas recirculation (EGR), start of second injection (SOI2), and mass fraction of first injection. Sixteen runs were conducted to evaluate the effects of the interaction between input factors on performance and emissions of a RCCI engine using a validated computational fluid dynamics (CFD) model. DOE results indicate that in order to increase gross indicated efficiency (GIE), higher premixed ratio, 85%, with wider spray angle, 150°, is an effective way. Meanwhile, carbon monoxide (CO) and unburned hydrocarbons (UHC) emissions as well as ringing intensity (RI) are decreased at this condition. To reduce NOx emissions, it is beneficial to raise premixed ratio from 55% to 85% or to use 40% EGR, independently.

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Section: Introductionmentioning

confidence: 99%

Statistical analysis on the effect of premixed ratio, EGR, and diesel fuel injection parameters on the performance and emissions of a NG/Diesel RCCI engine using a DOE method

Poorghasemi

Saray

Ansari

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part D:

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“…8 In addition to this, certain challenges such as controlling combustion phasing, combustion duration, and rate of heat release are also involved in these types. 9 The RCCI combustion method is applied to exceed those challenges. 10 The combustion phasing of this method is controlled by using two various fuels with different characteristics (One of greater reactivity and the other less reactive).…”

mentioning

confidence: 99%

Bald eagle search optimization on dual fueled reactivity controlled combustion ignition based engine characteristics by altering low reactive fuels

Karthik¹,

Saravanakumar

Palanivel³

2021

Env Prog and Sustain Energy

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In conventional diesel engines, the reactivity controlled combustion ignition (RCCI) systems find to be offer better emission and engine performances. The main aim of this work is to study and enhance the emission, combustion, and performance characteristics of the RCCI based diesel engine. In the present work, we compare and optimize the characteristics of the diesel engines when using methane added hydrogen and methanol fuels as low reactive fuels (LRF). The diesel and dimethyl ether added biodiesel (spirulina microalgae) are used as high reactivity fuels (HRF) with six different proportion rates. In this, initially, the experimental results are investigated by using methanol as LRF with HRF fuel, and better blend proportion is optimized by using bald eagle search optimization (BESO) performed in the Matlab platform. Then, the methane content added hydrogen is used as LRF with the optimized HRF fuel combinations. Finally, from both cases, the optimized experimental characteristics are predicted with the help of the Elman recurrent neural network based BESO. In which, the hydrogen gas contributed RCCI engine provide supreme engine characteristics such as 217.6 g/kWh of specific fuel consumption, 38.7% of brake thermal efficiency, 84.45 bar of cylinder pressure, and the CO 2 and NOx emissions are 539.2 g/kWh, and 1020 ppm. The result reveals that the proposed predicted results are superiorly validated the experimental outcomes with minimal errors.

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Quantitative Methods and Experimental Research

2020

Engineering Research

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Effects of piston geometry and injection strategy on the capacity improvement of waste heat recovery from RCCI engines utilizing DOE method

Cited by 14 publications

References 44 publications

Statistical analysis on the effect of premixed ratio, EGR, and diesel fuel injection parameters on the performance and emissions of a NG/Diesel RCCI engine using a DOE method

Statistical analysis on the effect of premixed ratio, EGR, and diesel fuel injection parameters on the performance and emissions of a NG/Diesel RCCI engine using a DOE method

Bald eagle search optimization on dual fueled reactivity controlled combustion ignition based engine characteristics by altering low reactive fuels

Quantitative Methods and Experimental Research

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