Study of Combustion Characteristics of a Quasi Internal Combustion Rankine Cycle Engine

Yu, Xiao; Wu, Zhijun; Fu, Lezhong; Deng, Jun; Hu, Zongjie; Li, Liguang

doi:10.4271/2013-01-2698

Cited by 22 publications

(28 citation statements)

References 12 publications

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“…This strategy is utilised in this simulation work because of its simple design without considering EGR control. The other one in Figure 3 (b) is that oxygen is fed into a mixing chamber and engine cylinders together with a portion of exhaust gases from EGR system [13][14][23] [24]. In either of these two strategies, high-pressure bottles or liquefied gas tanks are employed as the oxygen supplement resources.…”

Section: Methodsmentioning

confidence: 99%

Numerical study on the effects of intake charge on oxy-fuel combustion in a dual-injection spark ignition engine at economical oxygen-fuel ratios

Pei

Peng

et al. 2021

International Journal of Engine Research

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In order to decrease Carbon Dioxide (CO2) emissions, Oxy-Fuel Combustion (OFC) technology with Carbon Capture and Storage (CCS) is being developed in Internal Combustion Engine (ICE). In this article, a numerical study about the effects of intake charge on OFC was conducted in a dual-injection. Spark Ignition (SI) engine, with Gasoline Direct Injection (GDI), Port Fuel Injection (PFI) and P-G (50% PFI and 50% GDI) three injection strategies. The results show that under OFC with fixed Oxygen Mass Fraction (OMF) and intake temperature, the maximum Brake Mean Effective Pressure (BMEP) is each 5.671, 5.649 and 5.646 bar for GDI, P-G and PFI strategy, which leads to a considerable decrease compared to Conventional Air Combustion (CAC). [Formula: see text], [Formula: see text] and [Formula: see text] of PFI are the lowest among three injection strategies. With intake temperature increases from 298 to 378 K, the reduction of BMEP can be up to 12.68%, 12.92% and 12.75% for GDI, P-G and PFI, respectively. Meantime, there is an increase of about 3% in Brake Specific Fuel Consumption (BSFC) and Brake Specific Oxygen Consumption (BSOC). Increasing OMF can improve the performance of BMEP and BSFC, and the trend is more apparent under GDI strategy. Besides, an increasing tendency can be observed for cylinder pressure and in-cylinder temperature under all injection strategies with the increase of OMF.

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Section: Methodsmentioning

confidence: 99%

Numerical study on the effects of intake charge on oxy-fuel combustion in a dual-injection spark ignition engine at economical oxygen-fuel ratios

Pei

Peng

et al. 2021

International Journal of Engine Research

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“…The constant pressure process can also be extended as the result of the water evaporation at the beginning of the power stroke. 24 Furthermore, water injection strategy has also been adopted as a useful measure to optimise the combustion process for oxy-fuel engines. 25,26 In this section, the effect of water injection strategy to recover engine power is explored in detail.…”

Section: Recovering Power By Utilising Water Injection Strategymentioning

confidence: 99%

A feasibility study of implementation of oxy-fuel combustion on a practical diesel engine at the economical oxygen-fuel ratios by computer simulation

Peng

Ajmal

et al. 2020

Advances in Mechanical Engineering

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To help achieve zero carbon emissions from inland waterway vessels, this implementation of oxy-fuel combustion on a practical diesel engine at the economical oxygen-fuel ratios were systematically studied and analysed in this paper. A 1-D simulation was used to explore the effect of various operating parameters for recovering the engine power when the engine is modified to the oxy-fuel combustion from conventional air combustion. The brake power of oxy-fuel combustion is only 26.7 kW that has a noticeable decline compared with 40 kW of conventional air combustion with fixed consumption of fuel and oxygen. By optimising some valuable parameters, like fuel injection timing, intake charge temperature, intake components, engine compression ratio and water injection strategy, a benefit of 6.8 kW has been acquired in the engine power. Afterwards, a remarkable benefit was obtained with the increase of lambdaO2 from 1.0 to 1.5, finally obtaining the same engine power with the conventional air combustion. Above all, taking advantage of various operating parameters, it is expected to further improve the value of the implement of oxy-fuel combustion on diesel engines at the economical oxygen-fuel ratios.

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“…As the oxidizer within the combustion chamber is pure oxygen, the combustion intensity within the combustion chamber is relatively strong, in order to control and optimize the combustion process, direct water injection (DWI) is implemented to regulate the combustion process. On the other hand, the direct injected water can further absorb combustion heat and evaporate rapidly: the phase transformation of liquid water into high-pressure steam further increases the expansion work during engine operation, and, benefitting from the above factors, the thermal efficiency of ICRC engine can be improved significantly [7,8]. As well as the efficiency enhancement, the ICRC concept also contributes to the decrement of exhaust emissions.…”

Section: Introductionmentioning

confidence: 99%

“…A schematic diagram of the ICRC engine is illustrated in Figure 1. Compare to BEV and FCV, the design and implementation of the ICRC engine is based on conventional ICEs and mature technologies utilized among transportation and power generation industries, so it is reasonable to expect lower realization difficulty and production cost [8]. It is also reasonable to utilize the ICRC engine into HEV, especially in the range extension electric vehicle (REEV), because of much simpler working conditions which further decrease the implementation difficulties of ICRC engine.…”

Section: Introductionmentioning

confidence: 99%

Experimental Research of High-Temperature and High-Pressure Water Jet Characteristics in ICRC Engine Relevant Conditions

et al. 2019

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The internal combustion Rankine cycle (ICRC) concept provides a potential solution for future high thermal efficiency and low emission powertrains, and direct water injection (DWI) proved to be the key parameter for ICRC optimization. This paper was dedicated to investigating the fundamental mechanisms of water spray characteristics under different water injection control parameters. In order to do so, an experimental test system was carefully designed and built based on the Bosch and Schlieren methods: the Bosch method is utilized to measure the effect of injection and ambient pressure on water injection characteristics, and the Schlieren method is utilized to investigate the impact of water injection and ambient temperature on water spray and evaporation processes. The experimental results indicate that both control parameters show important effects on water injection and spray characteristics. The water injection and ambient pressure show significant impacts on steady-state flow quantity and cyclic water injection quantity, and the water injection and ambient pressure affect the evaporation ability of water vapor within the spray which leads to a different variation trend during the initial, developing, and developed water spray stages. The results of this work can be used as fundamental supplements for ICRC, steam assistant technology (SAT), and DWI-related ICEs experimental and numerical researches, and provide extra information to understand the DWI process within engine-relevant conditions.

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Study of Combustion Characteristics of a Quasi Internal Combustion Rankine Cycle Engine

Cited by 22 publications

References 12 publications

Numerical study on the effects of intake charge on oxy-fuel combustion in a dual-injection spark ignition engine at economical oxygen-fuel ratios

Numerical study on the effects of intake charge on oxy-fuel combustion in a dual-injection spark ignition engine at economical oxygen-fuel ratios

A feasibility study of implementation of oxy-fuel combustion on a practical diesel engine at the economical oxygen-fuel ratios by computer simulation

Experimental Research of High-Temperature and High-Pressure Water Jet Characteristics in ICRC Engine Relevant Conditions

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