Effect of direct water injection temperature on combustion process and thermal efficiency within compression ignition internal combustion Rankine engine

Kang, Zhe; Feng, Shangsi; Yang, Lijun; Wu, Jingtao; Wu, Zhijun

doi:10.1016/j.csite.2021.101592

Cited by 12 publications

(9 citation statements)

References 24 publications

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“…Then, HCCI (Homogeneous Charge Compression Ignition) combustion under oxyfuel combustion mode can be achieved. Several reported studies of diesel oxyfuel combustion [9][10][11] have demonstrated their explorations into HCCI oxyfuel combustion in diesel engines.…”

Section: Figurementioning

confidence: 99%

“…By experimental investigation, diesel oxyfuel combustion has been examined by several report research. Reported by Kang et al [11] for studying diesel oxyfuel Effects of intake temperature on ignition timing [10].…”

Section: Figurementioning

confidence: 99%

“…From the result, it can be seen that water injection can result in a small reduction of compression negative work, a small reduction of expansion work, and an obvious increase of ignition delay and retarded ignition timing. By increasing A diesel test engine modified to operate oxyfuel combustion [11].…”

Section: Figure 11mentioning

confidence: 99%

“…Effects of water injection temperature on IMEP, COV of IMEP, ignition delay and thermal efficiency [11].…”

Section: Figure 14mentioning

confidence: 99%

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Oxyfuel Combustion in IC Engines

Peng¹,

Li²

2023

Renewable Energy - Recent Advances

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This chapter introduces principles, mixing, ignition and combustion and controls processes of oxyfuel combustion which aims to achieve CCS (Carbon Capture and Storage) in IC (Internal Combustion) engines. By replacing air with pure oxygen and using hot and/or cooled EGR as dilutant gas for controlling the combustion process and flame speed, the mixing and combustion process will be explained. Fuel delivery, pre-mixing arrangement between pure oxygen and dilutant gas and their influences on combustion performances will be discussed. HCCI (Homogeneous Charge Compression Ignition), water injection, etc., technologies for enhancing the combustion efficiency will be demonstrated in detail. Finally, the emission characteristics and possible implementation of practical engine operation will be described.

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Section: Figurementioning

confidence: 99%

Section: Figurementioning

confidence: 99%

Section: Figure 11mentioning

confidence: 99%

“…Effects of water injection temperature on IMEP, COV of IMEP, ignition delay and thermal efficiency [11].…”

Section: Figure 14mentioning

confidence: 99%

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Oxyfuel Combustion in IC Engines

Peng¹,

Li²

2023

Renewable Energy - Recent Advances

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“…While the results of simulation of heterogeneous charge compression ignition oxy-fuel combustion coupled with DWI shows higher efficiency potential than HCCI-ICRC and SI-ICRC [20]. Therefore, further experiments was conducted to verify the feasibility of diffusion oxy-fuel combustion can be obtained under the intake oxygen fraction (OF, OF = 2 /( 2 + 2 )) 50% to 65% [21], and the DWI temperature was determined to achieve higher BTE [22].…”

Section: Figure 1 Schematic Diagram Of Icrc Engine System [10]mentioning

confidence: 99%

Effect of Direct Water Injection Pressure on Cycle Performance and Emissions Characteristics within a Compression Ignition Internal Combustion Rankine cycle Engine

Zhe¹,

Kang²,

Yang³

et al. 2022

Preprint

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Internal combustion Rankine cycle (ICRC) with oxyfuel is a novel concept to achieve zero carbon emission in theory due to the carbon dioxide capture system, and nitrogen oxides can be completely eliminated as intake of air is replaced by oxygen. In previous studies, traditional compression ignition engine coupled with ICRC system (CI-ICRC) shows great potential in brake thermal efficiency (BTE), emission characteristics and cycle performance through direct water injection (DWI). Since the CI-ICRC has been proved a feasible way to realize high efficiency and low emissions, a selfdesigned CI-ICRC prototype engines was established, series of experiments have been conducted focusing on the optimization of CI-ICRC engine including oxygen content, DWI temperature, DWI timing, etc. In this study, to further determine optimum DWI strategy, the effect of DWI pressure on cycle performance and emissions characteristics has been investigate. According to experimental results, under 320℃A DWI timing and constant mass of injected water, higher DWI pressure with shorter DWI pulse width reduces the direct impact of vapor on combustion so that shorter ignition delay and less HC emissions are obtained. With the increase of DWI pressure, the cycle performance and BTE of CI-ICRC prototype engine is improved due to the better atomization of water. The optimum BTE achieved within the prototype engine is 46.6%, with coefficient of variation close to 1% under 35MPa DWI pressure. But the NO X and soot emissions slightly increased as elevating DWI pressure. The experimental results can also be utilized in providing reference information for DWI utilization within other novel internal combustion engine concepts.

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