A numerical investigation of lean operation characteristics of spark ignition gas engine fueled with biogas and added hydrogen under various boost pressures

Park, Jungsoo; Choi, Jungwook

doi:10.1016/j.applthermaleng.2017.01.115

Cited by 12 publications

(6 citation statements)

References 25 publications

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“…Detailed test conditions are shown in Table 2. A numerical analysis is conducted using GT-POWER, which is software designed for engine cycle simulations based on thermodynamics; a more detailed explanation can be found in our previous study [17].…”

Section: Target Engine and Detailed One-dimensional Engine Modelingmentioning

confidence: 99%

“…The combustion process is analyzed using a two-zone model employed in our previous numerical analysis of a gas engine generator fueled with CH 4 −H 2 blends [17]. For every time step in each zone, energy, mass, and momentum conservation equations are solved separately [17,18]. The primary equations used for describing the combustion behavior to indicate mass entrainment in the flame front, burn rate, and flame speed are as follows:…”

Section: Target Engine and Detailed One-dimensional Engine Modelingmentioning

confidence: 99%

“…Figure 1 shows the overall process for the present research. More detailed explanations for DoE and LHS for engine analysis are thoroughly described in our previous work [17,19,23,24].…”

Section: Latin Hypercube Sampling For the Response Surface Modelmentioning

confidence: 99%

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Conceptual Approach on Feasible Hydrogen Contents for Retrofit of CNG to HCNG under Heavy-Duty Spark Ignition Engine at Low-to-Middle Speed Ranges

2020

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Hydrogen-based engines are progressively becoming more important with the increasing utilization of hydrogen and layouts (e.g., onboard reforming systems) in internal combustion engines. To investigate the possibility of HICE (hydrogen fueled internal combustion engine), such as an engine with an onboard reforming system, which is introduced as recent technologies, various operating areas and parameters should be considered to obtain feasible hydrogen contents itself. In this study, a virtual hydrogen-added compressed natural gas (HCNG) model is built from a modified 11-L CNG (Compressed Natural Gas) engine, and a response surface model is derived through a parametric study via the Latin hypercube sampling method. Based on the results, performance and emission trends relative to hydrogen in the HCNG engine system are suggested. The operating conditions are 1000, 1300, and 1500 rpm under full load. For the Latin hypercube sampling method, the dominant variables include spark timing, excess air ratio (i.e., λCH4+H2), and H2 addition. Under target operating conditions of 1000, 1300, and 1500 rpm, the addition of 6–10% hydrogen enables the virtual HCNG engine to reach similar levels of torque and BSFC (brake specific fuel consumption) compared to same lambda condition of λCH4. For the relatively low 1000 rpm speed under conditions similar to those of the base engine, NOx formation is greater than base engine condition, while a similar NOx level can be maintained under the middle speed range (1300 and 1500 rpm) despite hydrogen addition. Upon addition of 6–10% hydrogen under the middle speed operation range, the target engine achieves performance and emission similar to those of the base engine.

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Section: Target Engine and Detailed One-dimensional Engine Modelingmentioning

confidence: 99%

Section: Target Engine and Detailed One-dimensional Engine Modelingmentioning

confidence: 99%

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Conceptual Approach on Feasible Hydrogen Contents for Retrofit of CNG to HCNG under Heavy-Duty Spark Ignition Engine at Low-to-Middle Speed Ranges

2020

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“…In case of biogas, it has a great potential as it can be obtained as waste in various industries where fermentation or decay processes take place [7] (in the food industry e.g., cheese production [8], landfill gas treatment [9], fertilizer production-manure and slurry processing [10]). Clearly, the use of such fuels also has negative consequences, as CO 2 in biogas reduces the calorific value of fuels and changes their combustion properties [11], decreases the maximum in-cylinder pressure [12] and the lower heating value (LHV) of the air-fuel mixture [13]. Also, biogas contains CO, hydrogen sulfide (H 2 S), siloxanes, nitrogen (N 2 ), oxygen (O 2 ) and hydrogen (H 2 ) [14] which could damage an internal combustion (IC) engine, therefore they should be separated by biological desulphurization [15] and membrane separation process [16].…”

Section: Introductionmentioning

confidence: 99%

Impact of Simulated Biogas Compositions (CH4 and CO2) on Vibration, Sound Pressure and Performance of a Spark Ignition Engine

et al. 2021

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Biogas has increasingly been used as an alternative to fossil fuels in the world due to a number of factors, including the availability of raw materials, extensive resources, relatively cheap production and sufficient energy efficiency in internal combustion engines. Tightening environmental and renewable energy requirements create excellent prospects for biogas (BG) as a fuel. A study was conducted on a 1.6-L spark ignition (SI) engine (HR16DE), testing simulated biogas with different methane and carbon dioxide contents (100CH4, 80CH4_20CO2, 60CH4_40CO2, and 50CH4_50CO2) as fuel. The rate of heat release (ROHR) was calculated for each fuel. Vibration acceleration time, sound pressure and spectrum characteristics were also analyzed. The results of the study revealed which vibration of the engine correlates with combustion intensity, which is directly related to the main measure of engine energy efficiency—break thermal efficiency (BTE). Increasing vibrations have a negative correlation with carbon monoxide (CO) and hydrocarbon (HC) emissions, but a positive correlation with nitrogen oxide (NOx) emissions. Sound pressure also relates to the combustion process, but, in contrast to vibration, had a negative correlation with BTE and NOx, and a positive correlation with emissions of incomplete combustion products (CO, HC).

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“…The biogas originated fuels can be characterized by low chemical energy density, slow laminar flame speed, variable and non-uniform gas composition, which can cause incomplete combustion, non-uniform flame front propagation, instability of combustion conditions (oxygen excess ratio), low or variable power output and mediocre efficiency and high cycle-to-cycle variations (Muñoz et al , 2000; Zhang et al , 2016). The knowledge about the enriched biogas/methane and biogas/hydrogen combustion in ICE in terms of variable volume and pressure profile can be found in literature (Qian et al , 2017; Park and Choi, 2017), however, the research concerns only at the methane rich biogas fuels. In this work, a low quality landfill gas surrogate mixture was investigated both numerically, where carried out results have been validated against experimental data collected at laboratory engine.…”

Section: Introductionmentioning

confidence: 99%

Application of different numerical models capable to simulate combustion of alternative fuels in internal combustion engine

Adamczyk

Kruczek

Białecki

et al. 2019

HFF

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Purpose The internal combustion engine operated on gaseous fuels shows great potential in terms of integration of the renewable and traditional sources for an effective solution for clean energy production challenge. Different fuel mixtures that can be used to power the engine are characterized by various combustion properties, which can affect its overall efficiency. The purpose of this paper is to provide reasonable answer, how the operation condition can change due to different fuel, without enormous cost of prototyping processes using physical models a digital model can be seen as promising technique. Design/methodology/approach Presented work discusses the application, and extensive description of two commercial codes Ansys Fluent and Forte for modeling stationary engine fueled by compressed natural gas (CNG) and biogas. To check the model accuracy, all carried out numerical results were compared against experimental data collected at in-house test rig of single cylinder four stroke engine. The impacts of tested gaseous fuel on the engine working conditions and emission levels were investigated. Findings Carried out simulations showed good agreement with experimental data for investigated cases. Application on numerical models give possibility to visualize flame front propagation and pollutant formation for tested fuels. The biogas fuel has shown the impaired early flame phase, which led to longer combustion, lower efficiency, power output, repeatability and in some cases higher HC and carbon monoxide (CO) emissions as a result of combustion during the exhaust stroke. Looking at the CO formation it was observed that it instantly accrue with flame front propagation as a result of methane oxidation, while for NOx formation revers effect was seen. Originality/value The application of new approach for modeling combustion process in stationary engines fueled by CNG and alternative biogas fuel has been discussed. The cons and pros of the Forte code in terms of its application for engine prototaping process has been discussed.

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A numerical investigation of lean operation characteristics of spark ignition gas engine fueled with biogas and added hydrogen under various boost pressures

Cited by 12 publications

References 25 publications

Conceptual Approach on Feasible Hydrogen Contents for Retrofit of CNG to HCNG under Heavy-Duty Spark Ignition Engine at Low-to-Middle Speed Ranges

Conceptual Approach on Feasible Hydrogen Contents for Retrofit of CNG to HCNG under Heavy-Duty Spark Ignition Engine at Low-to-Middle Speed Ranges

Impact of Simulated Biogas Compositions (CH4 and CO2) on Vibration, Sound Pressure and Performance of a Spark Ignition Engine

Application of different numerical models capable to simulate combustion of alternative fuels in internal combustion engine

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