Performance and emission characteristics of a port fuel injected, spark ignition engine fueled by compressed natural gas

Duc, Khanh Nguyen; Duy, Vinh Nguyen; Hoang, D.L.; Viet, Thanh Nguyen; Le, Anh Tuan

doi:10.1016/j.seta.2018.12.018

Cited by 46 publications

(24 citation statements)

References 23 publications

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“…Biomethane produced from biogas upgrading is an attractive biofuel as it is mostly made up of methane (more than 97%) [20,21]. The adoption of biomethane does not require any conversion of traditional natural gas-fueled engines and can be easily stored on board as compressed gas [22] or in a liquid state after a liquefaction process [23,24]. Many authors have investigated the potential of producing biomethane from anaerobic digestion plants: Salama et al [25] focused on maximizing biomethane production by improving the digester diet.…”

Section: Introductionmentioning

confidence: 99%

Biogas from Anaerobic Digestion: Power Generation or Biomethane Production?

et al. 2020

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Biogas is a fuel obtained from organic waste fermentation and can be an interesting solution for producing electric energy, heat and fuel. Recently, many European countries have incentivized the production of biomethane to be injected into natural gas grids or compressed and used as biofuel in vehicles. The introduction of an upgrading unit into an existing anaerobic digestion plant to convert biogas to biomethane may have a strong impact on the overall energy balance of the systems. The amount of biomethane produced may be optimized from several points of view (i.e., energy, environmental and economic). In this paper, the mass and energy fluxes of an anaerobic digestion plant were analyzed as a function of the biogas percentage sent to the upgrading system and the amount of biomethane produced. A numerical model of an anaerobic digestion plant was developed by considering an existing case study. The mass and energy balance of the digesters, cogeneration unit, upgrading system and auxiliary boiler were estimated when the amount of produced biomethane was varied. An internal combustion engine was adopted as the cogeneration unit and a CO 2 absorption system was assumed for biogas upgrading. Results demonstrated that the energy balance of the plant is strictly dependent on the biomethane production and that an excess of biomethane production makes the plant totally dependent on external energy sources. As for the environmental impact, an optimal level of biomethane production exists that minimizes the emissions of equivalent CO 2 . However, high biomethane subsides can encourage plant managers to increase biomethane production and thus reduce CO 2 savings.

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Section: Introductionmentioning

confidence: 99%

Biogas from Anaerobic Digestion: Power Generation or Biomethane Production?

et al. 2020

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“…Xu [16] applied the pre-injection method on CNG vehicles compared to diesel engines. Yuvenda [18] reduced the time for its injection into the engine, while Nguyen [17] developed a model with one hole. These three studies focused on developing the injection method for engine performance without discussing the control system during deceleration.…”

Section: Introductionmentioning

confidence: 99%

Modelling Fuel Cut Off Controller on CNG Engines Using Fuzzy Logic: A Prototype

Munahar¹,

Setiyo²,

Saudi³

et al. 2022

Int. J. Adv. Sci. Eng. Inf. Technol.

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Compressed Natural Gas (CNG) is an alternative solution to the limited availability of fossil energy. CNG use's advantages include high octane value, applicable to vehicles requiring large power, cost-effectiveness, and lower emissions. However, applying the old CNG kit leaves emission problems and fuel wastage during deceleration. Although numerous studies have been carried out with numerous variables to improve engine performance and emissions, reports regarding deceleration interventions are still limited. Therefore, this study proposes enhanced modeling to optimize the fuel cut-off controller by applying fuzzy logic by controlling the throttle valve position based on the input sensor of the engine. Engine dynamics, fuel characteristics, and intake systems are considered strictly in the development of the control system to obtain more precise results that refer to the complete combustion process. The designed model has advantages over previous studies, which focused on achieving CNG AFR stoichiometry to improve fuel economy by using the fuel cut-off method during deceleration. The results showed that fuel savings could be increased during deceleration by cutting off fuel flow to the engine. This can be seen from the increase in AFR ± 57% and decrease ± 38% -67% in CNG flow rate during deceleration which is promising to be widely applied. In the future, the proposed model could be used as part of the vehicle component in optimizing the fuel consumption that will support green technology sustainability.

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“…Currently used government subsidies are used to promote the production of biomethane injected into the natural gas grid [36]. Biomethane is mainly composed of methane (more than 97%) [37] and is desirable in the transportation sector as either a compressed gas [38] or in the liquid state [39]. The potential for biomethane production is currently focused on maximizing production by improving the fermenter diet [40] and forecasting production [41].…”

Section: Introductionmentioning

confidence: 99%

Investment Model of Agricultural Biogas Plants for Individual Farms in Poland

et al. 2021

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The main idea of a circular economy (CE) is to separate economic growth from resource consumption and environmental impacts. The characteristic approach of a CE assumes the minimisation of the amount of waste generated at the design level and, as a standard, includes innovations throughout the value chain. From an agricultural point of view, agricultural biogas plants are particularly important because they enable the management of all waste biomass and its conversion into useful energy and agricultural fertiliser. This paper presents methods for assessing the economic effectiveness of an investment in an agricultural biogas plant. The research goal was to develop a financial model. The authors of this study used available examples of the profitability of commercial ventures. We considered the investment aspects of agricultural biogas plants. Exemplary solutions are discussed, allowing the reader to become acquainted with various methods and proposals for thus far estimated investments. It may seem chaotic, but this is how the biogas market is characterised in the context of the implementation of biogas projects. Guidance is given regarding how to understand investing in this sensitive private farming sector. It is admirable that the renewable energy market has been systematised, and we hypothesise that it is necessary to develop an investment model in Polish conditions.

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Performance and emission characteristics of a port fuel injected, spark ignition engine fueled by compressed natural gas

Cited by 46 publications

References 23 publications

Biogas from Anaerobic Digestion: Power Generation or Biomethane Production?

Biogas from Anaerobic Digestion: Power Generation or Biomethane Production?

Modelling Fuel Cut Off Controller on CNG Engines Using Fuzzy Logic: A Prototype

Investment Model of Agricultural Biogas Plants for Individual Farms in Poland

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