Gaseous emissions from compressed natural gas buses in urban road and highway tests in China

Ting-ting, Yue; Chai, Fahe; Hu, Jingnan; Jia, Ming; Bao, Xiaojun; Li, Zhenhua; He, Liqang; Zu, Lei

doi:10.1016/j.jes.2016.01.028

Cited by 12 publications

(8 citation statements)

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“…Other types of vehicles that form an alternative to diesel buses are CNG and LNG vehicles. The benefits and limitations of using CNG buses are shown in the studies completed by, inter alia, Milojevic et al [95], Ivković et al [96], Merkisz et al [97], Yue et al [98], and Tica et al [99]. The study done by Dyr et al [100] shows interesting results of the analysis of costs and benefits of using CNG buses in public transport, whereas Jurkovič et al [101] analysed the possibility of decreasing the chosen environmental indicators by introducing LNG buses into bus transport.…”

Section: Literature Reviewmentioning

confidence: 99%

The Economic Effects of Electromobility in Sustainable Urban Public Transport

Pietrzak

2021

Energies

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This paper focuses on effects of implementing zero-emission buses in public transport fleets in urban areas in the context of electromobility assumptions. It fills the literature gap in the area of research on the impact of the energy mix of a given country on the issues raised in this article. The main purpose of this paper is to identify and analyse economic effects of implementing zero-emission buses in public transport in cities. The research area was the city of Szczecin, Poland. The research study was completed using the following research methods: literature review, document analysis (legal acts and internal documents), case study, ratio analysis, and comparative analysis of selected variants (investment variant and base variant). The conducted research study has shown that economic benefits resulting from implementing zero-emission buses in an urban transport fleet are limited by the current energy mix structure of the given country. An unfavourable energy mix may lead to increased emissions of SO2 and CO2 resulting from operation of this kind of vehicle. Therefore, achieving full effects in the field of electromobility in the given country depends on taking concurrent actions in order to diversify the power generation sources, and in particular on increasing the share of Renewable Energy Sources (RES).

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Section: Literature Reviewmentioning

confidence: 99%

The Economic Effects of Electromobility in Sustainable Urban Public Transport

Pietrzak

2021

Energies

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“…This is due to the decrease in laminar flame speed with an increase in the air-fuel ratio [218]. Figure 18 shows the variation in laminar flame speed of CH 4 and NG under atmospheric conditions. The maximum laminar flame speed for NG (around 38 cm/s, as also stated in Table 7) was obtained at ϕ = 1.1.…”

Section: Effect Of Ignition Timing and Ignition Energy Controlmentioning

confidence: 99%

“…[107]. 4 Heating value of stoichiometric mixture, a mixture in vapor state [107]. 5 Heating value of stoichiometric mixture, a mixture in vapor state [107].…”

Section: Volume Fraction (%)mentioning

confidence: 99%

“…LNG and CNG both indicate the stored forms of natural gas [141,142]. Most natural-gas vehicles worldwide operate with CNG as opposed to LNG [4]. Anderson et al [39] illustrated that liquefying natural gas is an option to consider for enhancing the performance of natural gas, which lacks initial energy content in its normal condition.…”

Section: Fuel Storage and Rangementioning

confidence: 99%

“…Natural gas is also a leading candidate for transportation vehicles in many countries mainly due to its vast abundance, its price, lower emission rates, and suitability of use in conventional diesel and gasoline engines. In fact, natural-gas combustion produces the lowest greenhouse-gas emissions of fossil fuels, together with a minimal level of suspended particles [4]. As a result, natural gas received great acceptance for fueling vehicles in recent years, and this is likely to rise in the coming years [5].…”

Section: Introductionmentioning

confidence: 99%

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Natural Gas Engine Technologies: Challenges and Energy Sustainability Issue

2018

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Energy sustainability and environmental issues pose greater challenges on different primary energy sectors as the global energy demand increases and it is projected to further increase with an upsurge in population. On the other hand, energy sources from conventional fossil-based fuels are depleting, forcing explorations in challenging and difficult locations. As a result, the use of alternative fuels received dramatic consideration to substitute these conventional fuels, of which natural gas took the significant share. However, the share of natural-gas vehicles in the current vehicle market is quite small, and it is estimated to be below 5%. This paper reviews the current resource scenarios including proven and potential reserves, current production, and consumption, along with the fueling infrastructure, distribution, and storage. It also provides summary of the development of fuel-injection technologies aimed to enhance the performance of gas engines. More attention was also given to natural-gas engines and their limitations. Parameters affecting the performance and combustion of compressed natural gas (CNG) in spark-ignition (SI) engines are thoroughly assessed, among which compression ratio and injection timing play major roles in the optimization of CNG-fueled engines. Furthermore, different technologies that help close the performance gap between conventional liquid-fuel and natural-gas engines and future directions of the research are presented.

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