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Author

Peiyong Ni

Bio: Peiyong Ni is an academic researcher from Nantong University. The author has contributed to research in topics: Diesel fuel & Diesel engine. The author has an hindex of 2, co-authored 3 publications receiving 47 citations.

Papers
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Journal ArticleDOI
01 Nov 2020-Fuel
TL;DR: In this article, a review of emission regulations and emission factors (EFs), environmental effects and available emission reduction solutions for marine diesel engines is presented, which shows that the integrated multi-pollutant treatment for ship emissions holds great promise.

146 citations

Journal ArticleDOI
15 Sep 2018-Fuel
TL;DR: In this article, the temporal and spatial variations of the mean and instantaneous in-cylinder soot size and number density in a single cylinder direct injection diesel engine have been simulated numerically at different operating conditions, injection system parameters, fuel types and piston bowl geometry using AVL-FIRE code.

12 citations

Journal ArticleDOI
TL;DR: In this paper , the shape of the combustion chamber of a two-cylinder diesel engine with high-pressure common rail direct injection (CRDI) system was determined by comparing the fuel economy and soot emission of diesel engines.

1 citations

Journal ArticleDOI
TL;DR: In this paper , the formaldehyde and inhalable particles in sidestream smoke emitted from four common brands of cigarettes in an environmental chamber were monitored by using a hand-held formaldehyde detector and a particulate detector.
Abstract: Side-stream smoke from cigarettes contains formaldehyde, inhalable particulate matter and other pollutants, which seriously affects human health. The formaldehyde and inhalable particles in sidestream smoke emitted from four common brands of cigarettes in an environmental chamber were monitored by using a hand-held formaldehyde detector and a particulate detector. The concentration of the pollutants was also studied under conditions of closeness, natural ventilation and mechanical ventilation. The results show that the burning rates of four brands of cigarettes range from 2.65 to 3.0 g/h in the enclosed environment chamber and the peak concentrations of formaldehyde emissions range from 1.02 to 1.72 mg/m3. The release process of particulate matter can be divided into release diffusion stage and sedimentation stage. The peak concentrations of PM2.5 and PM10 is 0.282 and 3.382 mg/m3, respectively. The sedimentation rates of PM2.5 and PM10 are 0.0180 and 0.0289 mg/m 3.h-1, respectively. It is found that the removal rate of formaldehyde and particulate matter is positively correlated with the ventilation rate. The fitting correlation coefficients of formaldehyde concentration during the rise and fall phases under closed conditions are greater than 0.968 and 0.979, respectively, and the coefficients of PM2.5 and PM10 are greater than 0.904 and 0.929, respectively.

1 citations

Journal ArticleDOI
TL;DR: In this article , the authors quantitatively analyzed water injection mass and timing effects on oxy-fuel combustion performance from a GDI engine fuelled with E10 (10% ethanol and 90% gasoline in mass) by simulation.
Abstract: The climate change issue has become a growing concern due to the increasing greenhouse gas emissions. To achieve carbon neutrality for mitigating the climate problem, the oxy-fuel combustion (OFC) technique on internal combustion engines (ICEs) has attracted much attention. Furthermore, the water injection (WI) strategy was proven effective in improving the combustion process and thermal efficiency in engines under OFC mode. However, WI strategy effects on gasoline direct injection (GDI) engines fuelled with gasoline–alcohol blends have not been reported. This study quantitatively analysed WI mass and timing effects on oxy-fuel combustion performance from a GDI engine fuelled with E10 (10% ethanol and 90% gasoline in mass) by simulation. The results show that equivalent brake-specific fuel consumption (BSFCE) shows a monotonically decreasing trend with the increase in the water–fuel mass ratio (Rwf) from 0 to 0.2. However, further increasing Rwf would cause a deterioration in BSFCE due to the enhanced cooling effects of water vaporisation. Moreover, an appropriate water injection timing (tWI) could be explored for improving OFC performance, especially for large Rwf conditions. The difference in BSFCE between tWI = −100°CA and tWI = −60°CA can be up to around 6.3 g/kWh by increasing Rwf to 0.6.

Cited by
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Journal ArticleDOI
TL;DR: The different emission reduction technologies of marine diesel engines are summarized through three reduction paths of fuel optimization, pre-combustion control and exhaust after-treatment to reduce the pollutant emissions.

84 citations

Journal ArticleDOI
TL;DR: In this paper, a tripartite evolutionary game model that introduces the prospect theory and verifies numerical examples in combination with system dynamics simulation methods is presented to evaluate the influence of evolutionary stability strategies on the development of electric ship industry.

61 citations

Journal ArticleDOI
25 Aug 2021
TL;DR: In this paper, the authors investigated the possibility of importing renewable methanol comprised of hydrogen and carbon dioxide, and derived the net production costs of methanols as a function of hydrogen consumption and additional shipping costs.
Abstract: The importing of renewable energy will be one part of the process of defossilizing the energy systems of countries and regions, which are currently heavily dependent on the import of fossil-based energy carriers. This study investigates the possibility of importing renewable methanol comprised of hydrogen and carbon dioxide. Based on a methanol synthesis simulation model, the net production costs of methanol are derived as a function of hydrogen and carbon dioxide expenses. These findings enable a comparison of the import costs of methanol and hydrogen. For this, the hydrogen production and distribution costs for 2030 as reported in a recent study for four different origin/destination country combinations are considered. With the predicted hydrogen production costs of 1.35–2 €/kg and additional shipping costs, methanol can be imported for 370–600 €/t if renewable or process-related carbon dioxide is available at costs of 100 €/t or below in the hydrogen-producing country. Compared to the current fossil market price of approximately 400 €/t, renewable methanol could therefore become cost-competitive. Within the range of carbon dioxide prices of 30–100 €/t, both hydrogen and methanol exhibit comparable energy-specific import costs of 18–30 €/GJ. Hence, the additional costs for upgrading hydrogen to methanol are balanced out by the lower shipping costs of methanol compared to hydrogen. Lastly, a comparison for producing methanol in the hydrogen's origin or destination country indicates that carbon dioxide in the destination country must be 181–228 €/t less expensive than that in the origin country, to balance out the more expensive shipping costs for hydrogen.

61 citations

Journal ArticleDOI
01 May 2021-Fuel
TL;DR: In this article, the combustion performances and emission characteristics of co-firing CH4/NH3/air flame with NH3 mole fraction from 0 to 1.0 are investigated in a swirl combustor.

55 citations

Journal ArticleDOI
15 Aug 2021-Energy
TL;DR: In this paper, the influence of the doping of different types of nanoparticles into the bioethanol-diesel fuel blends on the combustion, performance, and emission aspects is discussed.

36 citations