Exhaust characteristics of Nitrous oxide from marine engine

Yoo, Dong-Hoon; Nitta, Yoshifuru; Ikame, Masaru; Hayashi, Mitsuru; Fujita, Hirotsugu; Lim, Jae-Keun

doi:10.1109/oceans-yeosu.2012.6263637

Cited by 3 publications

(3 citation statements)

References 16 publications

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“…The exhaust system of a vehicle is the region in which the highest density of infrared radiation energy can be observed [1][2][3]. The high-temperature exhaust gas of special vehicles mainly includes CO2, H2O, CO, SO2, NO2, NO, HC, and C particles [4,5], which enter the atmosphere to form a high-temperature exhaust jet. When a fluid flows into another fluid, there is momentum exchange between the inflowing jet fluid and the original fluid.…”

Section: Introductionmentioning

confidence: 99%

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A method based on ejector technology to suppress the infrared radiation of the special vehicle exhaust gas

Feng¹,

Jin²,

Wang³

et al. 2021

THERM SCI

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In this study, a method based on ejector technology is proposed to effectively suppress the infrared radiation associated with the exhaust gas of special vehicles such as tanks, armored vehicles, and missile carriers. These vehicles emit exhaust gases at very high temperatures. First, a mathematical model of the exhaust pipe was established for the exhaust system of a certain type of special vehicle. Then, the three-dimensional flow field outside the exhaust pipe was numerically simulated using Fluent 6.3 software. Thus, the temperature, pressure, and density of the exhaust-gas flow field before and after adopting the proposed ejector technique were obtained. Second, the statistical narrowband model based on the Lorentzian profile was used to determine the average absorption coefficient of a narrow band. Then, the finite volume method was used to solve the radiation transfer equation in the gaseous medium. Finally, the spectral radiation brightness and mid-infrared radiation intensity distribution of the exhaust gas before and after adopting the ejector technique were obtained. Results show that the proposed method considerably decreased the infrared radiation intensity of the exhaust gas by approximately 70%. Thus, using the proposed ejector technology, the infrared radiation associated with the exhaust system of special vehicles can be effectively suppressed.

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Section: Introductionmentioning

confidence: 99%

“…6) is used to sum the M faces (j = 1, 2, ..., M) of the ring surface of the control body; the sum is substituted into Eqs. (4) and(5) to obtain the following equation.…”

mentioning

confidence: 99%

A method based on ejector technology to suppress the infrared radiation of the special vehicle exhaust gas

Feng¹,

Jin²,

Wang³

et al. 2021

THERM SCI

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“…In addition to CO 2 causing the greenhouse effect, ship exhaust gas also contains a large amount of pollutants such as sulfur oxides (SO x ), nitrogen oxides (NO x ), particulate matter (PM), and carbon monoxide (CO). [1,2] The International Maritime Organization (IMO) issued Convention of MARPOL 73/78 Annex VI, which lists relevant requirements for SO x and NO x emissions from ship exhaust. Marine diesel engines generally use heavy fuel oil with a 3.5% sulfur content.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Removal of Real Exhaust Pollutants from a Diesel Engine by Activated Carbon

et al. 2019

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So far, most of the experimental researchers studying the removal of diesel exhaust pollutants have done so with simulated exhaust gas, which cannot demonstrate the ability of catalysts accurately. Because activated carbon (AC) has low price, no secondary pollution, good adsorption performance, and certain catalytic activity, it has good application prospects in the field of marine exhaust pollutant removal. In this paper, the removal of particulate matter (PM), carbon monoxide (CO), and NO x from real exhaust gas by AC was studied. The results show that PM removal efficiency reached up to 77%, while the pressure drop increased with running time. AC may degenerate to some extent with the increase of temperature, resulting in a negative removal efficiency of CO. The denitration efficiency of AC was up to 34.5% without urea, and further increased to 44.8% after spraying urea, still a distance from industrial applications. In the future, it may be necessary to install a fan to compensate the reactor or to backwash the reactor to avoid excessive pressure drop. The thermal stability of the AC also needs to be improved. To increase the denitration performance, it may be helpful to modify the AC or impregnate other metal oxides.

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A Experimental Study on Nitrous Oxide Formation in Direct Injection Diesel Engine

Yoo¹

2015

J. Korean Soc. Mar. Environ. Saf.

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Exhaust characteristics of Nitrous oxide from marine engine

Cited by 3 publications

References 16 publications

A method based on ejector technology to suppress the infrared radiation of the special vehicle exhaust gas

A method based on ejector technology to suppress the infrared radiation of the special vehicle exhaust gas

Experimental Study on the Removal of Real Exhaust Pollutants from a Diesel Engine by Activated Carbon

A Experimental Study on Nitrous Oxide Formation in Direct Injection Diesel Engine

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