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首页> 外文期刊>Journal of the air & waste management association >Nitrogen oxide emission calculation for post-Panamax container ships by using engine operation power probability as weighting factor: A slow-steaming case
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Nitrogen oxide emission calculation for post-Panamax container ships by using engine operation power probability as weighting factor: A slow-steaming case

机译：以发动机运行功率概率为加权因子计算Panamax后集装箱船的一氧化氮排放量：慢蒸情况

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摘要

In this study, the nitrogen oxide (NO_x) emission factors and total NO_x emissions of two groups of post-Panamax container ships operating on a long-term slow-steaming basis along Euro-Asian routes were calculated using both the probability density function of engine power levels and the NO_x emission function. The main engines of the five sister ships in Group I satisfied the Tier I emission limit stipulated in MARPOL (International Convention for the Prevention of Pollution from Ships) Annex VI, and those in Group II satisfied the Tier II limit. The calculated NO_x emission factors of the Group I and Group II ships were 14.73 and 17.85 g/ kWhr, respectively. The total NO_x emissions of the Group II ships were determined to be 4.4% greater than those of the Group I ships. When the Tier II certification value was used to calculate the average total NO_x emissions of Group II engines, the result was lower than the actual value by 21.9%. Although fuel consumption and carbon dioxide (CO_2) emissions were increased by 1.76% because of slow steaming, the NO_x emissions were markedly reduced by 17.2%. The proposed method is more effective and accurate than the NO_x Technical Code 2008. Furthermore, it can be more appropriately applied to determine the NO_x emissions of international shipping inventory. Implications: The usage of operating power probability density function of diesel engines as the weighting factor and the NO_x emission function obtained from test bed for calculating NO_x emissions is more accurate and practical. The proposed method is suitable for all types and purposes of diesel engines, irrespective of their operating power level. The method can be used to effectively determine the NO_x emissions of international shipping and inventory applications and should be considered in determining the carbon tax to be imposed in the future.
机译：在这项研究中，使用发动机的概率密度函数，计算了在欧亚航线上长期缓慢汽运的两组巴拿马型后巴拿马型集装箱船的氮氧化物（NO_x）排放因子和总NO_x排放量功率水平和NO_x排放函数。第一类的五艘姊妹船的主机满足MARPOL（国际防止船舶造成污染公约）附则VI规定的第一类排放限值，第二类的主机满足第二类限值。第一类和第二类船舶的计算NO_x排放因子分别为14.73和17.85 g / kWhr。确定第二类船舶的总NO_x排放量比第一类船舶的总NO_x排放高4.4％。当使用Tier II认证值来计算Group II发动机的平均总NO_x排放量时，结果比实际值低21.9％。尽管由于缓慢的蒸煮而使燃料消耗和二氧化碳（CO_2）排放增加了1.76％，但NO_x排放却显着减少了17.2％。所提出的方法比2008年《 NO_x技术规范》更加有效和准确。此外，它可以更适合地用于确定国际运输清单的NO_x排放量。启示：使用柴油机的工作功率概率密度函数作为加权因子，以及从试验台获得的NO_x排放函数来计算NO_x排放更为准确和实用。所提出的方法适用于所有类型和目的的柴油发动机，而不管其运行功率水平如何。该方法可用于有效地确定国际运输和库存应用中的NO_x排放量，并且在确定将来要征收的碳税时应考虑该方法。

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    Chih-Wen Cheng; Jian Hua; Daw-Shang Hwang;

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    Department of Marine Engineering, National Taiwan Ocean University, Keelung, Taiwan, Republic of China;

    Department of Marine Engineering, National Taiwan Ocean University, Keelung, Taiwan, Republic of China;

    Department of Marine Engineering, National Taiwan Ocean University, Keelung, Taiwan, Republic of China;

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