An analysis of the energy efficiency of LNG ships powering options using the EEDI
An analysis of the energy efficiency of LNG ships powering options using the EEDI
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DOI：
10.1016/j.oceaneng.2015.09.040
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发表时间：
2015-12
影响因子：
5
通讯作者：
E. Attah;R. Bucknall
中科院分区：
文献类型：
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作者：
E. Attah;R. Bucknall
本文分析了考虑能源效率设计指标（EEDI）的LNG船未来的动力选择。国际海事组织最近批准了MARPOL附则6的修正案，将EEDI的适用范围扩大到包括LNG运输船（LNGC）。本文研究了即将到来的EEDI法规的影响，由于从2015年9月开始实施，将对未来的LNGCs的设计。研究发现，目前的EEDI参考基线不足以刺激未来LNGC设计的改进，因为建议安装在大多数未来LNGC订单上的当前双燃料柴油电动（DFDE）推进器已经达到符合EEDI基线的EEDI值。对采用新的二冲程气体喷射柴油推进系统的LNGC的EEDI值的分析也显示出类似的结果。然而，当考虑DFDE的未燃烧甲烷排放时，可以看到GHG排放指数值可能会上升高达115%，这意味着EEDI在减少全球变暖方面的价值有限。本文还提出并分析了修正的EEDI基线值LNGC以及建议的方法，包括甲烷泄漏排放到目前的EEDI计算。
This paper presents analyses future powering options for LNG carriers when considering the Energy Efficiency Design Index (EEDI). The IMO has recently approved amendments to MARPOL Annex 6 to extend the application of the EEDI to include LNG Carriers (LNGCs). This paper investigates the impacts of this upcoming EEDI regulation, due to be enforced from September 2015, will have on the design of future LNGCs. The study found that the current EEDI reference baseline is insufficient to stimulate improvements in the design of future LNGCs because the current Dual Fuel Diesel Electric (DFDE) propulsion proposed to be installed on majority of future LNGCs orders already achieves EEDI values that are compliant with the EEDI baseline. Analysis of EEDI values for LNGCs employing the new two-stroke gas injection diesel propulsion system also displayed similar results. However when considering unburnt methane emissions of the DFDE it was seen that the GHG emission index value could potentially rise by up to 115% meaning the EEDI is limited in its value to reduce global warming. This paper also proposes and analyses amendments to the EEDI baseline values for LNGCs as well as suggesting methods to include methane slip emissions into the current EEDI calculations.