船用双燃料发动机排放和经济性能分析  

Emission and economic performance analysis of dual fuel marine engine

作　　者：邓孜锦 蔡浩 王子赫 陈明亮 张富忠[1] 尹自斌[1] DENG Zijin;CAI Hao;WANG Zihe;CHEN Mingliang;ZHANG Fuzhong;YIN Zibin(School of Marine Engineering,Jimei University,Xiamen 361021,China;CSSC Marine Power Zhenjiang Co.,Ltd.,Zhenjiang 212002,China)

机构地区：[1]集美大学轮机工程学院,福建厦门361021 [2]中船动力镇江有限公司,江苏镇江212002

出　　处：《中国航海》2024年第2期128-133,144,共7页Navigation of China

基　　金：福建省教育厅项目(JT180270);福建省自然科学基金项目(2021J01846)。

摘　　要：某船用发动机在进气歧管加装燃气喷射系统改造为柴油/压缩天然气(CNG)双燃料发动机。为研究其排放性和经济性,分别在燃油模式、燃油模式+选择性催化还原法(SCR)及双燃料模式开展台架试验。结果表明:双燃料模式下发动机氮氧化合物(NO_(x))排放能达到燃油模式+SCR的排放水平,满足《国际防止船舶造成污染公约》(MARPOL)附则Ⅵ对NO_(x)排放第3阶段(TierⅢ)控制标准,但歧管进气方式导致碳氢化合物(HC)和一氧化碳(CO)排放高,难以满足《船舶发动机排气污染物排放限值及测量方法(中国第一、二阶段)》(GB 15097-2016)。对柴油/CNG双燃料发动机存在较高的HC和CO排放,MARPOL附则Ⅵ未作出限制,存在缺陷,有待修订完善。该发动机燃油模式+SCR及双燃料模式均满足TierⅢ,若其装船的船舶在MARPOL公约附则Ⅵ规定的排放控制区航行,尽管发动机采用燃油模式油耗率更低,但从燃料成本考虑,双燃料模式经济性更好。研究结果期望为船舶营运管理及行业公约、法规的修订提供参考。By adding a gas injection system to the intake manifold,a marine engine is converted into a dual-fuel diesel CNG engine.Bench tests are performed in fuel mode,fuel mode with SCR and dual-fuel mode to explore its emissions and economy.The results show that the NO_(x) emission of the engine in dual-fuel mode can reach the emission level of the fuel mode with SCR,which meets the Tier Ⅲ of MARPOL Annex Ⅵ for NO,emission.However,the manifold intake results in high HC and CO emission,which makes it difficult to meet the emission standard for marine engines in China(GB 15097-2016).MARPOL Annex VI does not impose any restrictions on dual-fuel diesel/CNG engines with high HC and CO emissions,an omission that needs to be reviewed and improved.Both the engine fuel mode with SCR and the dual fuel mode meet Tier Ⅲ standards.However,the dual-fuel mode is more cost effective than the engine-fuelled mode when the ship on which the engine is installed navigates in the MARPOL Annex Ⅵ emission control area.The results of the study are expected to serve as a reference for ship operation management and the revision of MARPOL Annex Ⅵ.

关 键 词：双燃料发动机 排放性能 经济性能 分析与评估 

分 类 号：U664.121.2[交通运输工程—船舶及航道工程]