双燃料船舶主机余热及LNG冷能利用分析  

Analysis of Waste Heat and LNG Cold Energy Utilization of Main Engine of Dual Fuel Ship

作　　者：朱柏彤 李彦军[1] 张强 杜威 ZHU Baitong;LI Yanjun;ZHANG Qiang;DU Wei(College of power and energy engineering,Harbin Engineering University,Harbin 150001,China;School of Energy and Power Engineering,Jiangsu University of Technology,Zhenjiang 212100,China)

机构地区：[1]哈尔滨工程大学动力与能源工程学院,哈尔滨150001 [2]江苏科技大学能源与动力学院,镇江212100

出　　处：《工程热物理学报》2022年第11期2893-2903,共11页Journal of Engineering Thermophysics

基　　金：“高技术船舶专项1.0”(No.2016-544)。

摘　　要：本文针对某型双燃料船舶主机天然气燃料冷能及其排烟余热利用特点,设计主机余热和LNG冷能相结合的冷能余热回收方案。建立了系统数学模型。在设计工况点和变工况条件下分别对系统使用不同工质时的性能进行了计算和比较。系统的最佳工质为R245fa。结果表明,在设计工况点下,以R245fa为工质时系统性能最好,每年可减少二氧化碳排放514.76 t。变工况条件下,R245fa工质最高循环效率为68.27%,最高循环热效率为28.14%,最高输出净功为5692.77 kW。In this paper, according to the characteristics of natural gas fuel cold energy and exhaust waste heat utilization of a certain type of dual fuel ship, a cold energy waste heat recovery scheme combining main engine waste heat and LNG cold energy is designed. The mathematical model of the system is established. The performance of the system with different working fluids is calculated and compared at the design working point and under variable working conditions. The best working medium of the system is R245fa. The results show that at the design operating point, the system performance is the best when R245fa is used as the working medium, and the carbon dioxide emission can be reduced by 514.76 tons per year. Under variable working conditions, the maximum cycle efficiency of R245fa working medium is 68.27%, the maximum cycle thermal efficiency is 28.14%,and the maximum output net work is 5692.77 kW.

关 键 词：LNG冷能 船舶余热 超临界二氧化碳 有机朗肯循环 

分 类 号：U66[交通运输工程—船舶及航道工程]