摘要
采用计算流体力学(CFD)建立合理的船用废气重整制氢反应器模型,在进口重整气体温度为500℃、水碳比为2的工况下研究液化天然气(LNG)动力船废气重整制氢反应特性,研究重整气体的温度、水碳比和流速对反应特性的影响。研究结果表明:在反应区域,沿气体流动方向,H_(2)的摩尔分数逐渐增大,CH_(4)的摩尔分数逐渐减小,H_(2)O的含量先增加后减少。温度由400℃升高至1000℃,出口H_(2)的摩尔分数由8.4%增大至11.1%,重整反应的能量转换效率由19.48%提高至25.75%。水碳比由1升高至6,H_(2)的摩尔分数由8.2%增大至10.0%,后减小至9.8%;重整反应的能量转换效率先由18.03%提高至23.23%,后下降至22.61%。流速由0.01 m/s增大至0.10 m/s,H_(2)的摩尔分数由12.66%减小至4.90%,系统的能量转换效率由29.87%下降至11.06%。
A reasonable exhausted gas reformer model for hydrogen production of LNG powered ships is established using the computational fluid dynamics(CFD).The exhausted gas reforming process is numerically studied under conditions of inlet gas of 500℃and S/C=2(ratio of steam to carbon).The influences of temperature,S/C and inlet gas velocity on the reaction characteristics are investigated.The results show that along the gas path in the reforming zone,mole fractions of H_(2)and CH_(4)gradually increases and decreases respectively.Mole fraction of H_(2)O rises first and then drops.When the inlet gas temperature increases from400℃to 1000℃,mole fraction of H_(2)at outlet increases from 8.4%to 11.1%,and the energy transfer efficiency is improved from 19.48%to 25.75%.When the S/C changes from 1 to 6,mole fraction of H_(2)at outlet rises from8.2%to 10%,and the energy transfer efficiency increases from 18.03%to 23.23%.When the inlet gas velocity varies from 0.01 m/s to 0.1 m/s,mole fraction of H_(2)at outlet drops from 12.66%to 4.9%,and the energy transfer efficiency deceases from 29.87%to 11.06%.
作者
贺天智
林睿
刘书杰
彭佳杰
代黎博
王树信
HE Tianzhi;LIN Rui;LIU Shujie;PENG Jiajie;DAI Libo;WANG Shuxin(Marine Design and Research Institute of China,Shanghai 200011,China;CHEC Dredging Co.,Ltd.,Shanghai 201200,China)
出处
《船舶工程》
CSCD
北大核心
2022年第1期8-14,共7页
Ship Engineering
关键词
船舶
液化天然气(LNG)动力船
废气重整
制氢
反应特性
计算流体力学
ship
liquefied natural gas(LNG)powered ship
exhausted gas reforming
hydrogen production
reaction characteristics
computational fluid dynamics(CFD)
作者简介
贺天智(1995-),男,硕士研究生。研究方向:船舶新能源,船舶节能。
