氨燃料燃气轮机化学回热循环性能分析  

Thermodynamic performance simulation of NH3 based chemically recuperated cycle gas turbine

作　　者：杨仁[1] 杨晓红 邵晓峰 郑洪涛[1] 赵宁波[1] YANG Ren;YANG Xiaohong;SHAO Xiaofeng;ZHENG Hongtao;ZHAO Ningbo(College of Power and Energy Engineering,Harbin Engineering University,Harbin 150001,China;Shenyang Liming Aero Engine Company Limited,Aero Engine Corporation of China,Shenyang 110043,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]中国航发沈阳黎明航空发动机有限责任公司,沈阳110043

出　　处：《航空动力学报》2024年第12期254-259,共6页Journal of Aerospace Power

基　　金：中央高校基本科研业务费专项资金(3072022TS0308);国家科技重大专项(2017-Ⅲ-0006-0031)。

摘　　要：氨燃料化学回热循环利用轮机排气余热来裂解氨生成NH3/H2/N2混合气体,不仅能提高循环热效率,还能够改善燃烧稳定性。以某型船用分轴燃气轮机为基础,采用总体性能仿真分析方法,对比研究在化学平衡状态和不同Ru基催化剂作用下化学回热循环变工况性能。结果表明:在输出功率12~26 MW范围内,简单循环热效率为30.5%~39%,在化学平衡反应状态下,化学回热燃气轮机(CRGT)循环热效率为40.4%~50.5%,在Ru基催化剂作用下,CRGT循环热效率为37.8%~46.6%;当给定催化剂和空速比时,在变工况范围内氨转化率的变化不大;在化学平衡状态和Ru基催化剂作用下,氨转化率分别为95%和40%,化学反应吸热量占比为56.5%和32%,燃料低热值(LHV)增加约为13.3%和5.4%;采用Ru基催化剂时,能够在变工况范围内显著地改善燃烧稳定性。The chemically recuperated cycle gas turbine is a promising NH3-fueled gas turbine,as it could improve the thermal efficiency and premixed burning stability effectively by partially decomposing NH3 into NH3/H2/N2 blended mixture with exhaust heat.The effects of catalyst activities(e.g.chemical equilibrium state and various Ru-based catalysts)on overall thermodynamic performance of a chemically recuperated gas turbine(CRGT)at off-design cases were investigated.Results indicated that:while thermal efficiency of a simple cycle gas turbine was about 30.5%—39%within net power ranges of 12—26 MW,it was about 40.4%—50.5%of a CRGT cycle at the equilibrium state and about 37.8%—46.6%over the Ru-based catalysts.For a certain catalyst and a constant gas hourly space velocity,the NH3 conversation rates varied slightly at off-design cases of a CRGT cycle,which was about 95%at the equilibrium state and about 40%over a Ru-based catalyst.Correspondingly,the chemical reaction heat per overall recuperated waste heat were about 56.5%and 32%,respectively.Furthermore,the low heating value(LHV)could be relatively improved about 13.3%and 5.4%by NH3 cracking in chemical recuperation system at the equilibrium state and Ru-based catalyst.Generally,the premixed flame could be stabilized significantly in a NH3-CRGT over a certain Ru-based catalyst.

关 键 词：氨燃料燃气轮机 化学回热燃气轮机(CRGT) 先进循环 总体性能分析 Ru催化剂 

分 类 号：V231.11[航空宇航科学与技术—航空宇航推进理论与工程]