Modeling and Performance of Gas Turbine Cycles with Various Means of Blade Cooling

冷却液 涡轮叶片 联合循环 核工程 燃气轮机 工业气体 机械工程 锅炉(水暖) 热力循环 热力学 环境科学 工程类 材料科学
作者
Kristin Jordal
链接
摘要

A method for simulating the cooled gas turbine is demonstrated. Based on equations and other knowledge found in the literature, a first-law thermodynamic, non-dimensional model is established and implemented in the equation-solving, programmable software IPSEpro. Increasing the water vapor or carbon dioxide contents of the gas turbine hot gas is found not to have an impact on the Stanton number, which is employed for the modeling of the heat transfer to the blade. The model is validated using experimental data from an industrial gas turbine and data found in the literature, and is found to give results easily in concordance with the case with which it is matched. Based on the validation, a reference gas turbine is established and employed for various cycle calculations. First, it is shown how gas turbine efficiency can increase with decreased coolant temperature and with a decrease in the ratio of specific heats between hot gas and coolant. Simple-cycle simulations are done to illustrate the impact of coolant pre-cooling, cooling with humid air and cooling with steam. Due to its high specific heat, steam is shown to have the best capacity for cycle performance enhancement. For the single-pressure combined cycle, it is shown how steam for cooling of the first gas turbine vane can be flashed from the water leaving the economiser in a split stream boiler. This is found to give a considerable increase in cycle thermal efficiency (more than three percentage points), but the concept needs to be further evaluated in order to establish whether it is technically feasible. For the studies of the HAT cycle, the role of the compressor modeling is emphasized. For a compressor with a given geometry, extracting a reduced amount of air for cooling will give an increase in the pressure ratio, which will have a positive impact on the HAT cycle thermal efficiency, but it will also, in practice, lead to the surge margin being approached. For cooling with humid air, there will be no significant increase in the HAT cycle thermal efficiency if the compressor ratio is maintained constant. Designing gas turbine cycles with a high thermal efficiency is not a goal in itself; also good economic performance is important. The impact of cooled blades for the profitability of the gas-turbine based power plant is illustrated briefly, with focus on heat resistance versus materials cost and on compressor washing intervals. (Less)

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
大幅提高文件上传限制,最高150M (2024-4-1)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
JasonWu完成签到 ,获得积分10
11秒前
LT完成签到 ,获得积分10
11秒前
扶风阁主完成签到,获得积分10
16秒前
秋夜临完成签到,获得积分10
34秒前
菠萝蜜完成签到 ,获得积分10
35秒前
isedu完成签到,获得积分10
46秒前
啥时候能早睡完成签到 ,获得积分10
46秒前
Jonsnow完成签到 ,获得积分10
51秒前
wefor完成签到 ,获得积分10
1分钟前
zyw完成签到 ,获得积分10
1分钟前
传奇完成签到 ,获得积分10
1分钟前
霸气白曼完成签到 ,获得积分10
1分钟前
李彪完成签到 ,获得积分0
1分钟前
jjy完成签到,获得积分10
1分钟前
J陆lululu完成签到 ,获得积分10
1分钟前
jj824完成签到 ,获得积分10
1分钟前
Arthur完成签到,获得积分10
1分钟前
Wayne72完成签到,获得积分10
1分钟前
张占完成签到,获得积分10
1分钟前
1分钟前
nteicu发布了新的文献求助10
1分钟前
明朗完成签到 ,获得积分10
2分钟前
糊涂的乞完成签到 ,获得积分20
2分钟前
大水完成签到 ,获得积分10
2分钟前
zzr完成签到 ,获得积分10
2分钟前
TerryWei完成签到 ,获得积分10
2分钟前
苇一完成签到,获得积分10
2分钟前
loren313完成签到,获得积分10
2分钟前
Guo完成签到 ,获得积分10
2分钟前
俊逸灵松完成签到 ,获得积分10
2分钟前
坚强的缘分完成签到 ,获得积分10
2分钟前
科研通AI2S应助科研通管家采纳,获得10
2分钟前
童童应助科研通管家采纳,获得10
2分钟前
勤奋凡之完成签到 ,获得积分10
2分钟前
波波完成签到 ,获得积分10
3分钟前
hongt05完成签到 ,获得积分10
3分钟前
又又完成签到,获得积分10
3分钟前
TORCH完成签到 ,获得积分10
3分钟前
想吃麻辣烫完成签到 ,获得积分10
3分钟前
SAINT完成签到 ,获得积分10
3分钟前
高分求助中
Un calendrier babylonien des travaux, des signes et des mois: Séries iqqur îpuš 1036
Sustainable Land Management: Strategies to Cope with the Marginalisation of Agriculture 1000
Corrosion and Oxygen Control 600
Python Programming for Linguistics and Digital Humanities: Applications for Text-Focused Fields 500
Heterocyclic Stilbene and Bibenzyl Derivatives in Liverworts: Distribution, Structures, Total Synthesis and Biological Activity 500
重庆市新能源汽车产业大数据招商指南(两链两图两池两库两平台两清单两报告) 400
Division and square root. Digit-recurrence algorithms and implementations 400
热门求助领域 (近24小时)
化学 材料科学 医学 生物 有机化学 工程类 生物化学 纳米技术 物理 内科学 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 电极 光电子学 量子力学
热门帖子
关注 科研通微信公众号,转发送积分 2546041
求助须知:如何正确求助?哪些是违规求助? 2175672
关于积分的说明 5600229
捐赠科研通 1896383
什么是DOI,文献DOI怎么找? 946268
版权声明 565379
科研通“疑难数据库(出版商)”最低求助积分说明 503557