共查询到19条相似文献,搜索用时 125 毫秒
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介绍一种计算燃气轮机涡轮变工况特性的方法,给出了主要公式、主要公式的推导、计算表格和气体动力函数的主要公式。采用气体动力函数为工具便于实现计算机编程。特性用折合参数形式表达,可通用于涡轮各种工况。与压气机特性一起可完成燃气轮机联合工作线计算,确定启动过程和变负荷特性,对于设计新的燃气轮机和研究在运的燃气轮机是必不可少的。本方法曾用于工厂燃气轮机设计计算。 相似文献
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文章基于相似理论方法分析燃气轮机变工况性能,提出采用一流量修正系数修正参考工况点的无因次准则数,用来模拟燃气轮机共同工作线,并对一增压流化床联合循环电站的燃气轮机机组由于环境状况和负荷要求变化引起的变工况分别作了示例计算,结果表明本方法可以用作缺乏设备详细性能特性时,燃气轮机变工况性能的近似估算。 相似文献
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塔式布置燃气轮机余热锅炉刚性梁,大跨度采用了网络结构,在承受风压,风载,地震载何等工况下,对主要承力元件做了受力分析,刚度计算和强度计算。 相似文献
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本文对一般的分轴燃气轮机装置变工况特性作了分析,指出牵引(低压)透平阻塞边界,超导边界及空载边界形成的物理概念;指出采用透平可调喷咀和压气机可转导叶的分轴装置可进一步扩大和改善变工况性能。在此基础上,结合“哈尔滨汽轮机厂”7000马力高原机车燃气轮机装置变工况计算的实例,对机械传动的机车燃气轮机装置变工况的特点作了分叶和研究。 相似文献
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针对传统均值标准差阈值法不能用于变工况故障预警这一问题,以三轴燃气轮机的性能仿真模型为基础,提出了基于Bootstrap方法的气路参数波动比阈值计算模型,对三轴燃气轮机0.8以及1.0工况下的低压涡轮出口温度T6进行故障预警研究,并与传统均值标准差阈值法进行预警结果对比。结果表明:该计算模型用于预警阈值计算的样本量更丰富、具有更高的可信度;其得到的预警阈值单值图,在燃气轮机与样本数据运行情况较为一致时可作为燃气轮机的固有属性,对于变工况故障预警及运行情况较为相近的燃气轮机故障预警同样适用;预警阈值偏差仅为-0.015%,相较于传统的动态阈值法减少了计算量。 相似文献
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Gas turbines are increasingly and widely used,whose research and production reflect a country’s industrial capacity and level.Due to the changeable working environment,gas turbines usually work under the condition of simultaneous changes of ambient temperature,load and fuel.However,the current researches mainly focus on the change in single condition,and do not fully consider the simultaneous change in different conditions.On the basis of single condition,this paper further studies the dual off-design performance of gas turbines under three conditions:temperature-load,fuel-load and fuel-temperature.Firstly,the whole machine model of a gas turbine is established,in which the compressor model has the greatest impact on the performance of gas turbines.Therefore,this paper obtains a more accurate compressor model by combining the engineering modeling advantages of gPROMs and the powerful mathematical calculation ability of MATLAB neural network.Then,according to the established gas turbine model,the dual off-design performance is studied,which is mainly based on the parameter of output and efficiency.The result shows that the efficiency and power output of gas turbines will decrease with the increase of ambient temperature.With the decrease of fuel calorific value,power output and efficiency will increase.As the load decreases,the efficiency of the gas turbines will decrease,and these changes are consistent with the single off-design performance.However,when the fuel and temperature change simultaneously,only adjusting the IGV angle cannot avoid the surge when the temperature is above 30°C.At this time,it is necessary to adjust the extraction rate in order to ensure the safe and stable operation of gas turbines.Therefore,the research on dual off-design performance of gas turbines has an important significance for the peak shaving operation of gas turbines. 相似文献
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湿化燃气轮机循环的性能分析 总被引:1,自引:0,他引:1
能源危机和环境污染的问题使人们对能源利用效率和环保的要求日益增加,同时经济的快速发展也使人们对电能的需求量越来越大。据国际能源协会(IEA)预测,电能的消耗将以平均每年2·4%的速度增长,因此效率高、比功输出大、对环境污染少成为目前发电技术所努力追求的目标。随着分布 相似文献
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《Energy》2004,29(1):71-85
The purpose of this study was to analyze the relationship between the part load performance and design performance of gas turbines and combined cycle plants. The effect of power control strategy on the part load performance of the combined cycle was also examined. The analysis was carried out using a proven cycle simulation program. Based upon the design performances of actual gas turbines, a consistent principle of design point selection was applied to four different gas turbines representing various technology levels. The part load control strategies considered were fuel-only control and IGV control. It has been observed that gas turbines with higher design performances exhibit superior part load performances. Since the average combined cycle performance is affected by the range of IGV control, as well as its temperature control principle, a control strategy appropriate for the load characteristics of the individual plant should be adopted. 相似文献
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对中国石化安庆分公司催化裂化装置三机组烟气轮机组在MIP技术改造后的运行状况进行分析,总结出影响烟机能量回收的因素,并提出了通过采取优化烟机操作、增加入口烟气量、减少烟气管道温度损失以及对辅助系统进行改造等措施,来提高烟机运行效率的方案。 相似文献
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随着多联产及其它甲醇化工的发展.不可避免会涉及到燃用甲醇的燃气轮机的应用。本文对直接及间接燃用甲醇的燃气轮机的研发情况进行了综述。研究表明:甲醇是燃气轮机现实可行、性能优良的未来替代液体燃料之一。燃用甲醇的燃气轮机具有比燃用目前碳氢液体燃料更低的有害气体和温室气体的排放。由于燃料甲醇热值低、具有腐蚀性、滑润性差、着火点低及汽化潜热大等特点,因此直接燃用甲醇的燃气轮机燃料系统及透平等部件需要进行一定程度的改造。利用甲醇重整反应间接燃用甲醇可以更好地改善燃料的燃烧性能,实现稳燃及优于燃用CH。的N0x排放,甚至可能实现优于常规联合循环的效率。 相似文献