大涡模拟在船用燃气轮机进气流场中的应用

燃气轮机进气系统的结构和气动性能是燃气轮机装舰技术研究的一个重要组成部分。针对这方面的要求,进行燃气轮机进气系统的设计及数值模拟计算,为设计制造高性能的船用燃气轮机进气系统提供可靠的依据。对两种方案的进气系统作了数值计算和实验研究,其结果是相当令人满意的,对进气系统的实际使用具有非常重要的意义。     

出口形式对防浪级阻力性能影响的研究

燃气轮机进气系统的结构和气动性能是燃气轮机装舰技术研究的重要组成部分。针对这方面的要求，进行了燃气轮机进气防浪级的设计及数值模拟计算，为设计制造高性能的船用燃气轮机进气系统提供可靠的依据。对进气防浪级作的数值计算和实验研究，其结果是相当令人满意的，研究方法对燃气轮机进气系统的研究有一定的参考价值和指导意义。     

进气处理质量对燃气轮机的影响

简单介绍了进气系统对燃气轮机的影响,详细分析了进气污染物颗粒对燃气轮机的影响及预防方法,并对进气系统提出具体要求。     

基于余热利用的燃气轮机进气暖风技术研究

提出了基于余热利用的燃气轮机进气暖风系统技术方案,分析了燃气轮机部分负荷下压气机进气温度对燃气轮机热效率的影响,阐述了采用余热利用技术提高联合循环机组经济性的原理,并完成了燃气轮机部分负荷下投/切燃气轮机进气暖风系统的节能量评估和暖风器的优化设计.结果表明:在燃气轮机部分负荷下采用余热利用技术可使压气机进气温度提高7....     

小型燃气轮机发电机空气进气系统的工程改造实例

燃气轮机空气进气系统的主要功能是对空气进行过滤以达到机组使用要求,降低机组运行风险,并控制机组进气噪音和压降在相应的标准范围内。由于海上平台高湿度、高盐度的工作环境和使用年限的增加,某平台3MW燃气轮机发电机组空气进气系统存在空气进气质量差、风道腐蚀穿孔、夏季暴雨和冬春季大雾天气时易湿堵造成异常停机、过滤器更换频繁、维修量大等问题。针对这些问题,对燃气轮机发电机组空气进气系统进行了全面技术分析,并结合当前空气过滤相关的新技术,对燃气轮机空气进气系统进行了改造,采用三级过滤系统改善了空气进气质量。改造方案的成功实施对当前海上平台3~30MW的燃气轮机发电机组空气进气系统运维工作有良好的借鉴意义,该改造方案并已成功在其他平台6MW燃气轮机机组上成功实施。     

压气机进气温度对联合循环机组性能影响的探讨

通过热力学模型分析和热力系统平衡计算,研究了9F级燃气轮机压气机进气温度变化对燃气轮机及联合循环发电机输出功率及效率的影响,压气机进气温度变化不仅对燃气轮机联合循环机组满负荷时的性能有影响,在部分负荷运行时对机组的效率也有影响。通过对压气机进气温度进行调节,可以改善燃气轮机联合循环的运行性能。     

西门子SGT5-4000F型燃气轮机进气系统简介

详细分析了SGT5-4000F型燃气轮机进气系统的结构特点,对各个组成部分的主要功能展开了全面的介绍.本文将对进一步研发、改进大型燃气轮机进气系统起到积极的意义.     

西门子联合循环电厂进气系统调试

进气系统作为燃气轮机发电机组的重要辅助系统,它的运行状况直接影响到机组的效率.本文介绍了西门子燃气轮机联合循环电厂的进气系统的调试,列出了进气系统主要的调试工作与步骤,以及简单实例.     

进气冷却在微型燃气轮机冷、电联供系统中的应用

对进气冷却在微型燃气轮机冷、电联供系统中的应用进行了研究.提出了用联供系统生产的冷能对压气机进口空气进行冷却来改善联供系统在高温天气下性能的方法,并结合具体算例进行了分析.结果表明：进气冷却可使微型燃气轮机在环境温度升高的情况下仍能稳定在设计工况点附近运行;环境温度越高,其对微型燃气轮机性能改善的效果越明显;余热供冷功率会因冷却空气而减少,但用微型燃气轮机比进气冷却前多发的电功率来驱动电空调制冷,可补偿制冷功率损失,并使系统总的供冷功率得到很大提高;进气冷却是高温天气下提高微型燃气轮机冷、电联供系统性能的有效措施.     

燃气轮机进气冷却系统研制

燃气轮机的性能受到环境温度的影响,高温时其出力随进入燃机的空气温度升高而降低的问题可通过进气冷却来解决.提出了一种燃气轮机进气冷却系统的设计方案,介绍了一种双工况燃气轮机进气冷却系统以及使用西门子工控软件WinCC与STEP7对监控系统的设计.运行结果表明,该进气冷却系统具有显著的经济效益.     

Variable geometry gas turbines for improving the part-load performance of marine combined cycles – Gas turbine performance

The part-load performance of gas and steam turbine combined cycles intended for naval use is of great importance, and it is influenced by the gas turbine configuration and load control strategy. This paper is aimed at quantifying the effects of variable geometry on the gas turbine part-load performance. Subsequently, in another paper, the effects of variable geometry on the part-load performance for combined cycles used for ship propulsion will be presented. Moreover, this paper is aimed at developing methodologies and deriving models for part-load simulations suitable for energy system analysis of various components within gas turbines. Two different gas turbine configurations are studied, a two-shaft aero-derivative configuration and a single-shaft industrial configuration. When both gas turbine configurations are running in part-load using fuel flow control, the results indicate better part-load performance for the two-shaft gas turbine. Reducing the load this way is accompanied by a much larger decrease in exhaust gas temperature for the single-shaft gas turbine than for the two-shaft configuration. As used here, the results suggest that variable geometry generally deteriorates the gas turbine part-load performance.     

中低热值中小型燃气轮机选型实例

简述用于燃气轮机的常见中低热值燃料气并列举了对应中小型燃气轮机机型,详细介绍了中低热值中小型燃气轮机及余热利用主机选型方案过程中的基本思路、部分注意事项,并简述一选型应用实例。本文可为潜在用户在中低热值中小型燃气轮机项目前期的主机选型提供参考。     

Operation window and part-load performance study of a syngas fired gas turbine

Integrated coal gasification combined cycle (IGCC) provides a great opportunity for clean utilization of coal while maintaining the advantage of high energy efficiency brought by gas turbines. A challenging problem arising from the integration of an existing gas turbine to an IGCC system is the performance change of the gas turbine due to the shift of fuel from natural gas to synthesis gas, or syngas, mainly consisting of carbon monoxide and hydrogen. Besides the change of base-load performance, which has been extensively studied, the change of part-load performance is also of great significance for the operation of a gas turbine and an IGCC plant.In this paper, a detailed mathematical model of a syngas fired gas turbine is developed to study its part-load performance. A baseline is firstly established using the part-load performance of a natural gas fired gas turbine, then the part-load performance of the gas turbine running with different compositions of syngas is investigated and compared with the baseline. Particularly, the impacts of the variable inlet guide vane, the degree of fuel dilution, and the degree of air bleed are investigated. Results indicate that insufficient cooling of turbine blades and a reduced compressor surge margin are the major factors that constrain the part-load performance of a syngas fired gas turbine. Results also show that air bleed from the compressor can greatly improve the working condition of a syngas fired gas turbine, especially for those fired with low lower heating value syngas. The regulating strategy of a syngas fired gas turbine should also be adjusted in accordance to the changes of part-load performance, and a reduced scope of constant TAT (turbine exhaust temperature) control mode is required.     

Structural modeling of a typical gas turbine system

This paper presents an approach for the structural modeling and analysis of a typical gas turbine system. This approach has been applied to the systems and subsystems, which are integral parts of a typical gas turbine system. Since a gas turbine system performance is measured in terms of fluid flow energy transformations across its various assemblies and subassemblies, the performance of such subsystems affects the overall performance of the gas turbine system. An attempt has been made to correlate the associativity of such subsystems contributing to overall gas turbine system functional evaluation using graph theoretic approach. The characteristic equations at the system level as well as subsystem level have been developed on the basis of associativity of various factors affecting their performance. A permanent function has been proposed for the functional model of a gas turbine system, which further leads to selection, identification and optimal evaluation of gas turbine systems.     

基于BP神经网络的9F燃气轮机压气机离线水洗周期优化

基于BP神经网络,对某9F燃气轮机机组历史运行数据进行了建模与分析,提出了一种燃气轮机压气机叶片积垢导致其性能下降的分析方法,得到了燃气轮机压气机效率、压气机压比、压气机流量、燃气轮机功率四个性能参数偏差值随燃气轮机实际运行小时的变化曲线。结果表明,可将上述四个性能参数的实际运行值与理想状态下的运行值(神经网络预测值)偏差3%、3%、4%、5%作为压气机离线水洗的判据。据此,对9F燃气轮机机组现有的离线水洗周期进行优化,得出当前燃气轮机压气机积垢状态实际运行指导小时数为3 000 h。该方法为燃气轮机离线水洗周期优化提供了一种思路,具有一定的工程应用价值。     

某舰用燃气轮机和试车台架的模态分析

针对某烯气轮机陆上试验,使用大型有限元分析软件ＭＳＣ／ＮＡＳＴＲＡＮ,对燃气轮机系统及燃气轮机和试车台架整个系统的动力特性进行了计算和分析。为试验提供了一些参考数据。     

MS6001燃气轮机特性计算及安全监测评估系统软件实现

以从法国引进的MS6001燃气轮机发电机组为研究对象,开发了1套以燃气轮机循环计算、压气机和涡轮特性计算及燃气轮机变工况计算为基础的工况监控显示系统软件。该软件的开发有利于提高燃气轮机系统运行的管理水平,为全面实施燃气轮机机组的智能监控和诊断打下坚实的基础。图4表1参5     

燃气轮机进气雾化式蒸发冷却控制技术研究

大气环境温度对燃气轮机性能的影响很大,加装燃气轮机进气雾化冷却系统对改善燃气轮机性能具有很高的实用价值.通过对燃气轮机进气雾化冷却工作原理的分析,提出了一种基于PLC的燃气轮机进气雾化冷却控制系统的设计方案以及功能实现.运行结果表明,该控制系统自动化程度高,工作稳定性好,性能可靠.配置控制系统的燃气轮机进气雾化式冷却撬体投运后,PG6551(B)型燃气轮机功率相对增加8.35%,效率相对提高3.24%.     

燃用焦炉煤气的燃气轮机性能分析

将焦炉煤气用于燃气轮机发电,是有效利用焦炉煤气的形式。选用M701F型燃气轮机,对其燃用焦炉煤气的性能进行研究。为了得到更多关于该燃气轮机的性能参数,首先对该燃气轮机燃用天然气的设计工况下的性能参数进行计算,将计算结果输入ASPEN PLUS软件进行模拟,得到与设计值极为吻合结果。根据这些数据,计算M701F型燃气轮机燃用焦炉煤气工况下的燃气轮机性能参数,同样将计算结果输入软件进行模拟,最后得出结果。     

A new approach for enhancing performance of a gas turbine (case study: Khangiran refinery)

There are various methods which are commercially available for turbine air inlet cooling aiming to improve gas turbine efficiency. In this study a new approach has been proposed to improve performance of a gas turbine. The approach has been applied to one of the Khangiran refinery gas turbines. The idea is to cool inlet air of the gas turbine by potential cooling capacity of the refinery natural-gas pressure drop station. The study is part of a comprehensive program aimed to enhance gas turbines performance of the Khangiran gas refinery. The results show that the gas turbine inlet air temperature could be reduced in range of 4–25 K and the performance could be improved in range of 1.5–5% for almost 10 months.