无旁通烟囱燃气--蒸汽联合循环机组的启动

１引言通常燃气———蒸汽联合循环都设有旁通烟囱,可使机组运行灵活方便,对余热锅炉起到保护作用,然而为了减少设备的初始投资,现在有的联合循环不设置旁通烟囱见图１。这类机组的启动运行不同于有旁通烟囱的联合循环,有其自身的特点。２无旁通烟囱联合循环机组启动...     

燃气--蒸汽联合循环无旁通烟囱的分析

分析无旁通烟囱燃气－－蒸汽联合循环的特点,指出燃机启动会对余热锅炉产生热冲击,提出根据机组的实际运行情况来确定是否设置旁通烟囱,可供联合循环方案设计者及运行人员参考。     

燃气-蒸汽联合循环不设置旁通烟囱的分析

分析无旁通烟囱燃气—蒸汽联合循环的特点，指出燃机启动会对余热锅炉产生热冲击，提出根据机组的实际运行情况来确定是否设置旁通烟囱，可供联合循环方案设计者及运行人员参考。     

联合循环机组维护成本建模及求解

为更加准确合理计算联合循环机组发电成本,在传统联合循环机组组合模型基础上,引入联合循环机组维护成本模型,该模型的难点是启机维护成本和运行维护成本在同一计算周期内的互斥关系。针对这一难点,首先将启机维护成本叠加到模式转移成本中考虑,然后通过分析联合循环机组中燃气轮机在计算周期内是否有启机,确定目标发电成本是否考虑运行维护成本,同时使用线性化技巧等价变换非线性表达为线性表达,建立MIP模型。利用系统实际运行数据对文中模型进行测试,测试表明该模型有效解决联合循环机组维护成本问题,优化结果合理。 关键词： 联合循环机组;混合整数线性规划;启机维护成本;运行维护成本;模式转移     

标准联合循环装置的价格

标准联合循环装置的价格“ＧａｓＴｕｒｂｉｎｅＷｏｒｌｄ１９９６Ｈａｎｄｂｏｏｋ”报导了标准联合循环装置的价格。该价格是指基本的烧天然气的联合循环动力装置平均的标准预算价格，以１９９６年美元计算，包括下列设备的购置费用：燃气轮发电机组，没有旁通烟囱不补...     

联合循环电厂汽轮机供热运行的若干问题

国内某联合循环电厂由于汽轮机缺乏非设计工况下抽汽供热运行经验且需要参与电网调峰,经过对联合循环机组特性分析和现场运行数据的整理、优化,在保证机组安全的前提下,确定了汽轮机供热量和机组调峰能力,为指导运行人员操作和确定机组电网调峰能力提供了依据。     

9FA燃气蒸汽联合循环发电机组热工控制系统的改进

该文主要介绍了GE公司的S109FA联合循环发电机组运行实践中热工控制系统中曾出现的危险点和潜在的危险点,通过不断的技术分析,进行彻底的设备改造或逻辑修改,从根本上提高了机组的安全可靠性,或许对从事燃机热工维护的人员来说有可鉴之处。     

2+1型多轴布置联合循环机组优化运行临界点的研究

对于2 1型多轴布置联合循环机组优化运行准则和临界点的确定提出了一个新方法。结合联合循环机组各部件的特点，建立了基于联合循环机组运行特性的数学模型。在分析了不同环境条件下对机组运行状态的影响之后，根据机组运行经济性要求，确定联合循环机组优化运行准则及临界点。与以往临界点确定的方式相比，新方法更加有效实用。     

标准小型联合循环装置的价格

“Gas Turbine World”1996年5~6月号报道了标准小型联合循环装置的价格,该价格是指平均的烧天然气的联合循环基本装置的价格,以1996年美元计算,包括下列没备的购置费用:燃气轮发电机组,无旁通烟囱不补燃的多压余热锅炉,凝汽式多压汽轮发电机组,升压变压器、水冷式排热系统,标准的控制装置,起动系统和装置的辅机,并且通常装有干低NO_x燃气轮机。     

YD5.78烟气挡板门的设计与探讨

YD系列烟气挡板门是燃气轮机余热锅炉必不可少的部件，它在整个烟气系统里起了三通转换阀的作用：关闭锅炉侧进口，燃机排气直接进入旁路烟囱，排入大气，系统单循环发电；关闭旁通侧进口，燃机排气进入余热锅炉，实现余热再利用，系统联合循环发电。     

Numerical based design of exhaust gas system in a cogeneration power plant

Among the various aspects that have to be analysed in a cogeneration and combined cycle plant design, the exhaust gas stack design can represent a critical aspect, in particular when a by-pass stack, which allows the modulation of heat-to-power generation, is present, since it may influence the entire system working condition. To properly take into account the large number of the different requirements which enter in an exhaust gas system design, a multidisciplinary analysis involving numerical integrated approaches can be adopted in order to obtain an optimally designed stack system. In this paper, the design of the exhaust gas system in a cogeneration plant is analysed. The design is performed numerically through a three-dimensional integrated numerical code. Different design solutions are simulated and the results discussed in detail.     

联合循环电厂主蒸汽管道稳压吹管方法

介绍了电厂安装调试阶段中吹管的目的、吹管的原理和吹管合格的判定条件,简明介绍了电厂中常用的降压吹管方法和稳压吹管的方法;集中讨论了联合循环电厂及稳压吹管的特点,指出联合循环电厂中更适宜采用稳压吹管方法,同时给出了稳压吹管在实际工程中的应用实例。     

火力发电厂效率计算及联合循环发电的优势

论述了火力发电厂的效率计算。数据表明,采用燃气－蒸汽联合循环发电技术的温州燃机电厂效率高,并对此作了经济指标对比。     

KA_13D燃气轮机注水系统应用

结合电厂几年运行经验,分析了在联合循环运行时向燃气轮机燃烧室注水及不注水情况下对燃烧室热部件耐热瓦及后循环的影响,阐述在联合循环运行时向燃气轮机燃烧室注水及不注水情况下优缺点。     

燃气轮机在热电联产工程中的应用状况分析

燃气轮机是21世纪乃至更长时间内能源高效转换与洁净利用系统的核心动力装备.介绍了燃气轮机的发展现状及其在热电联产工程中的应用,简述了联合循环和简单循环燃气轮机电厂的基本组合方式,并列举了目前应用在热电联产工程中的几种主要的燃气轮机.阐述了燃气轮机相对于常规火电机组的优点,分析了影响燃气轮机在热电联产工程中推广的因素,并对我国燃气轮机的发展前景进行了展望.     

联合循环电厂成本的热经济学分析

天然气联合循环的发电成本一是制约其发展的关键因素之一。针对天然气联合循环电站的具体实例，应用热经济学方法，分析计算了不同天然气价格条件下的发电燃料成本状态，为投资者或决策者提供参考，并对成本分析方法进行了尝试。     

Performance Improvement of Combined Cycle Power Plant Based on the Optimization of the Bottom Cycle and Heat Recuperation

Many F class gas turbine combined cycle(GTCC)power plants are built in China at present because of less emis-sion and high efficiency.It is of great interest to investigate the efficiency improvement of GTCC plant.A com-bined cycle with three-pressure reheat heat recovery steam generator(HRSG)is selected for study in this paper.In order to maximize the GTCC efficiency,the optimization of the HRSG operating parameters is performed.Theoperating parameters are determined by means of a thermodynamic analysis,i.e.the minimization of exergylosses.The influence of HRSG inlet gas temperature on the steam bottoming cycle efficiency is discussed.Theresult shows that increasing the HRSG inlet temperature has less improvement to steam cycle efficiency when itis over 590℃.Partial gas to gas recuperation in the topping cycle is studied.Joining HRSG optimization with theuse of gas to gas heat recuperation,the combined plant efficiency can rise up to 59.05% at base load.In addition,the part load performance of the GTCC power plant gets much better.The efficiency is increased by 2.11% at75% load and by 4.17% at 50% load.     

依托高楼的太阳能热气流电站系统的CFD模拟

设计了一种依托高楼的太阳能热气流电站,建立了相应的数学模型。利用Fluent软件对该系统的流场及温度场进行了数值模拟,并对电站结构进行了优化设计。模拟结果表明:随着烟囱高度的增加,烟囱内气流的温度不断上升,在出口处由于回流的影响温度稍有下降,气流速度不断增大,气流的压力分布先减小后增加。由于平板集热器的加热作用使烟囱内气流的温度分布不均匀,设计中可将平板型储热器换为带有肋片扩展表面的储热器,并对烟囱与扩压管联接处采用流线形联接进行过渡,以减少此处的流动阻力。同时,设计一个收缩型的烟囱出口,以保证电站系统产生较大的抽力,从而提高电站系统的能量转换率。     

Energetic and exergetic analysis of a hybrid combined‐nuclear power plant

Combined‐cycle power plants are currently preferred for new power generation plants worldwide. The performance of gas‐turbine engines can be enhanced at constant turbine inlet temperatures with the addition of a bottoming waste‐heat recovery cycle. This paper presents a study on the energy and exergy analysis of a novel hybrid Combined‐Nuclear Power Plant (HCNPP). It is thus interesting to evaluate the possibility of integrating the gas turbine with nuclear power plant of such a system, utilizing virtually free heat. The integration arrangement of the AP600 NPP steam cycle with gas turbines from basic thermodynamic considerations will be described. The AP600 steam cycle modifications to combine with the gas turbines can be applied to other types of NPP. A simple modeling of Alstom gas turbines cycle, one of the major combined‐cycle steam turbines manufacturers, hybridized with a nuclear power plant from energetic and exergetic viewpoint is provided. The Heat Recovery Steam Generator (HRSG) has single steam pressure without reheat, one superheater and one economizer. The thermodynamic parameters of the working fluids of both the gas and the steam turbines cycles are analyzed by modeling the thermodynamic cycle using the Engineering Equation Solver (EES) software. In case of hybridizing, the existing Alstom gas turbine with a pressurized water nuclear power plants using the newly proposed novel solution, we can increase the electricity output and efficiency significantly. If we convert a traditional combined cycle to HCNPP unit, we can achieve about 20% increase in electricity output. This figure emphasizes the significance of restructuring our power plant technology and exploring a wider variety of HCNPP solutions. Copyright © 2011 John Wiley & Sons, Ltd.