望亭电厂燃气—蒸汽联合循环机组选型探讨

该介绍望亭电厂就选用F级（即200MW级）燃机单轴联合循环机组或E级（即100MW级）燃机“二拖一”多轴联合循环机组,对两种方案的技术性能、系统配置及厂房布置进行探讨。     

燃气轮机透平叶轮表面耐磨涂层国产化研制

刷式汽封对燃气轮机透平叶轮体的长期过量磨损,会造成漏气,严重影响燃机发电效率,所以在燃机叶轮与汽封齿摩擦部位喷涂一层NiCr-Cr3C2耐高温磨损涂层,可显著提高其发电效率,延长其使用寿命。东汽表工所利用大气等离子喷涂（APS）技术制备的NiCr—Cr2C3涂层的孔隙率、界面污染率、涂层硬度、涂层结合强度、杯突性能等均满足使用要求该项技术与业内国际知名企业水平相当,并成功应用于F级重型燃机透平叶轮上,从而进一步推进了我国重型燃机国产化进程     

大型天然气发电工程主机选用及配置

介绍了浙江半山天然气发电工程采用三套350MW级燃气—蒸汽联合循环发电机组，每套机组有四大主机：燃气轮机(GT)、余热锅炉(HRSG)、汽轮机(ST)及发电机(G)。由于气价较高，确定采用F级燃机及相应的余热锅铲与汽轮机；对主机配置进行比选，确定每套机组由一台F级燃机、一台余热锅铲、一台汽轮机组成单轴系统(燃机、汽轮机与发电机同轴)。     

部分负荷进气加热提效技术在F级燃机的应用研究

简要介绍我国燃气发电行业的机组运行现状,分析燃气轮机进气加热提效技术应用的背景。采用仿真计算研究方式,针对不同F级燃气轮机联合循环机组建立仿真分析模型,研究我国不同型号F级燃机部分负荷加热性能提升情况。仿真计算结果表明,进气加热技术能够显著提高M701F4和PG9351FA燃气联合循环机组部分负荷下的发电效率。最后国内典型进气系统结构形式的进气加热技术改造难点进行了分析,提出具有实践意义的改造建议。     

航改燃机的专家PID控制仿真研究

航改燃机是非常复杂的控制对象。当前航改燃机应用领域逐步扩展,航改燃机通常采用串级控制方案。但当燃机用于船舶动力、工业发电等领域时,由于负载扰动大,采用常规的串级控制难以获得理想的控制效果。在串级控制基础上,通过引入专家PID控制方法,对燃机在大负载扰动条件下进行了性能仿真分析。2种控制方法的仿真对比结果表明:专家PID控制比串级控制具有更好的性能指标,为后续整个燃机系统的动态响应试验提供了参考与指导意义。     

H级燃机在燃气-蒸汽联合循环供热机组中的选型研究

根据本课题的特点,在满足热负荷需求、电负荷受限制的条件下,通过对比H级、F级、E级三种主流型号燃机,对燃气-蒸汽联合循环的装机方案进行技术经济性比较,提出了合理的装机方案.     

阿尔斯通燃机业务完成交割,或助力国产H级燃机研发

正根据2016年2月27日两机动力控制报道,2016年2月26日,通用电气(GE)宣布,完成阿尔斯通发电资产剥离,将重型燃气轮机相关资产,包括最新的阿尔斯通H级燃机GT36技术在内的相关资产,交割给安萨尔多能源公司。考虑到我国上海电气与安萨尔多的股东关系,或将助力我国国产H级燃机研发。     

微型燃机与燃料电池复合装置的应用

对微型燃机发电装置及与燃料电池复合装置作了简介,并比较了采用顶层循环的固体氧化物燃料电池-微型燃机复合发电装置与单独微型燃机发电装置各自的循环特点,以燃机功率为50kW的微型燃机及其复合发电装置为例,进行了两者的性能分析比较：在复合发电装置中,分析了余热利用的优越性,并对余热供热进行了计算分析.     

联合循环热力系统优化研究

基于某F级燃机组成的燃气-蒸汽联合循环热力系统,分析了三压再热汽轮机各段主蒸汽压力对联合循环性能的影响,找到配合该F级燃气轮机的最优的各段主蒸汽压力,为联合循环汽轮机的优化设计提供参考.     

国内燃机电厂F6B燃机的危机和出路

由于单机功率小，能耗高等诸多不利因素，使得国内燃机电厂F6B燃气轮发电机组不可避免的面临着逐步关停的境地。全国各地尤其是在燃机发电较为集中的华南、华东地区，各型F6B燃机都退出了正常的上网发电序列。文中就盘活和利用好这些闲置设备，解决好由于机组停运而带来的人员流向等问题，提出了建议，但仍有许多实际的问题还需进一步摸索解决。     

大型燃机集约化布置研究

通过对一H级大型燃机电厂主要功能区的用地分析,结合相关规范和工程实例,分析出了影响厂区占地的五大因素,总结出了可集约化联合布置的五大区域和6个联合建筑实例,并提出了3个减小建(构)筑物间距突破口及5个紧凑集约化布置实例。通过一系列优化措施,该9H级燃机工程围墙内占地仅9.25 hm^2,比同等条件下2台9F级燃机用地节约1.18 hm^2。这为后续燃机电厂的用地集约化设计提供了借鉴方案。     

Thermal performance prediction of a solar hybrid gas turbine

The present work focuses on a modelling procedure to simulate the operation of a solar hybrid gas turbine. The method is applied to a power generation system including an heliostat field, a receiver and a 36 MW commercial gas turbine. Heat is provided by concentrated solar power and integrated by fossil fuel. A detailed modelling of the gas turbine (GT) is proposed to predict the performance of commercial GT models in actual operating conditions. Advanced software tools were combined together to predict design and off-design performance of the whole system: TRNSYS® was used to model the solar field and the receiver while the gas turbine simulation was performed by means of Thermoflex®. A detailed comparison between the solarized and the conventional gas turbine is reported, taking into account GT electric power, efficiency and shaft speed. All thermodynamic parameters such pressure ratio, air flow and fuel consumption were compared. The main advantage of solarization is the fossil fuel saving, but it is balanced by a relevant penalty in power output and efficiency.     

具有空气冷却的简单循环燃气轮机热力学建模和性能优化:(I)建模

研究了考虑空气冷却和实际气体性质的简单循环三轴燃气轮机热力学性能,给出了循环功率和效率的计算流程,并利用UGT25000型工业燃气轮机的设计性能数据对模型进行了验证计算。结果表明,所建模型是准确的,能有效地反映燃气轮机循环的设计性能。     

Performance characteristics of a MW-class SOFC/GT hybrid system based on a commercially available gas turbine

The ultimate purpose of a SOFC/GT hybrid system is for distributed power generation applications. Therefore, this study investigates the possible extension of a SOFC/GT hybrid system to multi-MW power cases. Because of the matured technology of gas turbines and their commercial availability, it was reasonable to construct a hybrid system with an off-the-shelf gas turbine. Based on a commercially available gas turbine, performance analysis was conducted to find the total appropriate power for the hybrid system with consideration of the maximum allowable cell temperature. In order to maintain high performance characteristics of the hybrid system during part-load operations, it was necessary to find the optimal control strategy for the system according to the change in power required. The results of the performance analysis for part-load conditions showed that supplied fuel and air must be changed simultaneously. Furthermore, in order to prevent performance degradation, it was found that both cell temperature and turbine inlet temperature must be maintained as close as possible to design-point conditions.     

Thermo-economic modeling of a solid oxide fuel cell/gas turbine power plant with semi-direct coupling and anode recycling

Power generation using gas turbine (GT) power plants operating on the Brayton cycle suffers from low efficiencies, resulting in poor fuel to power conversion. A solid oxide fuel cell (SOFC) is proposed for integration into a 10 MW gas turbine power plant, operating at 30% efficiency in order to improve system efficiencies and economics. The SOFC system is semi-directly coupled to the gas turbine power plant, with careful attention paid to minimize the disruption to the GT operation. A thermo-economic model is developed for the hybrid power plant, and predicts an optimized power output of 21.6 MW at 49.2% efficiency. The model also predicts a breakeven per-unit energy cost of USD 4.70 ¢/kWh for the hybrid system based on futuristic mass generation SOFC costs. Results show that SOFCs can be semi-directly integrated into existing GT power systems to improve their thermodynamic and economic performance.     

Dynamic simulation of air storage–based gas turbine plants

Cavern storage is a proven energy storage technology, capable of storing energy in the form of compressed air inside a cavern. The Huntorf plant and the Alabama plants use this technology to store electrical energy during the off‐peak load hours by compressing the air inside a cavern and then using this compressed air during gas turbine operation to generate electricity during peak load demand hours. The advantage of doing this is that it increases the efficiency of gas turbine operation while meeting the grid generation and the load balance. The operation of a typical compressed air energy storage (CAES)–based gas turbine plant involves the operation of several components, including the compressor, the cavern storage, the combustor, the turbine, and so on. The dynamics of the plant as a whole depends on the performance of the individual components. The focus of this article is to develop a Simulink‐based models for each of the individual components, which can then be assembled appropriately to design an entire CAES plant. As an illustration, a case study for the Huntorf CAES plant is presented with the developed models. A typical daily operation of the Huntorf plant is simulated and compared with the reported Huntorf plant data. The model accurately captures the reported dynamics of the cavern storage. In addition, the reported quantities like the compressor power consumption, the turbine power generation, and the temperature at different junctions of the CAES plant match well with the simulated results. Copyright © 2011 John Wiley & Sons, Ltd.     

Thermo-economic modeling of an indirectly coupled solid oxide fuel cell/gas turbine hybrid power plant

Power generation using gas turbine (GT) power plants operating on the Brayton cycle suffers from low efficiencies, resulting in poor fuel to power conversion. A solid oxide fuel cell (SOFC) is proposed for integration into a 10 MW gas turbine power plant, operating at 30% efficiency, in order to improve system efficiencies and economics. The SOFC system is indirectly coupled to the gas turbine power plant, paying careful attention to minimize the disruption to the GT operation. A thermo-economic model is developed for the hybrid power plant, and predicts an optimized power output of 20.6 MW at 49.9% efficiency. The model also predicts a break-even per-unit energy cost of USD 4.65 ¢ kWh⁻¹ for the hybrid system based on futuristic mass generation SOFC costs. This shows that SOFCs may be indirectly integrated into existing GT power systems to improve their thermodynamic and economic performance.     

Novel and optimal integration of SOFC-ICGT hybrid cycle: Energy analysis and entropy generation minimization

Integrating fuel cells with conventional gas turbine based power plant yields higher efficiency, especially solid oxide fuel cell (SOFC) with gas turbine (GT). SOFCs are energy efficient devices, performance of which are not limited to Carnot efficiency and considered as most promising candidate for thermal integration with Brayton cycle. In this paper, a novel and optimal thermal integration of SOFC with intercooled-recuperated gas turbine has been presented. A thermodynamic model of a proposed hybrid cycle has been detailed along with a novelty of adoption of blade cooled gas turbine model. On the basis of 1st and 2nd law of thermodynamics, parametric analysis has been carried out, in which impact of turbine inlet temperature and compression ratio has been observed on various output parameters such as hybrid efficiency, hybrid plant specific work, mass of blade coolant requirement and entropy generation rate. For optimizing the system performance, entropy minimization has been carried out, for which a constraint based algorithm has been developed. The result shows that entropy generation of a proposed hybrid cycle first increases and then decreases, as the turbine inlet temperature of the cycle increases. Furthermore, a unique performance map has also been plotted for proposed hybrid cycle, which can be utilized by power plant designer. An optimal efficiency of 74.13% can be achieved at TIT of 1800 K and r_p,c 20.