Optimization and Innovation of Engineering Design for Ninghai Power Plant

In order to build a power plant with high efficiency,low investment and zero warm water discharge,a series of innovations are applied to the two 1 000-MW units of Ninghai Power Plant.The new technologies include the closed-circuit system for seawater cooling tower with a spraying area of 13 000 m2,the main buildings with reinforced concrete structure,the plasma ignition system for tower boiler and the fieldbus control system.Optimization measures are taken in some aspects,such as the open point of the turbine overload valves,the boiler dimensions,the technical process,the electric system,the building structures and the layout of the power plant.The units have been running for more than half a year with the thermal efficiency as high as 45.79% and without warm water discharged,which indicates that all the systems are safe and steady and the original purpose of optimization has been realized.

Study on Site Specific Design Earthquake Ground Motion of Nuclear Power Plants in China

The main technical backgrounds and requirements are introduced with regard to earthquake ground motion design parameters in several domestic and American standards,codes and guides involved in the seismic analysis and design activities of nuclear power plants in China.Based on the research results from site seismic safety evaluation of domestic nuclear power plant projects in the last years,characteristics and differences of site specific design spectra are analyzed in comparison with standard response spectra,and the suitability of standard response spectra for domestic nuclear power plant projects is discussed.

Preliminary design for inland nuclear power plants completed

The State Nuclear Power Technology Corporation (SNPTC), which is responsible for the development of third-generation nuclear power technology in China, has completed the preliminary designs

Design and Construction of the Power Plant Multi-flue Chimneys in East China Area

This paper mainly introduces the designand construction of the multi-flue chimneysof Beilungang Power Plant, ShidongkouSecond Power Plant and Waigaoqiao PowerPlant which have been used in East Chinaarea. This paper contains the generalsituation of construction, material selection,lifting scheme of steel inner flue, designfeatures and construction method. It could bereferential to concerned design andconstruction companies.

Design of Steam Turbine for Electric Power Production Using Heat Energy from Palm Kernel Shell

The steam turbine is a prime mover that converts kinetic energy in steam into rotational mechanical energy through the impact or reaction of the steam against the blades. The aim of this study is to design a steam turbine for a small scale steam power plant with target of producing electricity. The turbine is driven by the heat energy from palm kernel shells as a renewable energy source obtained at a lower or no cost. The study was concentrated on design of turbine elements and its validation using computer packages. Specifically, the microturbine design was limited to design, modeling, simulation and analysis of the rotor, blades and nozzle under the palm kernel shell as fuel for the micro power plant. In blade design, stress failures, efficiency and blade angle parameters were considered. In casing volume design, the overall heat transfer and mean temperature, and different concepts were applied. The thermal distribution on stator and rotor was considered in order to determine its level of tolerance. The design software packages used for design validation were Solidworks and Comsol Multiphysics for analysis. Simulation results showed that the designed steam turbine can adequately tolerate change in stress/load, torsion/compression, temperature and speeds.

The CAD System Development for Power Plants Pipe-Prefabrication

An intelligent design software system for the power station pipe-prefabrication (PPDS) has been developed in the paper,which is taking pipe material database as core and developed on the platform of AutoCAD and Borland C++. Whereas design and construction of power plants in China belong to different deportments,the input and recognition problem of pipeline system disposition chart must be solved firstly for the prefabrication design.Based on AI technology,the model fast building subsystem (MFBS) was established for entering the 3-D pipeline graph data,so that the problems of reconstruction of pipeline digital model and computer identification of original 2-D design data can be solved. The optimization design scheme in the pipe-prefabrication process has been studied and also the corresponding algorithm put forward.The technique and system mentioned can effectively raise the pipe-prefabrication design quality and efficiency in the con- struction of large scale power plants,reduce the period of design and the waste of raw material.PPCADS has still offered the functions such as the construction design for pipeline prefabricated process,the detailing drawing for manufacturing pipe section and automatic generating the technical files for the completed project.

Research on the attribution evaluating methods of dynamic effects of various parameter uncertainties on the in-structure floor response spectra of nuclear power plant

Consideration of the dynamic effects of the site and structural parameter uncertainty is required by the standards for nuclear power plants （NPPs） in most countries. The anti-seismic standards provide two basic methods to analyze parameter uncertainty. Directly manually dealing with the calculated floor response spectra （FRS） values of deterministic approaches is the first method. The second method is to perform probability statistical analysis of the FRS results on the basis of the Monte Carlo method. The two methods can only reflect the overall effects of the uncertain parameters, and the results cannot be screened for a certain parameter＇s influence and contribution. In this study, based on the dynamic analyses of the floor response spectra of NPPs, a comprehensive index of the assessed impact for various uncertain parameters is presented and recommended, including the correlation coefficient, the regression slope coefficient and Tornado swing. To compensate for the lack of guidance in the NPP seismic standards, the proposed method can effectively be used to evaluate the contributions of various parameters from the aspects ＆sensitivity, acuity and statistical swing correlations. Finally, examples are provided to verify the set of indicators from systematic and intuitive perspectives, such as the uncertainty of the impact of the structure parameters and the contribution to the FRS of NPPs. The index is sensitive to different types of parameters, which provides a new technique for evaluating the anti-seismic parameters required for NPPs.

Thermo-Dynamical Analysis on Electricity-Generation Subsystem of CAES Power Plant

Besides pumped hydropower, Compressed Air Energy Storage (CAES) is the other solution for large energy storage capacity. It can balance fluctuations in supply and demand of electricity. CAES is essential part of smart power grids. Linked with the flow structure and dynamic characteristic of electricity generation subsystem and its components, a simulation model is proposed. Thermo-dynamical performance on off-design conditions have been analyzed with constant air mass flux and constant gas combustion temperature. Some simulation diagrams of curve are plotted too. The contrast of varied operation mode thermal performance is made between CAES power plant and simple gas turbine power plant.

面向综合能源协调的虚拟电厂调控平台设计与规划优化

为解决综合能源协调调度难题,文章提出了基于虚拟电厂调控平台设计和综合能源协调调度模型。通过分析虚拟电厂的基本网架结构,设计了虚拟电厂总体架构,分为资源层、平台层和应用层,并设计了网络架构和数据流架构。基于该架构建立了面向综合能源协调的虚拟电厂调度应用模型。针对模型内光伏、风力发电、电解器、燃料电池、氢气储能、电池储能,以可靠性指标作为切入点,提出了全生命周期内成本最小的目标函数。通过算例分析,验证了文章所提出的模型在可靠性和成本方面的优势。

模拟事故工况下非能动核电厂安全相关涂层的可靠性测试及评估方法研究

安全相关涂层在非能动核电厂中起着重要的作用,涂层的失效会影响核电厂安全系统的功能执行,影响核安全。国内外核监管机构对于在设计基准事故(DBA)工况下涂层系统的可靠性及评估方法非常重视。文章结合非能动核电厂涂层系统的工程应用,针对其在DBA下的可靠性及评估方法进行了研究。研究表明:在DBA下非能动核电厂安全相关涂层的可靠性要综合考虑涂层的模拟DBA性能、干膜密度、导热性能等。而非能动核电厂安全相关涂层工程应用,则需从涂层的模拟DBA性能、干膜密度、导热性能、涂层碎片(数量、大小、位置和性能等)以及包络涂层碎片后的碎片裕量等角度进行综合评估,以确定在事故工况下涂层的可靠性,不对系统安全产生影响,保证核电厂更安全、高效和经济性运行。

核电全厂通信系统设备采购管理浅析

核电站全厂通信系统具有种类繁多、数量多、覆盖全厂等特点。目前,通信设备采购在设计、采购、安装单位管理3个方面均存在较多问题,此类问题制约工程进展。针对上述问题,论文从设计、采购、安装管理3个方面提出了工作对策,旨在提高采购工作效率,保证设备按时到货,保障现场安装进度。

多能互补条件下水轮机转轮改造深化设计研究

为适应新型电力系统的多能互补需求,本文以李家峡水电站水轮机适用多能互补改造为研究对象,对多能互补系统中的常规水电站机组进行了深化设计研究,提出了水轮机改造深化设计理念,阐明了多能互补系统要求下机组的运行加权因子计算方法,并提出了机组改造深化设计的水力设计目标,为水轮机改造的深化设计提供了方向指导。根据水轮机改造深化设计后的水力模型试验表明:深化设计后的水轮机比前期改造的水轮机(未经过深化设计)在空化、压力脉动和叶片应力水平相当的情况下,有更高的水力模型额定效率和加权平均效率。深化设计后的水轮机不仅满足新型电力系统对水电站电能负荷调节能力的要求,而且机组的水力性能也得到了明显提升,可为类似水电站的水轮机改造设计提供借鉴。

触媒理论背景下工业遗存改造设计研究——以深圳华侨城华中电厂为例

文章基于城市“触媒”理论提出城市工业遗存建筑微更新与活化再利用的设计策略,通过对触媒理论概念阐述,把功能要素、文化要素、生态要素、交通要素作为触媒因子,构建以触媒理论有效介入工业遗存空间改造更新的设计方法,并以华侨城华中电厂为例,寻找触媒载体与旧工业遗存建筑的契合点,通过背景分析、现存问题、改造方法设计、场地改造后现状分析,充分发挥触媒理论的可行性,激发片区发展,实现积极的“触媒反应”。期望对旧工业建筑遗存改造再利用提供新的理论研究视角。

基于BIM的大型光伏电站阵列区电缆敷设设计优化研究与应用

针对大型光伏电站阵列区电缆敷设的施工成本较高的问题,论文通过分析大型光伏电站阵列区电缆敷设的施工技术及面临的问题,提出将建筑信息模型引入大型光伏电站阵列区电缆敷设的设计与施工过程,降低了光伏电站阵列区电缆敷设的成本。

核电仪控系统结构产品模块化设计方法研究

核电仪控系统使用的结构产品要求性能稳定可靠,根据历年数十台机组项目实践,笔者提出了适用于核电仪控系统结构产品模块化设计的方法。较之传统设计方法,模块化设计方法重新定义结构产品设计过程,该设计过程是一个已被反复验证的、可靠的模块化结构进行产品搭建的过程,设计过程中产品在固有的、稳定可靠的模块构成基础上不断迭代优化,使产品性能趋于稳定可靠。使用该方法设计完成的产品在生产制造阶段,会引导供应商从定制加工转向类同化、批量化结构重复加工过程,改变了供应商的制造习惯。本文基于智能制造技术发展趋势,结合相关的法规标准,为解决传统设计方法的缺陷,提出该模块化设计方法。该研究结果为后续核电仪控系统结构产品设计开发提供了技术参考。

生物质机组低真空循环水供热系统设计

阐述了低真空循环水供热的基本原理,并结合某生物质发电机组项目设计,对低真空供热的设计进行了分析,指出系统在设计应用和运行管理等方面的注意事项。采用低真空供热能够提高全厂热效率,充分利用能源,同时增加企业经济效益。