复合式空气干燥器在压缩空气后处理中的成功应用

文中简单介绍了复合式空气干燥器的特点和在压缩空气后处理中的使用情况,并证明使用了该干燥器后,保证了净化风的质量,从而确保了全厂装置的安全用风,有效降低了能耗,取得了显著的经济效益,同时也提出了以后改进发展的方向。     

棉纺行业设备节能探讨

<正> 近几年来,节能工作在棉纺行业已引起了足够的重视,通过认真宣传和贯彻国务院《节约能源管理暂行条例》,提高了广大干部职工的节能意识。相继成立了专职节能机构,建立了能源管理制度,狠抓了节能基础管理工作,加强了能源统计,实行了定额考核,开展了企     

750 kV两站两线科研项目管理

针对兰州超高压输变电公司科研项目管理模式进行了研究与分析,提出了科研项目分解的方案,通过本方案明确了基本课题,可以较为全面、系统指导科研工作的开展,增强了科研项目实施的可操作性。构建了矩阵式科研项目管理组织结构,优化配置了公司各科研资源,明确了科研项目的各主要责任主体。确立了科研项目管理流程,做到闭环控制,加强了科研项目过程管理。     

活塞支撑杆测量仪的设计

活塞支撑杆测量仪的设计及应用,代替了传统的测量法,实现了不同种类大批量支撑杆快速测量,降低了工人的劳动强度,提高了测量的准确性及活塞盐芯的位置精度,减少了测量时间,提高了生产效率。     

实施PDM系统为企业带来的价值

阐述了PDM系统的功能,现代企业利用该系统对数据进行分类管理,缩短了新产品开发周期,降低了产品成本,提高了企业的管理能力,促进了企业的发展.     

有限元弹性动力分析与优化在某气门机构中的应用

对某发动机气门机构建立了混合刚体-弹性体的参数化非线性有限元模型,进行了弹性动力学计算。通过回归方程对模型进行了优化,降低了摇臂的质量,在保证摇臂强度的同时改善了凸轮-滚子的接触性能,从而降低了磨损,提高了耐久性。     

棉纺行业设备节能探讨

近几年来,节能工作在棉纺行业,已引起了足够的重视。通过认真宣传和贯彻国务院《节能条例》,提高了广大干部职工的节能意识,建立了专职节能机构,健全了能源管理制度,加强了节能基础管理工作,实行定额考核目标管理,开展了企业能量平衡工作,以及实行了不同形式的用能承包经济责任制,均取得了显著的节能效果。因此,摆在棉纺企业面前的重要任务是如何将企业的     

气缸套铸模结构对铸造缺陷的影响

本文介绍了以前气缸套铸模结构的一些特点 ,指出了铸模结构影响缸套质量的不合理设计 ;提出了模具设计的新思路 ,并在应用中明显减少了铸造缺陷 ,提高了铸造合格率 ,产生了显著的经济效益。     

水轮发电机组电气制动的应用实践

大唐石泉水电厂水轮发电机组采用电气制动停机系统,缩短了停机时间,大大改善了机组的停机工况,消除了机械制动时,制动块与制动环因摩擦而引起的机械疲劳,同时洁净了环境,提高了机组控制的自动化水平,为电站"少人值班,无人值守"的发展提供了可能,同时提高了发电机的安全运行水平.     

300MW煤粉煤气混烧发电锅炉的节能研究

某钢铁公司发电厂通过建设300MW的煤粉煤气混烧发电机组,充分利用钢铁厂生产过程中产生的大量富裕高炉煤气和焦炉煤气,进行煤、气混烧发电,基本杜绝了高炉煤气的放散,有效利用了低热值的二次能源,而且保证了发电负荷的稳定,为企业提供了供电保证,达到了节能、减排、保障供电的目标,实现了钢铁工业和发电行业的有机结合,践行了循环经济理念,取得了良好的经济效益和环保效益。     

PFBC_CC燃气轮机系统动态特性实时混合仿真研究

对用两台数字计算机和一台模拟计算机构成的数模实时混合仿真与控制研究系统作了介绍,讨论了其实现原理和接口软件的流程结构,并利用所建立的实时混合仿真系统对燃煤增压流化床燃气蒸汽联合循环（ＰＦＢＣ－ＣＣ）燃气轮机系统动态特性作出仿真研究,表明系统使用方例,实时性好。     

船用核汽轮机装置仿真研究

建立了适合船用核汽轮机装置实时仿真分析计算的两相流仿真模型。利用该仿真模型对快速变负荷工况下船用核汽轮机装置的动态特性进行了计算分析。结果表明,该模型能准确模拟核汽轮机装置的变负荷运行特性,满足核动力二回路系统实时仿真分析要求。模型已经成功应用于两型船用核动力训练模拟器的开发,对操纵人员的培训及操作规程的验证具有重要意义。     

Steam temperature stability in a direct steam generation solar power plant

Direct steam generation (DSG) is one alternative to the current oil-based parabolic trough solar thermal power plants. Within the German research project ITES, the dynamic behavior of a DSG collector field and the interactions with the conventional power block are assessed in detail. A transient solar field model developed by DLR is used to simulate the steam temperature behavior. Artificial irradiance disturbances as well as real irradiance data are used as input to the system. The resulting main steam temperature gradients are then analyzed by Siemens considering the standards for steam turbines.This paper presents the transient simulation results of the steam temperature as well as the corresponding results of the steam turbine analysis. It is found that the occurring temperature gradients are challenging for a safe turbine operation, if a conservative control system is used. Therefore, the use of an additional thermal inertia to stabilize the steam temperature is suggested. Its impact is also analyzed and discussed in this paper.     

汽轮机循环水系统的稳态仿真数学建模

汽轮机循环水系统是一个冷水与高温水蒸气的热交换系统,其水温与水压的机理数学模型十分复杂,不适用于计算机实时仿真系统。作者利用电厂实测数据,通过一种超曲面拟合的方法,建立了该系统水温与水压的仿真数学模型,该模型计算量较小。仿真结果验证了这种拟合建模方法具有较高的精确度。     

基于3KEYMASTER软件的核电站汽轮机数学模型与仿真

以福建宁德1000 MW核电机组汽轮机为研究对象,经过系统划分和对具体物理设备进行合理简化和假设后,建立了汽轮机组的动态数学模型。在3KEYMASTER仿真平台上进行了论证,经测试该模型能够正确反映核电站汽轮机的动态特性。     

Influence of wind turbine power curve and electrolyzer operating temperature on hydrogen production in wind-hydrogen systems

Current simulation tools used to analyze, design and size wind-hydrogen hybrid systems, have several common characteristics: all use manufacturer wind turbine power curve (obtained from UNE 61400-12) and always consider electrolyzer operating in nominal conditions (not taking into account the influence of thermal inertia and operating temperature in hydrogen production). This article analyzes the influence of these parameters. To do this, a mathematical wind turbine model, that represents the manufacturer power curve to the real behaviour of the equipment in a location, and a dynamic electrolyzer model are developed and validated. Additionally, hydrogen production in a wind-hydrogen system operating in “wind-balance” mode (adjusting electricity production and demand at every time step) is analyzed. Considering the input data used, it is demonstrated that current simulation tools present significant errors in calculations. When using the manufacturer wind turbine power curve: the electric energy produced by the wind turbine, and the annual hydrogen production in a wind-hydrogen system are overestimated by 25% and 33.6%, respectively, when they are compared with simulation results using mathematical models that better represent the real behaviour of the equipments. Besides, considering electrolyzer operating temperature constant and equal to nominal, hydrogen production is overestimated by 3%, when compared with the hydrogen production using a dynamic electrolyzer model.     

惯性储能环节对汽轮机实时经济性计算的影响研究

电厂的汽轮机组在运行过程中并非保持稳定的工况,而是随着实际要求实时改变工况,即处于变工况的情况。由于机组内存在很大的蒸汽容积,在蒸汽容积对机组的影响下,机组内蒸汽参数的变化总是要比控制指令延迟一段时间,我们称此过程为惯性储能环节。通过Matlab工具,对惯性储能环节进行了建模仿真,分析了惯性储能环节对机组蒸汽参数的影响,提出了考虑惯性储能环节的汽轮机实时经济性计算方法,最后基于提出方法评价了惯性储能环节对汽轮机实时经济性的影响。     

Dynamic simulation of a novel nuclear hybrid energy system with large-scale hydrogen storage in an underground salt cavern

In this study, a nuclear hybrid energy system (NHES) with large-scale hydrogen storage integrated with a gas turbine cycle is proposed as a flexible system for load following. The proposed system consists of a nuclear reactor, a steam Rankine cycle, a hydrogen electrolyzer, a storage system for hydrogen in an underground salt cavern, and a Brayton cycle that uses hydrogen as fuel to generate additional electricity to meet peak demand. A dynamic mathematical model is developed for each subsystem of the NHES. To evaluate the potential benefits of the system, a one-year study is conducted, using scaled grid demand data from ISO New England. The dynamic simulation results show that the system is capable of meeting the demand of the grid without additional electricity from outside sources for 93% of the year, while decreasing the number of ramping cycles of the nuclear reactor by 92.7%. There is also potential for economic benefits as the system only had to ramp up and down 7.4% of the year, which increased the nuclear capacity factor from 86.3% to 98.3%. The simulation results show that the proposed hybrid system improves the flexibility of nuclear power plants, provides more electricity, and reduces greenhouse gas emissions.     

锅炉参数变化时汽轮机系统的仿真算法

采用实时仿真算法对锅炉-汽轮机系统动态特性进行了整体性模拟。首先建立了详尽的汽轮机各部件动态数学模型和热力系统流量网络计算模型，特别是除氧器、表面加热器和凝汽器的通用动态数学模型；然后，将汽轮机系统动态模型与锅炉系统动态模型连接为整体仿真模型，并进行仿真。该文还列出了锅炉某些参数变化时汽轮机系统几个关键基本参数仿真结果。对电站锅炉-汽轮机系统的整体性模拟可以对运行人员进行更加全面的指导，并且为进行单元机组的瞬态性能计算，进而修正稳态性能计算结果奠定了基础。图12参3     

Synergistic integration of a gas turbine and solid oxide fuel cell for improved transient capability

A theoretical solid oxide fuel cell–gas turbine hybrid system has been designed using a Capstone 60 kW micro-gas turbine. Through simulation it is demonstrated that the hybrid system can be controlled to achieve transient capability greater than the Capstone 60 kW recuperated gas turbine alone. The Capstone 60 kW gas turbine transient capability is limited because in order to maintain combustor, turbine and heat exchangers temperatures within operating requirements, the Capstone combustor fuel-to-air ratio must be maintained. Potentially fast fuel flow rate changes, must be limited to the slower, inertia limited, turbo machinery air response. This limits a 60 kW recuperated gas turbine to transient response rates of approximately 1 kW s⁻¹. However, in the SOFC/GT hybrid system, the combustor temperature can be controlled, by manipulating the fuel cell current, to regulate the amount of fuel sent to the combustor. By using such control pairing, the fuel flow rate does not have to be constrained by the air flow in SOFC/GT hybrid systems. This makes it possible to use the rotational inertia of the gas turbine, to buffer the fuel cell power response, during fuel cell fuel flow transients that otherwise limit fuel cell system transient capability. Such synergistic integration improves the transient response capability of the integrated SOFC gas turbine hybrid system. Through simulation it has been demonstrated that SOFC/GT hybrid system can be developed to have excellent transient capability.