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1)  air-cooled condenser
空冷凝汽器
1.
Based on the air-cooled condenser of a 300MW unit, the factors that affect the exhaust steam pressure were analyzed.
掌握火电站空冷凝汽器在各种工况下的运行特性,对于提高我国直接空冷机组的运行水平具有重要意义。
2.
Because a direct air-cooled condenser consists of several direct air cooling units,studies on these units have great significances.
直接空冷凝汽器由多个直接空冷单元组成,因此,对直接空冷凝汽器单元的研究具有重要的意义。
3.
It mainly included the numerical research on the plant-wide flow and heat transfer of direct air-cooled condenser,the R&D of heat exchanging elements and tube plats in direct air-cooled condenser,the optimized design for the air cooling system and steam exhausting pipes,etc.
结合工程项目的实际状况,介绍了火电厂直接空冷系统国产化关键技术研发的主要工作要点,其中包括直接空冷凝汽器全厂流动和传热的数值研究、直接空冷凝汽器换热元件和管束的研发、空冷系统的优化设计研究和空冷排汽管道的优化设计研究等。
2)  air cooled condenser
空冷凝汽器
1.
Direct air cooled condenser is composed of individual direct air cooled units.
直接空冷凝汽器由一个个直接空冷单元组成,对直接空冷凝汽器单元的研究具有重要的意义。
2.
The influence of the frontal velocity of air ,the air temperature and the heat load of condenser on the performance of the air cooled condenser were also analyzed.
对电站直接空冷凝汽器变工况计算进行了研究 ,绘制了空冷凝汽器特性曲线 ,分析了迎面风速、环境气温、凝汽器热负荷对空冷凝汽器性能的影
3.
The elliptical tube with rectangular plate fin,which is usually called double row tube,is one kind of basic heat exchange element for direct air cooled condensers.
矩形翅片椭圆管,即双排管是直接空冷凝汽器的一种基本换热元件。
3)  air-cooling condenser
空冷凝汽器
1.
The principle of the direct air-cooling condenser and the characteristics of the development process were introduced and the application status of the direct air-cooling technology at home and a.
介绍了直接空冷系统的工作原理、特点及直接空冷凝汽器的发展过程,并对直接空冷技术在国内外发展现状及其在建筑节能中的应用做了介绍。
2.
By studying the structure and calculation theory of air-cooling condenser,the dynamic mathematics model was established by using the engineering modular modeling method,and process simulation algorithms was developed with the support of STAR-90 simulation software.
在深入了解直接空冷凝汽器系统内部结构、系统构成及凝结换热计算原理的基础上,充分考虑凝汽器结构参数和工质物性参数对传热过程的影响,运用工程模块化建模方法,建立了直接空冷凝汽器各冷却单元凝结换热及空冷凝汽器整体压力计算的动态仿真模型。
3.
In order to improve the efficiency of air-cooling condensers and optimize the geometric structure of their flat tube fins,a three-dimensional numerical model for flow passage of flat tubes with discontinuous wavy fins has been built,and corresponding numerical calculation with software FLUENT performed.
为进一步提高空冷凝汽器的效率,优化扁平管翅片的物理结构,建立了间断波纹翅片扁平管换热器通道的三维物理数学模型,利用FLUENT软件进行数值计算。
4)  air cooling condenser
空冷凝汽器
1.
The main factor affecting the heat-exchanging performance of direct air cooling condenser is backflow or recirculation of the hot air resulted from the ambient strong wind.
影响空冷凝汽器换热性能的主要因素是环境大风所造成的热风回流或热风再循环。
2.
Some problems ever occurred in the initial commissioning stage,for example,the units conldn t operate at full load in summer,the impacts of unfavonrable wind direction on the air cooling condenser system were severe,leakages occurred in the direct air cooling systems of units and the oxygen contents in the condensates were higher etc.
山西漳山发电有限责任公司(以下简称漳山公司)2×300MW直接空冷机组目前运行比较稳定,在机组运行期间暴露出一些问题,如夏季机组不能满负荷运行、空冷凝汽器系统受不利风向的影响比较严重、机组真空系统的泄漏和凝结水含氧量高的问题等。
5)  direct air cooling condenser
直接空冷凝汽器
1.
The cause resulting in occurance of said problem is the bad quality of cold washing and washing for the direct air cooling condenser.
产生此问题的原因是直接空冷凝汽器冷态冲洗和热态冲洗质量不良。
6)  direct air-cooling condenser
直接空冷凝汽器
1.
Mass ratio between gas exhaust and steam extract,a new design index of direct air-cooling condenser was described in this paper.
本文提出一个新定义的直接空冷凝汽器设计指标———抽气带汽质量比 ,并用导出公式的计算结果直观地说明抽气带汽质量比与凝汽器抽气压力Pc及排气温度t的关系 ,认为直接空冷凝汽器的抽气温度t比抽气压力Pc之饱和汽温低 (即Δt取值 ) 2~ 4℃较为合适。
补充资料:空冷发电机的运行


空冷发电机的运行
operation of air-cooled generator

刀ledl组和!封闭:行冷l发电}封系互等一;损耗〔量范尸200£量范咬低,·些特l常在l功率!应由甲(即i进风,以免i升高L度愈;的品kongleng fodlon}一de yunxlng空冷发电机的运行(operation of air一cgenerator)空冷发电机的定子绕组、转子绍定子铁芯均采用空气冷却。冷却空气一般都采月循环系统,机内装有空气冷却器,对循环空气泛却。以前空气冷却方式只用于50 MW及以下白机。但由于空冷发电机不需要外部冷却系统和翻统,因此,具有造价低、运行可靠性高、维护简仁系列优点,再加之一些制造厂在绝缘系统和降作方面采用了一些新技术和新工艺,使其使用的毛围不断扩大,目前有的制造厂已生产和投运-MW空冷发电机,并认为在200 MW及以下的笔围内,空冷发电机可能成为发展方向之一。 由于空冷发电机的容量相对较小.电压相对因此作为带变动负荷或调峰机组使用时,会有一殊问题。 发电机作调峰机组使用,就不可避免地要经电压和功率因数变动情况下运行,发电机的输d和定子电流也需要作相应变动,允许变动的范日专门的温升试验确定. 50MW以下的空冷发电机一般都为表面冷外冷),因此进风温度对其绕组温升影响较大,翌温度高于额定值时.定子电流必须作相应的降低定子绕组过热。一般进风温度在35~55℃之间右1℃,定子电流较额定值降低1%一3%,进风接高,降低的百分数愈大。 由于空气内冷技术的应用,对机内冷却空左质提出了更高的要求,还对其湿度有要求:应超过50%;不超过50%,,除了原有的除尘方面的要乏①运行中的机内空气相对湿②为保证停机期间机内空气相对澳要求配备加热装里.
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
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