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1、Improvement of ACC and Indirect Air Cooling 直接空冷与间接空冷的技术改进,Beijing GEA Energietechnik Co.,Ltd. 北京基伊埃能源技术有限公司,EGI Cooling SystemTrading(Beijing)Co.,Ltd. 亿吉埃冷却系统贸易(北京)有限公司,GEA 集 团,GEA集团(Global Engineering Alliance, 即:全球工程联盟) 是一个在全球50多个国家成功运营的大型工程技术集团,总部位于德国波鸿市,在全球拥有超过2万名雇员,年营业收入超过50亿欧元。GEA集团将其技术广泛应用于能
2、源、化学及石化、食品、空气处理、造船以及医药和美容等行业。GEA集团股份公司在德国法兰克福上市,是MDAX指数成份股。 GEA是空冷发电技术的发明者,自1920年代以来一直致力于电力冷却技术的开发、研究与工程应用,始终保持世界领先地位,并于1980年代进入中国,致力于中国能源工业所需的上述技术和产品的推广和应用。,GEA集团组织结构,直接空冷ACC,间接空冷,Innovation of large ACCs 超大型空冷岛技术最新进展,主讲人: 彭 纯,Beijing GEA Energietechnik Co.,Ltd. 北京基伊埃能源技术有限公司,北京基伊埃能源技术有限公司,德国GEA集团在
3、华独资企业,拥有雄厚的技术和管理能力,在中国全面从事发电冷却技术和产品(空冷凝汽系统、水冷塔系统及烟塔系统等)的设计、制造、成套、营销、项目执行和售后服务。,公司组织结构,公司在北京建有设计和项目管理中心,在廊坊和太原等地建有生产制造基地,并在上海设有分公司,在中国全面从事发电冷却技术和产品(空冷凝汽系统、水冷塔系统及烟塔系统等)的设计、制造、成套、营销、项目执行和售后服务。,公司产品范围,电站干式冷却系统 空冷凝汽系统(ACC) 湿式冷却系统 自然通风冷却塔 核电超大自然塔 排烟式自然塔(烟塔合一) 海水自然塔 机械通风冷却塔 辅助通风自然塔 组合冷却系统 干湿混合式却塔 干湿并行冷却系统(
4、PAC),在全世界范围内正在运行的空冷系统中,近700台套为GEA设计和建造; 作为直接空冷凝汽发电技术的发明者,GEA公司已在全球范围内拥有共计45台套600MW等级以上直接空冷系统业绩,其中中国大陆地区28台套,并已有13台套完成性能验收; GEA公司是第一个在中国大陆地区拥有大型直接空冷凝气系统业绩的厂商,包括国家发改委确立的空冷发电示范项目国电大同发电有限公司2x600MW 发电工程;,GEA公司所发明的世界上第一套发电用直接空冷凝汽系统于1939年在德国鲁尔矿区投运,至今仍可运行,南非马廷巴电厂(6X665 MW) 目前世界上最大容量的空冷电厂,空冷凝汽系统(ACC),Improve
5、ment of large ACCs超大型空冷岛技术改进,Matimba ACC layout 马廷巴电厂实拍(1991),What is recirculation ? 热风再循环现象,Improvement of large ACCs超大型空冷岛技术改进,横向风倒灌,纵向风旋涡,Improvement of large ACCs超大型空冷岛技术改进,Improvement of large ACCs超大型空冷岛技术改进,At Matimba turbine trips were experienced during westerly winds (i.e. winds coming ove
6、r the boiler + turbine hall towards the ACC. 在马廷巴项目中,汽机跳闸发生在炉后来风的情况下 After exhaustive CFD work on the Matimba ACC these problems could be ascribed to :根据经过大量CFD研究,马廷巴的问题原因可以归结如下: Fans stalling due to high crossflow velocities under the outer fans of units 1 to 6 ACC的外侧风机在下部横切风较大时,出现风机失速现象,从而导致风机出力下降
7、。 Poor breathing of the ACC due to small air inlet openings on the W side of the ACC (turbine hall side) ACC与汽机房相隔太近,影响了该侧进风。 Recirculation of hot air during periods with W winds 炉后来风时存在热风再循环现象 These problems with the Matimba ACC were alleviated by modifying some cladding at turbine hall and ACC the
8、reby increasing air inlet to ACC 通过在汽机房外墙上开通风窗的措施,改善空冷岛进风状态,马廷巴电厂的上述问题得到一定程度的减轻。,Improvement of large ACCs超大型空冷岛技术改进,Medupi ACC vs Matimba ACC 米都比与马廷巴空冷岛参数对比,Improvement of large ACCs超大型空冷岛技术改进,As a result of Eskoms experience with the Matimba ACC the Medupi ACC performance guarantees had to cover w
9、ind speeds between 0m/s and 9m/s and all wind directions. 根据马廷巴项目的经验,米都比项目空冷岛性能保证需满足各风向上风速在0m/s 到 9m/s 的要求 For the Medupi ACC four special features were incorporated to improve the ACCs thermal performance during windy conditions: 米都比项目针对风力影响问题采取了如下技术措施: Feature 1: Gap between the turbine hall and t
10、he ACC增大空冷岛与汽机房间距 Feature 2: The use of a windcross on ground level below the ACC在空冷岛内0米处设置十字交叉导风板 Feature 3: Solid walkway around the outside of wind walls on deck level 步梯在平台上的部分设在挡风墙外 Feature 4: Using fans with larger pressure margin选用大风压裕度风机,The effect of these proposed features were tested exte
11、nsively using CFD investigations by GET and Aerotherm. 大量数模试验的证明以上技术措施是有效的。,Improvement of large ACCs超大型空冷岛技术改进,Matimba PS ACC 马廷巴空冷岛,Improvement of large ACCs超大型空冷岛技术改进,Medupi PS ACC 米都比空冷岛,Improvement of large ACCs超大型空冷岛技术改进,Medupi ACC layout 米都比空冷岛布置图(数模分析),Improvement of large ACCs超大型空冷岛技术改进,Fea
12、ture 1 : gap between the turbine hall and the ACC (to improve breathing of ACC during operation with W wind) 特点1 :增大空冷岛与汽机房间距(改善炉后风占主导时的空冷岛进风情况),gap,Improvement of large ACCs超大型空冷岛技术改进,Feature 2: The use of a windcross on ground level below the ACC (ensures good air flow though the complete ACC duri
13、ng non-W wind) 特点2:在空冷岛内内0米处设置十字交叉的导风板(保证非炉后风时空冷岛进风状况),这种设计对无风状态无负面影响,也易于实现。,Improvement of large ACCs超大型空冷岛技术改进,Feature 3: solid walkway around the outside of windwalls (reduces recirculation for all wind directions) 特点3:空冷平台以上部分的步道设在挡风墙外(减小各风向的热风再循环),Improvement of large ACCs超大型空冷岛技术改进,Feature 3 (
14、cont.): solid walkway around the outside of windwalls (reduces recirculation for all wind directions) 特点3(续):空冷平台以上部分的步道设在挡风墙外(对减小各风向的热风再循环有一定的效果),Note effect of solid walkway in preventing recirculation 步道对防止热风再循环的影响,Improvement of large ACCs超大型空冷岛技术改进,Feature 4: 34 ft 8-bladed low noise fan vs 34
15、ft 8-bladed standard fan 特点4:低噪声风机(34ft的8叶片)与标准风机(34ft的8叶片)的比较,Standard fan (similar to Matimba fan) 标准风机(类似于马廷巴采用风机) 725mm chord length 弦长725mm 15% pressure margin 15%风压裕度,Low noise fan (Medupi) 低噪声风机(米都比采用) 1250mm chord length (+72%) 弦长1250mm( 增大72%) 86% pressure margin 86%风压裕度,Improvement of larg
16、e ACCs超大型空冷岛技术改进,Feature 4 (cont.): 34 ft 8-bladed low noise fan vs 34 ft 8-bladed standard fan 特点4(续):用低噪音风机(34ft的8叶片),Note higher air outlet temperature indicating reduced airflow as a result of crossflow on leading fans 较高的风温表示首排风机受横切风影响导致该处冷却空气风量减少,Improvement of large ACCs超大型空冷岛技术改进,Inclined du
17、ct design Y型排汽管道布置(倾斜式管道布置)专利设计,Improvement of large ACCs超大型空冷岛技术改进,Inclined duct design Y型排汽管道布置专利设计,专利技术 侵权必究,- State of the Art - - 传统的技术发展 - Duct routing with angle 角管路布置,90,- GEA Innovation - GEA 的革新 - Duct routing with soft angle 缓置,90,10- 30,10-30,Improvement of large ACCs超大型空冷岛技术改进,Steam,Ste
18、am,Bad steam distribution 较差的蒸汽配送 High pressure loss 较高的压损 “Past“ 过去,GEA PATENT GEA 专利,Results of computer animated steam flow simulation 蒸汽流动的计算机动画仿真结果,“GEA Present Praxis“ “GEA专利实现” Optimal steam distribution 最优的蒸汽配送 Minimized pressure loss 压损减至最低,Improvement of steam flow 蒸汽流动改善,Improvement of la
19、rge ACCs超大型空冷岛技术改进,Easy and quick erection 简易和快捷的安装,Improvement of large ACCs超大型空冷岛技术改进,Customer benefits during fabrication, shipping and erection for a 2x600MW GEA Air Cooled Condenser: 以一个2600MW GEA 空冷凝汽系统为例,列举用户在制造、运输和安装方面所获得的效益: Figures below shall be used as reference only: 下列数值仅供参考: Saving of
20、 duct material incl. erection labour 200ton 2,000,000 RMB 节省管材(包括人工)约200吨 : Saving of platform steel structure 20ton 节省平台钢结构约 20 吨 : 170,000 RMB Saving of shipping cost 节省相应运输成本 : 60,000 RMB - Total cost saving for customer/用户方面总的成本节省 : 2,230,000 RMB End user benefits of GEAs ACC GEA 斜型管径设计的益处 : Min
21、imized pressure loss with optimum of steam distribution 在最优的蒸汽分布状态下取得最小的蒸汽压损 Reduced cost of Exhaust Steam Duct and shorter erection time 排汽管道成本减少且安装工期缩短,Benefits of GEAs inclined duct routing GEA 斜型管径设计的益处,Improvement of large ACCs超大型空冷岛技术改进,World-Wide / 世界范围 : Power Plant: Power output: Duct diame
22、ter: Country: Year of const.: 电站 : 出力 : 管道直径 : 国家 : 建设年份 : Amorebieta 1x 800MW 1x DN 8000 Spain 2003 Altomonte 1x 770MW 1x DN 7000 Italy 2003 Voghera 1x 400MW 1x DN 5000 Italy 2003 Candela 1x 380MW 1x DN 5200 Italy 2003 Tynagh 1x 400MW 1x DN 5600 Ireland 2004 Kogan Creek 2x 500MW 2x DN 6000 Australi
23、a 2005 Aluar 1x 300MW 1x DN 5600 Argentina 2006 Catalagzi 1x 150MW 1x DN 5000 Turkey 2006 Medupi 6x 800MW South Africa 在建 Within China / 中国国内 : Power Plant: Power output: Duct diameter: Country: Year of const.: 电站 : 出力 : 管道直径 : 国家 : 建设年份 : Tuoketuo III + IV 4x 600MW 2x DN 6000 China 2004 / 2006 Taiy
24、uan 2 2x 300MW 2x DN 5500 China 2005 Lingwu 2x 600MW 2x DN 6000 China 2005 Jinjie I + II 4x 600MW 2x DN 6000 China 2005 / 2007 Hancheng 2x 600MW 2x DN 6000 China 2006 Baiyinhua 2x 600MW 2x DN 6000 China 2006,Reference List of GEAs patented duct routing design GEA 管路专利设计的已有业绩清单,Improvement of large A
25、CCs超大型空冷岛技术改进,Conclusions 总结,ACCs experience a number of problems when operating in windy conditions. These problems are compounded on ACC with large decks, e.g. the ACCs serving multi-unit power stations. 大风对空冷岛运行影响较大,尤其当空冷平台较大时(如多机组并排、超大容量机组等); As part of the Medupi ACC project, four different ACC
26、 design features to mitigate the effect of wind were identified and evaluated. 米都比项目中,经过CFD验证和评估,通过采取四项技术措施,可以减轻大风的不利影响; If the Medupi ACC has been built with a layout similar to that of the Matimba ACC (i.e. without a large gap between turbine hall, without wind cross, etc.) the Medupi ACC would ha
27、ve to have needed to be approximately 10% to 15% larger. 如果米都比采用类似于马廷巴的方案(与汽机房间距小;没有交叉导风板等),则空冷岛将增大约10%15%. The inclined duct design reduces the exhaust duct pressure drop and safes material and labour costs. Y型排汽管道专利设计减小排汽管压阻、节省大管道用量、减少安装人工用量。,期待与您的合作,谢谢大家!,北京基伊埃能源技术有限公司 电话: +86-10-65907049 传真: +86-10-65907048 网址:www.get-,Improvement of Indirect Air Cooling 间接空冷技术改进,主讲人: Zsolt Forray(Sales Manager),EGI Cooling SystemTrading(Beijing)Co.,Ltd. 亿吉埃冷却系统贸易(北京)有限公司,
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