23带冷却塔的循环冷却水系统泵房前池涌波分析http://dlkc.cbpt.cnki.net火力发电第7期DOI:10.13500/j.dlkcsj.issn1671-9913.2023.07.005带冷却塔的循环冷却水系统泵房前池涌波分析赵开伟,罗成春(中国电力工程顾问集团华东电力设计院有限公司,上海200063)摘要:对带冷却塔的循环冷却水系统事故停泵工况下,冷却塔集水池水位变化对泵房前池涌波的影响进行研究,推导循环冷却水系统非恒定流方程,求得水泵完全停泵下泵房前池波涌最高水位及第二振幅的解析解,并采用有限差分法对进行泵房前池波涌的历时过程进行分析研究。计算结果表明:常规设计情况下,不可忽略冷却塔集水池内水位变化对泵房前池涌波的影响;冷却塔内集水池中的水位波动降低了泵房前池的最高涌波值,增加了第二振幅值,减小了波动周期。关键词:循环冷却水系统;集水池;泵房前池;涌波;有限差分法中图分类号:TM621文献标志码:A文章编号:1671-9913(2023)07-23-03SurgeAnalysisofPumpHouseForebayinCirculatingCoolingWaterSystemwithCoolingTowerZHAOKaiwei,LUOChengchun(EastChinaElectricPowerDesignInstituteCo.,Ltd.ofChinaPowerEngineeringConsultingGroup,Shanghai200063,China)Abstract:Inthispaper,theinfluenceofthewaterlevelchangeofthecoolingtowersumponthesurgeintheforebayofthepumphouseisstudiedundertheconditionofpumpshutdowninthecirculatingcoolingwatersystemwithcoolingtower.Theunsteadyflowequationofthecirculatingwatersupplysystemisdeduced,andtheanalyticalsolutionofthemaximumwaterlevelandthesecondamplitudeofthesurgeintheforebayofthepumphouseundertheconditionofcompletepumpshutdownisobtainedhascarriedontheanalysisresearch.Theresultsshowthat:intheconventionaldesign,theinfluenceofthewaterlevelchangeinthecoolingtowersumponthesurgeintheforebaycannotbeignored;thewaterlevelfluctuationinthesumpreducesthemaximumsurgevalueintheforebayofthepumphouse,increasesthesecondamplitudevalue,andreducesthefluctuationperiod.Keywords:circulatingcoolingwatersystem;collectingbasin;pumphouseforebay;surgewave;FDM*收稿日期:2021-06-18第一作者简介:赵开伟(1988—),男,硕士,工程师,研究方向为电厂给排水系统。0引言非恒定流条件下循环冷却水系统运行中可能会出现泵机事故工况等,泵房前池的水位波动分析计算已受到设...