广东电力
廣東電力
엄동전력
GUANGDONG ELECTRIC POWER
2001年
2期
1-5
,共5页
汽轮机%启动%三菱%热应力%换热系数%灰色区间
汽輪機%啟動%三蔆%熱應力%換熱繫數%灰色區間
기륜궤%계동%삼릉%열응력%환열계수%회색구간
珠海发电厂第一期1号、2号机组采用日本三菱700MW凝汽式汽轮机，借助于先进的监控系统和管理经验，在不增加机组的寿命损耗的前提下，可明显地缩短启动时间。鉴此，介绍了机组的启动特性，结合某次实际冷态启动过程，利用有限元方法校核计算了高中压转子热应力，其中有限元模型的边界上的换热系数综合使用了各国普遍推荐的经验公式，形成灰色区间曲线。
珠海髮電廠第一期1號、2號機組採用日本三蔆700MW凝汽式汽輪機，藉助于先進的鑑控繫統和管理經驗，在不增加機組的壽命損耗的前提下，可明顯地縮短啟動時間。鑒此，介紹瞭機組的啟動特性，結閤某次實際冷態啟動過程，利用有限元方法校覈計算瞭高中壓轉子熱應力，其中有限元模型的邊界上的換熱繫數綜閤使用瞭各國普遍推薦的經驗公式，形成灰色區間麯線。
주해발전엄제일기1호、2호궤조채용일본삼릉700MW응기식기륜궤，차조우선진적감공계통화관리경험，재불증가궤조적수명손모적전제하，가명현지축단계동시간。감차，개소료궤조적계동특성，결합모차실제랭태계동과정，이용유한원방법교핵계산료고중압전자열응력，기중유한원모형적변계상적환열계수종합사용료각국보편추천적경험공식，형성회색구간곡선。
Along with the great capacity units with high valued parametersdiving into electric power production, a Mitsubishi 700 MW unit, designed for high operating efficiency and maximum reliability, has been installed in Zhuhai Power Station. The rational and optimal start-up procedure of the turbine makes the least need of time for a cold start-up with the least life consuming. Aiming at thermal stresses of the high and intermediate pressure (HP-IP) rotor, the start-up procedure of this unit is introduced. A new conception called gray boundary, concerning the conflict between each experiential formulas of heat transfer coefficient, is presented to obtain the temperature filed and the thermal stress field using finite element method (FEM). It is obvious that the interval value can express the thermal stress in a much better way.
