【摘要】 对上海汽轮机厂有限公司生产的2种超超临界660 MW机组三缸两排汽及四缸四排汽汽轮机从本体、技术经济指标、汽轮机房尺寸等几个方面进行了比较。结果表明,三缸两排汽汽轮机比四缸四排汽汽轮机少1个低压缸,汽轮机制造成本将降低;两者总换热面积基本相同,三缸两排汽汽轮机凝汽器横向尺寸较大;额定工况下,四缸四排汽汽轮机具有内效率较高,热经济性较好的特点,但在低负荷时,三缸两排汽汽轮机的效率更高;四缸四排汽汽轮机比三缸两排汽汽轮机可节省土建费用922万元。对机组选型提供了推荐意见。更多还原

【Abstract】 Two types of steam turbine for ultra-supercritical 660 MW units manufactured from Shanghai Steam Turbine Works,namely steam turbine with three cylinders and two exhaust outlets(type A) as well as steam turbine with four cylinders and four exhaust outlets(type B),have been compared each other in aspects of the structure and size of teh steam turbine proper,the technical and economical indices,and the size of turbine house,etc..Results show that the steam turbine of type A has one LP cylinder less than that of steam turbine of type B,the manufacturing cost of steam turbine will decrease;the total heating surface area of two types is basically identical,the lateral size of condenser for steam turbine of type A is larger;under rated operating condition,the internal efficiency of steam turbine of type B is greater,and its thermal economic efficiency is better,but under low load,the efficiency of steam turbine type A is even higher;the civil engineering cost of steam turbine type B can be saved 9.22 million yuan compared with that of steam turbine type A.The opinions for type selection of steam turbines have been also recommented.更多还原