热力发电
熱力髮電
열력발전
THERMAL POWER GENERATION
2014年
7期
27-31,40
,共6页
周兰欣%吴瑞康%丁斌开%陈健
週蘭訢%吳瑞康%丁斌開%陳健
주란흔%오서강%정빈개%진건
1 000 MW机组%湿式冷却塔%补风管%出塔水温%发电量
1 000 MW機組%濕式冷卻塔%補風管%齣塔水溫%髮電量
1 000 MW궤조%습식냉각탑%보풍관%출탑수온%발전량
1 000 MW unit%wet cooling tower%catheter pipe%outlet temperature%power output
针对现有冷却塔中央区域换热效果差的问题,提出了在塔内加装中央补风管的方案.将空气直接送入冷却塔中心区域,加强塔内换热.以某1000 MW机组冷却塔为例,采用Fluent软件建立冷却塔三维热力性能计算模型.计算结果表明,加装补风管后冷却塔出塔水温比改造前平均降低0．433℃,机组发电量增加2~3 MW.
針對現有冷卻塔中央區域換熱效果差的問題,提齣瞭在塔內加裝中央補風管的方案.將空氣直接送入冷卻塔中心區域,加彊塔內換熱.以某1000 MW機組冷卻塔為例,採用Fluent軟件建立冷卻塔三維熱力性能計算模型.計算結果錶明,加裝補風管後冷卻塔齣塔水溫比改造前平均降低0．433℃,機組髮電量增加2~3 MW.
침대현유냉각탑중앙구역환열효과차적문제,제출료재탑내가장중앙보풍관적방안.장공기직접송입냉각탑중심구역,가강탑내환열.이모1000 MW궤조냉각탑위례,채용Fluent연건건립냉각탑삼유열력성능계산모형.계산결과표명,가장보풍관후냉각탑출탑수온비개조전평균강저0．433℃,궤조발전량증가2~3 MW.
Aiming at enhancing heat transfer in central area of the present cooling towers,new scheme that installing central catheter pipes in the tower was put forward.In this scheme,the fresh air is directly transported to central area of the cooling tower to enhance the heat and mass transfer.Taking a natural draft wet cooling tower for a 1 000 MW unit as the example,its three-D thermal performance calculation model was established by the FLUENT software.The analysis show that,after the catheter pipes were installed,the outlet water temperature of the cooling tow-er dropped by an average of 0.433 ℃,and the unit power generation increased by 2 to 3 MW.
