热力发电
熱力髮電
열력발전
THERMAL POWER GENERATION
2009年
7期
23-26
,共4页
直接空冷凝汽器%扁平管%间断波纹翅片%数值模拟%结构优化
直接空冷凝汽器%扁平管%間斷波紋翅片%數值模擬%結構優化
직접공냉응기기%편평관%간단파문시편%수치모의%결구우화
direct air cooled condenser%flat tube%discontinuously corrugated fin tube%numerical simula-tion%structure optimization
蛇形扁平管在空冷机组的应用上取得了较好的效果,为进一步提高机组空冷凝汽器的冷凝效率,优化翅片式扁平管的结构,建立了间断波纹翅片式扁平管通道的三维物理数学模型.通过对对流换热系数、气侧换热量、流动损失的对比分析表明,间断波纹翅片式扁平管在空气侧换热量和流动损失方面比蛇形翅片式扁平管有一定的优势.
蛇形扁平管在空冷機組的應用上取得瞭較好的效果,為進一步提高機組空冷凝汽器的冷凝效率,優化翅片式扁平管的結構,建立瞭間斷波紋翅片式扁平管通道的三維物理數學模型.通過對對流換熱繫數、氣側換熱量、流動損失的對比分析錶明,間斷波紋翅片式扁平管在空氣側換熱量和流動損失方麵比蛇形翅片式扁平管有一定的優勢.
사형편평관재공랭궤조적응용상취득료교호적효과,위진일보제고궤조공냉응기기적냉응효솔,우화시편식편평관적결구,건립료간단파문시편식편평관통도적삼유물리수학모형.통과대대류환열계수、기측환열량、류동손실적대비분석표명,간단파문시편식편평관재공기측환열량화류동손실방면비사형시편식편평관유일정적우세.
Better effectiveness had been obtained in applying snake-shaped finned flat tubes onto air-cooled units. In order to further enhance the condensing efficiency of air-cooled condensers for the said units,and optimize the structure of finned flat tubes, a three-dimenssional physico-mathematical model of a channel formulated by discontinuously corrugated fin flat tubes has been established.Through comparison and analysis of the convection heat transfer coefficient, heat amount transferred to the air side,and the flow loss etc. ,it shows that the discontinuously corrogated fin flat tubes boast cer-tain superiority in aspects of the heat amount transferred to air side and the flow loss as compared withthat of the snake-shaped finned flat tubes.
