凝汽器换热系数计算及空气含量和污垢厚度对真空的影响分析  

Calculation of condenser heat transfer coefficient and analysis of the influence of air content and scale on condenser vacuum

作　　者：韩中合[1] 吕宏[1] 李志刚 

机构地区：[1]华北电力大学电站设备状态监测与控制教育部重点实验室,河北保定071003 [2]内蒙古达拉特发电厂,内蒙古鄂尔多斯014300

出　　处：《华北电力大学学报（自然科学版）》2009年第1期59-63,共5页Journal of North China Electric Power University：Natural Science Edition

摘　　要：对计算凝汽器换热系数的HEI公式、别尔曼公式和分部计算法进行了分析比较,介绍了如何利用分部计算法分析空气含量和污垢厚度对凝汽器换热系数的影响。定量分析了空气含量和污垢厚度对凝汽器换热及真空的影响趋势和影响程度。空气对凝汽器换热和真空的剧烈影响发生在空气相对含量小于0.5%时,随着空气含量的增加其影响逐渐减弱;水侧污垢对凝汽器换热系数和真空的影响与污垢层厚度基本上呈线性关系。The method of separate section calculating method which was used to analyse the influence of air content and scale on condenser heat transfer coefficient was presented. Characters of several calculating methods of condenser heat transfer coefficient were listed. The effects of air content and scale on condenser heat transfer and condenser vac- uum were analyzed with this method. The obvious influence of air on condenser heat transfer coefficient and condenser vacuum appears when air content is less than 0.5 %, and the degree of influence of air content decreases along with the increase of air content. The influence of the scale on condenser heat transfer coefficient and condenser vacuum is linear with the thickness of the scale.

关 键 词：动力机械工程 凝汽器 传热系数计算 空气对真空影响 污垢对真空影响 

分 类 号：TK261[动力工程及工程热物理—动力机械及工程]