Analysis of condenser shell side pressure drop based on the mechanical energy loss  

作　　者：ZENG Hui MENG JiAn LI ZhiXin 

机构地区：[1]Key Laboratory of Thermal Science and Power Engineering of Ministry of Education,School of Aerospace,Tsinghua University Beijing 100084,China

出　　处：《Chinese Science Bulletin》2012年第36期4718-4725,共8页

基　　金：supported by the National Natural Science Foundation of China(51036003);the National Basic Research Program of China (2007CB206901)

摘　　要：The condenser performance is strongly affected by the tube arrangement.The steam pressure drop in the tube bundle influences the condenser back pressure,which is an important indicator of the condenser performance used to compare different condenser tube arrangements.The condenser shell side pressure drop is studied here using the mechanical energy loss of the steam flow in the condensers.The mechanical energy loss is due to the flow resistance of the tube bundle and the steam condensation.Three typical tube arrangements are analyzed numerically.The results show that a higher condenser shell side pressure drop for different tube arrangements always corresponds to a larger mechanical energy loss.The mechanical energy loss is mainly in the periphery of the tube bundle,indicating that the flow pattern and the mechanical energy losses are markedly determined by the tube bundle profile.The condenser shell side pressure drop can be reduced by reducing the total mechanical energy loss when the steam enters the tube bundle more uniformly.Thus,a well designed tube arrangement will reduce the mechanical energy loss,and also the shell side pressure drop.The condenser performance is strongly affected by the tube arrangement. The steam pressure drop in the tube bundle influences the condenser back pressure, which is an important indicator of the condenser performance used to compare different condenser tube arrangements. The condenser shell side pressure drop is studied here using the mechanical energy loss of the steam flow in the condensers. The mechanical energy loss is due to the flow resistance of the tube bundle and the steam condensation. Three typical tube arrangements are analyzed numerically. The results show that a higher condenser shell side pressure drop for different tube arrangements always corresponds to a larger mechanical energy loss. The mechanical energy loss is mainly in the periphery of the tube bundle, indicating that the flow pattern and the mechanical energy losses are markedly determined by the tube bundle profile. The condenser shell side pressure drop can be reduced by reducing the total mechanical energy loss when the steam enters the tube bundle more uniformly. Thus, a well designed tube arrangement will reduce the mechanical energy loss, and also the shell side pressure drop.

关 键 词：机械能损失 冷凝器 压力降 壳侧 基础 能量损失 蒸汽流 蒸汽冷凝 

分 类 号：TQ051.5[化学工程]