期刊
JOURNAL OF ENHANCED HEAT TRANSFER
卷 28, 期 3, 页码 63-90出版社
BEGELL HOUSE INC
DOI: 10.1615/JEnhHeatTransf.2021036375
关键词
liquid-vapor separation; air-cooled condenser; condensation; two-phase flow; vapor quality
资金
- Fundamental Research Funds for the Central Universities [2018JBZ108]
This study investigated the use of liquid-vapor separation in air-cooled condensers and found that it significantly improved heat transfer, potentially reducing condenser size. Key factors affecting the liquid-vapor separation process included the number of separation devices, wind velocity, and total mass flow rate, with in-tube pressure drop being the dominant parameter affecting efficiency. The liquid-vapor separation condenser design had better thermal-hydraulic performance than a serpentine condenser due to enhanced heat transfer.
This work characterizes the use of liquid-vapor separation inside air-cooled condensers and its effect on thermal-hydraulic performance. A series of 3 mm inner diameter U-tubes were installed in the condenser for the liquid-vapor separation with 6 mm inner diameter and 215 mm long-finned condenser tubes. R134a was used as the working fluid. During operation, condensed R134a was separated by the liquid-vapor separation device to significantly improve the heat transfer compared to that of a serpentine condenser without liquid-vapor separation. In addition, fewer tubes were required inside the air-cooled condenser due to its high heat transfer rates, which indicated a potential for reducing the condenser size. This study investigated the key factors affecting the liquid-vapor separation process, such as the number of liquid-vapor separation devices, the wind velocity, and the total mass flow rate. The results indicated that in-tube pressure drop is the dominant parameter affecting separation efficiency. This liquid-vapor separation condenser design had better thermal-hydraulic performance than a serpentine condenser due to the enhanced heat transfer. Adding an additional liquid-vapor separation structure changed the separation conditions of the previous separation structure and made the condensation heat transfer more uniform.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据