| 摘要: |
| 分液冷凝器(liquid-vapor separation condenser LSC)是一种带分液隔板的平行流换热器，它可实现在冷凝过程中分段排出冷凝液，提高冷凝区域的制冷剂干度。利用标准焓差实验室，对比研究了采用不同分液隔板结构的分液冷凝器对整个制冷系统性能的影响。在保持室内侧工况不变(干/湿球温度为26.7℃/ 19.4℃)条件下，改变室外侧干球温度29~41℃，分别考察了3个具有不同分液隔板结构冷凝器的壁温和压降、系统耗功、制冷量及能效比(EER)的变化规律。实验结果表明，发现具有不同孔径结构分液隔板的冷凝器可以具有不同的热力性能，也可以具有相近的热力性能，设计合理的分液隔板可使冷凝器的冷凝段壁温几乎不变，且端压降最小。其系统的制冷剂流量最大，且制冷量和EER最高。由此可见，汽液分离的效果会使冷凝器获得更均匀的流量分配，降低两相流动阻力，提高制冷系统整体性能。 |
| 关键词: 分液隔板 冷凝器 制冷系统 流量分配 系统性能 |
| DOI： |
| 投稿时间：2012-12-13
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| 基金项目:国家自然科学基金（U0934006)资助项目 |
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| The Effect of Liquid-vapor Separation Baffles Structure in Air-conditioning System |
| Zheng Wenxian,Chen Ying,Zhong Tianming,Luo Yuebin,Wan Yuehua |
| (Faculty of Material and Energy Guangdong University of Technology;Guangzhou United A/C&R Co.,Ltd.) |
| Abstract: |
| Liquid-vapor separation condenser (LSC) is a kind of parallel flow heat exchanger with liquid-vapor separation baffles in its headers, which can drain away the condensate in time during condensation process. This paper experimentally studied the performances of three refrigeration systems employing three parallel-flow condensers with different liquid-vapor separation baffles in the standard air enthalpy difference lab. The indoor dry bulb and wet bulb temperature fixed at 26.7℃ and 19.4℃, the outdoor dry bulb temperature varied from 29℃ to 41℃. The refrigerant tube wall temperatures and pressure drops of the three condensers were investigated, as well as their power consumption, cooling capacity and energy efficiency ratio. The results indicated the performance of the LSC may be the same or not with the different liquid-vapor separations. Once an excellent design for the LSC was done, its wall temperature kept quasi-constant, and pressure drop was also minimum. Further, the system with the LSC can obtain maximum system refrigerant mass flow rate, as well as the maximum cooling capacity and EER. |
| Key words: liquid-vapor separation baffles condenser refrigeration system flow distribution system performance |
