直接空冷单排管换热器试验研究  

Experimental Research on Direct Air-cooled Single-row Tube Heat Exchanger

作　　者：陆斌[1] 孔德春[1] 陶黎明[1] 厉日竹[1] 

机构地区：[1]清华大学核能与新能源技术研究院,北京100084

出　　处：《现代电力》2009年第6期49-53,共5页Modern Electric Power

摘　　要：通过试验研究掌握单排管换热器流动和传热规律,对于空冷技术的国产化具有重要的意义。详细介绍了试验台架系统和测量方案。在深入分析了单排管换热器流动和传热过程的基础上,利用传热风洞对单排管换热器进行了热工水力试验研究。采用保持空气入口温度不变,同时固定初始温差的方法,综合考察了单排管换热器的流动阻力和空气侧传热系数等关键参数,得到了在不同空气迎面风速下流动阻力和传热的关联方程式,为工程优化设计提供依据。另外,还分析了不凝结气体对单排管换热器传热性能的影响。Studying the flow and heat transfer law of the single-row tube heat exchanger by experiments is of great importance to the nationalization of the air-cooled technology. The experimental frame system and measurement project are described in detail. On the basis of the in-depth analysis in the flow and heat transfer process of the single-row tube heat exchanger, thermal hydraulic experiments are conducted using the heat-transfer wind tunnel. Adopting the method of remaining the same inlet air temperature and fixing initial temperature difference, some pivotal parameters of the single-row tube heat exchanger are investigated synthetically, including flow pressure drop and air-side heat transfer coefficients. The corresponding equations of flow pressure drop and heat transfer under different frontal surface wind velocity are derived, which provides engineering optimal design with useful information. The influence of non-condensable gas on heat transfer performance of the single-row tube heat exchanger is analyzed.

关 键 词：单排管 直接空冷凝汽器 流动和传热特性 初始温差 迎面风速 不凝结气体 

分 类 号：TK264.1[动力工程及工程热物理—动力机械及工程]