| 钢质管型对蒸发式冷凝器传热的影响 |
| |
| 引用本文： | 李元希,蒋翔,朱冬生,张景卫,王长宏.钢质管型对蒸发式冷凝器传热的影响[J].高校化学工程学报,2009,23(2). |
| |
| 作者姓名： | 李元希 蒋翔 朱冬生 张景卫 王长宏 |
| |
| 作者单位： | 华南理工大学,化学与化工学院,传热强化与过程节能教育部重点实验室,广东,广州,510640 |
| |
| 基金项目： | 国家自然科学基金，教育部高等学校博士学科点专项科研基金，广州市科技计划，华南理工大学科研基金 |
| |
| 摘 要： | 蒸发式冷凝器是一种高效冷却散热设备,其传热性能目前还需要深入研究.在总结蒸发式冷凝器传热特点的基础上,提出了采用新的钢质弹形管、扭曲管和弹形.扭曲间断管强化传热的新结构,并测试了它们应用于蒸发式冷凝器的流动与传热性能,与传统的圆管和椭圆管进行了对比.研究结果表明,在冷却水喷淋密度为0.06 kg·m-1s-1、管截面风速为3.4 m·s-1时,椭圆管、弹形管、扭曲管和间断管比圆管总传熟系数K分别高19.2%、24.4%、26.8%和31.2%.管内冷凝、管外水和空气的传热过程对总传热性能均有重要影响,弹形管可有效强化管外水膜与空气间的传热,同时降低空气流动压降;扭曲管可改善水膜分布,强化水膜传热,同时会增大空气流动压降:弹形-扭曲间断管可同时强化水膜、水膜与空气间的传热,略为减小空气流动压降.
|
| 关 键 词： | 蒸发式冷凝器 传热 强化传热管 气液两相流 冷凝 |
Effect of Special-Shape Steel Tubes on the Heat Transfer Performance of the Evaporative Condenser |
| |
| LI Yuan-xi,JIANG Xiang,ZHU Dong-sheng,ZIIANG Jing-wei,WANG Chang-hong.Effect of Special-Shape Steel Tubes on the Heat Transfer Performance of the Evaporative Condenser[J].Journal of Chemical Engineering of Chinese Universities,2009,23(2). |
| |
| Authors: | LI Yuan-xi JIANG Xiang ZHU Dong-sheng ZIIANG Jing-wei WANG Chang-hong |
| |
| Affiliation: | The Key Laboratory of Enhanced Heat Transfer&Energy Conservation;School of Chemistry and Chemical Engineering;South China University of Technology;Guangzhou 510640;China |
| |
| Abstract: | Evaporative condenser(EC)is a type of effective cooling equipment and a comprehensive study on its heat transfer performance is needed at present.Base on the understanding of the heat transfer characteristics of EC,three types of special-shaped steel heat exchange tubes(bullet-tube,twisted tube and bullet-twisted tube) were contrived respectively to enhance the heat transfer process in the EC.The fluid flow and heat transfer performances of the EC consisted of the above special-shaped steel heat exchange tu... |
| |
| Keywords: | evaporative condenser heat transfer enhanced heat transfer tubes air-water flow condensation |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
