管壳式换热器壳侧传热与阻力性能的实验研究与预测  

Experimental Study and Prediction of Pressure Drop and Heat Transfer in Shell-side of Tube-and-shell Heat Exchangers

作　　者：谢公南[1] 彭波涛[1] 陈秋炀[1] 王秋旺[1] 罗来勤[1] 黄彦平[2] 肖泽军[2] 

机构地区：[1]西安交通大学动力工程多相流国家重点实验室,陕西省西安市710049 [2]中国核动力研究设计院空泡物理和自然循环国家重点实验室,四川省成都市610041

出　　处：《中国电机工程学报》2006年第21期104-108,共5页Proceedings of the CSEE

基　　金：国防科技重点实验室基金项目(51482100204JW0801);国家教育部"新世纪优秀人才支持计划资助"项目(NCET-04-0938)。

摘　　要：设计并建立了换热器传热与阻力的综合性能实验台,对1种弓形折流板换热器和2种连续螺旋折流板换热器壳侧的传热及阻力性能进行了实验研究,实验介质管侧为水,壳侧为油;同时基于壳侧传热实验数据;应用遗传算法预测了换热器的总换热量。实验结果表明:在相同的壳侧流量下,螺旋折流板换热器的阻力要高于弓型折流板换热器,正进正出螺旋折流板换热器的阻力高于侧进侧出螺旋折流板换热器;螺旋折流板换热器的换热系数高于弓型折流板换热器,侧进侧出螺旋折流板换热器高于正进正出螺旋折流板换热器,而且流量越大这种优势越明显。预测结果表明通过遗传算法得到的传热关联式所得的换热量比采用线性回归所得的更加接近实验数据,表明遗传算法可应用于工程中换热设备性能的预测。Performances of heat transfer and pressure drop through shell-side in three types of shell-and-tube heat exchangers, of which one with conventional segmental baffles and the other two with continuous helical baffles, were experimentally carried out with water flowing in tube-side and oil flowing in shell-side. Genetic algorithm was used to predict heat transfer performances based on searching constants of correlations under limited experimental data. The experimental results show that under the same flow rate in shell-side, the heat exchangers with continuous helical baffles offer higher total pressure drop and heat transfer coefficient than that of heat exchanger with segmental baffles, especially increase with the increase of fluid flow rate. The predicted heat transfer rates based on correlations, of which their constants determined by means of genetic algorithms, enable the closer fit to experimental data than those by regression analysis in the reference, indicating that genetic algorithm may be recommended to predict performance of heat exchange devices in engineering application.

关 键 词：换热 压降 管壳式换热器 实验研究 连续螺旋折流板 预测 遗传算法 

分 类 号：TK124[动力工程及工程热物理—工程热物理]