泄漏对管壳式换热器换热性能影响 吴国忠.docVIP

中国工程热物理学会 传热传质学 学术会议论文 编号： 泄漏对管壳式换热器换热性能影响 吴国忠，(林林，李栋，齐晗兵，王秋实 （东北石油大学土木建筑工程学院，黑龙江 大庆 163318） (Tel:0459-6507763, E-mail: lidonglvyan@126.com) 摘 要：针对油油管壳式换热器换热管泄漏中涉及到的传热问题，建立了管壳式换热器三维的数理模型，采用有限体积法结合壁面函数法对管壳式换热器内流动传热过程进行数值模拟。研究结果表明：随着泄漏口尺寸的增加，换热器的泄漏量增加，泄漏口处的速度增大，管程、壳程的比压降值之差增大，换热器的计算传热系数减小；对于同一根泄漏管，泄漏口位置沿换热管长方向变化时，换热器的泄漏量、泄漏口处的速度、管程与壳程的比压降值之差、换热器的计算传热系数等均随之变化；随着泄漏口数量的增加，泄漏量增加，泄漏方向变化，管程、壳程的比压降值之差减小。 关键词：管壳式换热器；泄漏；流动传热；数值模拟The Impact of Leakage on Heat Transfer Performance of Tube and Shell Heat Exchanger Wu GuoZhong, Lin Lin, Li Dong, Qi HanBing, Wang QiuShi (School of Architecture and Civil Engineering, Northeast Petroleum University, Daqing 163318, China) Abstract: The three-dimensional mathematical and physical model of shell and tube heat exchanger was established for the heat transfer problems involved in the leakage of heat exchanger. Study the heat transfer process of tube and shell heat exchanger in numerical simulation using the finite volume method combining with wall function method.The results showed that: With the leak hole size increasing, the leakage increased, the velocity of leak increased, the difference of pressure drop between tube and shell side increased, the calculational heat transfer coefficient decreased. The leakage, velocity of leak, the difference of pressure drop between tube and shell side and the calculational heat transfer coefficient are all changed with the leak hole location changes along the direction of tube length for the same leak tube.The leakage increased, Leaking direction changed and the difference of pressure drop between tube and shell side reduced with the increase of leak number. Key words：tube and shell heat exchanger; flow and heat transfer; numerical simulation0 前言 换热器是油田化工和其他许多工业部门广泛应用的一种通用工艺设备，其中管壳式换热器在石油化工行业中应用尤为广泛。大庆油田拥有大量的管壳式换热器，其性能直接影响原油的处理过程和油田节能减排的落实程度，而随着原油含水率增加，换热器结垢率明显增高，易造成其壁面的结垢甚至堵塞，并