【摘要】 通过在壳程内安装密封器件,对传统的管壳式换热器进行了结构改进。密封器堵住了折流板与壳体之间的间隙,有效地消除了换热器壳体内部的流体短路现象。实验结果表明,换热器安装密封器后,壳程的对流换热系数增加20%—25%,总传热系数增加15%—19%,有效地提高了换热器的换热性能。虽然换热器壳程的阻力损失有所增加,但泵耗功率的增量小于10 W,相对于换热量的增加可以忽略不计。此研究对换热器的节能优化设计有着重要的指导意义。更多还原

【Abstract】 The configuration of shell-and-tube exchanger was improved through installation of sealer in the shell.The gap between the baffle plates and shell was blocked by the sealer,which effectively decreased the short circuit flow in the shell.The experimental results show that the convective heat-transfer coefficient in the shell of improved heat exchanger increases by 20%-25%,the total-heat-transfer coefficient increases by 15%-19%,while the pump output power is less than 10 W.Though pressure losses increase with the sealer installation, the pump output power increases slightly,which can be neglected compared to the increase of heat exchange quantity.The heat transfer performance of improved heat exchanger is intensified obviously,which is benefit to the optimizing design of heat exchanger for energy saving.更多还原