缠绕管式换热器传热的优化设计及数值模拟

Optimal Design and Numerical Simulation of Heat Transfer in Wound Tube Heat Exchangers

采用响应面及多目标遗传算法对缠绕管式换热器中绕管的管径、层间距、换热管缠绕角度等对其传热性能、压降的影响情况进行了数值模拟研究,结果表明:缠绕管式换热器的壳侧压降随着层间距、缠绕角、同层管间距的增大而减小;壳侧换热系数随着层间距的增大而减小,随着管外径的增大而增大,随着螺旋角的增大而先增大后减小;数值模拟结果与实验结果接近,为绕管式换热器的优化设计提供了可靠依据,具有一定的工程应用价值。

In this paper,the response surface and multi-objective genetic algorithm are used to simulate the heat transfer performance and pressure drop of the tube in the tube type heat exchanger,such as the pipe diameter,the interval and the angle of the heat transfer angle.The results show that the pressure drop of the winding tube heat exchanger is with the interval,the winding angle and the interlayer tube.The heat transfer coefficient of the shell side decreases with the increase of the spacing,and increases with the increase of the outer diameter of the tube.It increases flrst and then decreases with the increase of the spiral angle.The numerical simulation results are close to the test results,which provides a reliable basis for the optimization design of the tube type heat exchanger and has certain engineering application value.