Efficient snakelike heat exchange device utilizing Dean Vortice effect

Abstract

The invention relates to an efficient snakelike heat exchange device utilizing the Dean Vortice effect. The efficient snakelike heat exchange device utilizing the Dean Vortice effect comprises a shell, a cooling medium inlet, a cooling medium outlet, a process medium inlet, a process medium outlet, a support and the like. When fluid medium flows in a snakelike heat exchange pipe, the Dean Vorticewith symmetrical vertex core distribution can be formed, and a remarkable acceleration function is achieved on fluid heat exchange. According to the efficient snakelike heat exchange device utilizingthe Dean Vortice effect, by analyzing and evaluating the intensity of the Dean Vortice and the heat exchange efficiency, the Dean Vortice intensity index corresponding to the optimum heat exchange efficiency is selected, optimal design is conducted on the structural parameter of the snakelike heat exchange pipe and the dimension parameter of the shell of the efficient snakelike heat exchange device, so that the fluid medium can reach the full turbulence state in the tube pass flowing process under the conditions of a small resistance force and linear loss, the thicknesses of a flow boundary layer and a temperature boundary layer close to the tube wall can be effectively lowered, the initiative convection heat exchange process is enhanced in the medium flow process, and the overall heat exchange efficiency of the efficient snakelike heat exchange device utilizing the Dean Vortice effect is improved. The efficient snakelike heat exchange device utilizing the Dean Vortice effect can be widely applied to the fields of oil refining, chemical industry, light industry, sewage treatment and the like and is wide in application range, high in heat exchange efficiency, excellent in performance and high in practicability,

Description

technical field [0001] The present invention relates to the technical field of actively enhanced heat transfer in the process of fluid flow, and more specifically relates to a high-efficiency serpentine heat transfer device based on the DeanVortice secondary flow active enhanced heat transfer effect. The heat transfer device can be widely used in petroleum, chemical, light Fluid heat transfer process in engineering, sewage treatment and other fields. Background technique [0002] Heat exchange equipment is a general process unit for heat exchange. It is widely used in chemical industry, oil refining, power, light industry, metallurgy, nuclear energy, shipbuilding, aviation, construction and other industrial sectors. Its metal consumption, power consumption and construction investment are in the whole project occupy a considerable share. Therefore, the operating performance and work efficiency of heat exchange equipment directly affect the stable operation and economic benef...

AI Technical Summary

Problems solved by technology

However, simply increasing the medium flow rate will lead to an increase in flow resistance and a sharp increase in equipment energy consumption

Enlarging the heat transfer area is one of the important ways to enhance the performance of shell-and-tube heat exchange equipment. The heat transfer area is increased by using small-diameter heat exchange tubes and expanding the surface heat transfer surface, but this method often results in equipment volume, technical The subsequent increase in facilities and investment restricts its wide application in chemical systems with fixed sites

Increasing the average heat transfer temperature difference is also an effective method to enhance the heat transfer performance of heat exchange equipment. It mainly uses different heat transfer surface layouts to change the average heat transfer temperature difference, or expands the temperature difference between the inlet and outlet of cold and hot fluids to increase the average heat transfer. temperature difference, but this method is usually limited by the production process and economic conditions in the implementation process, and the effect is limited

In addition, in industrial applications, components such as swirl slices and spiral ties are often inserted into the pipe to make it fully develop into turbulent flow. It can enhance the operating efficiency of heat exchange equipment to a certain extent, but usually results in higher flow resistance and operating costs

Images