Efficient shell and tube heat exchanger with changeable inner diameter of heat exchange pipe

Abstract

The invention discloses an efficient shell and tube heat exchanger with changeable inner diameter of a heat exchange pipe, aiming at providing a heat exchanger capable of enhancing the heat exchange effect, reducing the size and weight of the heat exchanger, and reducing consumption of metal materials. The efficient shell and tube heat exchanger comprises a shell, two end sockets, two tube plates, and a plurality of heat exchange flat tubes arranged in parallel in vertical direction, each heat exchange flat tube is internally provided with a plurality of in-tube channels arranged in vertical direction, and two ends of the in-tube channel in each heat exchange flat tube are respectively communicated with a distributary chamber and a converging chamber to form refrigerant flowing channels; the diameters of the in-tube channels of the heat exchange flat tubes arranged along the specific volume reduction direction of refrigerants are gradually reduced; and a spray nozzle spraying towards the interior of the shell is arranged at the upper part of the shell. The heat exchanger can enhance the heat exchange effect, reduce sizes of the heat exchanger, reduce consumption of metal materials, lower the cost and save energy resources by adopting interior in-tube channels and parallelly arranged vertical heat exchange flat tubes with different diameters and spraying out-tube fluid outside the heat exchange flat tubes through the spray nozzles.

Description

technical field [0001] The invention relates to the technical field of refrigeration, in particular to a high-efficiency shell-and-tube heat exchanger with varying inner diameters of heat exchange tubes. Background technique [0002] At present, the shell-and-tube heat exchanger in which the refrigerant flows in the heat-exchanging tubes adopts multiple heat-exchanging tubes of the same size arranged in parallel to pass through the tube holes of the tube sheet. The distribution chamber and the collection chamber communicate to form a refrigerant flow channel. Since the specific volume of the refrigerant changes during the heat exchange process between the heat exchange tube and the fluid outside the tube, in order to adapt to the change of the specific volume of the refrigerant, the partition plate on the head is usually used to separate the different chambers that communicate with the distribution chamber and the collection chamber. The number of heat exchange tubes to cha...

AI Technical Summary

Problems solved by technology

Due to the large number of heat exchange tubes, the shell diameter is larger

In addition, if the heat exchange tube is long, a support plate needs to be installed. In order to improve the convective heat transfer coefficient of the fluid outside the tube, a baffle plate needs to be installed. As a result, the effective heat exchange area is reduced. In order to ensure the heat exchange area, the heat exchange The overall length of the device is increased, the overall size is increased, the area is increased, the consumption of materials is increased, and the weight is increased

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