Views:1 Author:Site Editor Publish Time: 2021-03-15 Origin:Site
Why does the heat exchanger adopt the hot and cold countercurrent type? As well as the design of the heat exchanger, what specific parameters need to be provided? In addition, when choosing the shell and tube side of the heat exchanger, what are the important things we should grasp? These problems are put forward mainly to solve them completely. Therefore, in the next time, we will carry out specific analysis and discussion to achieve the above-mentioned goals.
1. In the heat exchanger, why use the hot and cold countercurrent type?
For this, there are mainly two specific reasons:
Reason 1: If it is under the same heat transfer area, then, when using countercurrent operation, the amount of heating agent or coolant is smaller than that of parallel flow operation.
Reason 2: If the heating agent or the cooling agent are used in the same amount, the heat transfer area of the countercurrent operation of the heat exchanger is smaller than that of the parallel operation.
Therefore, based on the above two points, this conclusion can be produced, and its specific application, etc., in order to have a good use effect.
2. What specific parameters need to be provided for the design of the heat exchanger?
When designing a heat exchanger, it is necessary to know its shell side and tube side heat exchange medium inlet and outlet parameters, as well as the structural parameters of the heat exchanger, mainly these two. Among them, the inlet parameters of the heat transfer medium in the shell side and tube side mainly include pressure and temperature. In terms of structural parameters, there are types, tube diameters, number of tube passes, etc., which cannot be omitted.
3. What are the important points that we should grasp when choosing the shell-and-tube medium of the heat exchanger?
In this case, if it is specific, the main contradiction is to grasp the main contradiction, which is, which medium can go through the tube pass and which medium can go through the shell pass. Moreover, comprehensive consideration should be made according to the nature of the medium and the purpose of use, so as to obtain a satisfactory result, which is in line with the actual situation or meets the requirements. At the same time, it can also improve the heat transfer coefficient of the heat exchanger.