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Selection of plate heat exchanger
Source: Time: 2021-01-11 13:56:03 Hit:
The selection of plate heat exchangers is very important, but many friends do not know how to choose. According to the differences in user needs, plate heat exchangers are divided into multiple models and specifications, so how to choose a plate heat exchanger that suits you? Today JOYO will share in detail from the following three aspects.
The selection of plate heat exchanger is mainly based on these three aspects: plate type selection, pressure drop check, flow channel and process selection.
(1) Board type selection
The plate type or corrugated type is customized according to the application place of the plate heat exchanger, and the brazed plate heat exchanger or the detachable heat exchanger is selected according to the temperature and pressure of the fluid. When the flow rate is large and the pressure drop is small, the plate type with low resistance can be selected, and vice versa. When choosing a plate type, you cannot choose a small plate area, because too many plates will cause the flow velocity between the plates to be too small, which will affect the heat transfer efficiency.
(2) Pressure drop check
When selecting the plate heat exchanger, there are also certain regulations on the pressure. During the pressure drop check, if the check pressure drop exceeds the allowable pressure drop, the selection and calculation will be performed again until the process standard is stopped.
(3) Selection of runners and processes
In the plate heat exchanger, the medium circulation channel formed between two adjacent plates is called a flow channel. The process refers to a set of parallel channels with the same flow direction of the medium inside the heat exchanger. Therefore, when the plate heat exchanger is selected, the process composition method is calculated based on the fluid resistance and heat exchange. In the case of ensuring that the process requirements can be met, try to make the convective heat transfer coefficients in the hot and cold runners close to or equal to each other in order to achieve the best heat transfer effect. Process selection: When the flow rate on one side is small, follow the multi-process layout. When the medium has a large temperature difference or high temperature, multiple processes can also be adopted.
When selecting the plate heat exchanger, you must pay attention to four points:
1. The flow rate at the fluid interface on the side where the temperature difference is small should not be too high.
2. When selecting plates, the area should not be too small.
3. Try to choose the side with the smaller heat transfer coefficient to get a larger flow rate.
4. For large flow and small allowable pressure drop, choose a version with low resistance.
The above are the important aspects and precautions for the selection of plate heat exchangers. You can refer to them according to your own situation. If you are interested in plate heat exchangers but don’t know how to select, please click on YOJO’s website. Jiangsu YOJO is a manufacturer of plate heat exchangers, with various functions of plate heat exchangers and heat exchange units for you to choose from.
Tag:plate heat exchanger selection,brazed plate heat exchanger,plate heat exchanger manufacturer
