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How to choose the type of plate heat exchanger
Source: Time: 2020-07-16 19:13:16 Hit:
The plate is an important part of the plate heat exchanger, and the equipment exchanges heat through the plate. In order to make the heat exchanger function better, the choice of version is very important. Yojo helps you determine the phe purchase selection plate.Plate type or corrugated type should be determined according to the actual needs of heat exchange occasions. For large flow rates and small pressure drops, plate heat exchangers should use low resistance plate types and vice versa.According to the pressure and temperature of the fluid, determine whether to choose detachable or brazed. When determining the type of plates, it is recommended not to choose a plate with a single plate area that is too small, so as not to generate too many plates, the flow between the plates is too small, and the heat transfer coefficient is too low. For larger plate heat exchangers, this problem should be paid more attention.
According to the specific use occasions and heat exchange requirements, determine the choice of version, so that the plate heat exchanger can have better heat exchange efficiency.
The selection design of the plate heat exchanger should include many aspects, such as the selection of the single board area, the flow direction, and the determination of the process:
1. Selection of flow velocity between plates: The flow velocity of fluid between plates affects heat transfer performance and pressure drop. The flow rate is high, the heat transfer coefficient is high, and the resistance drop is also increased; otherwise, the opposite is true.
2. Selection of veneer area: if the veneer area is too small, the number of plates is large, the area is large, and the resistance drop is reduced; on the contrary, if the veneer area is too large, the number of plates is small, the area is small, and the resistance drops Increase, but it is difficult to ensure proper flow rate between plates. Therefore, the velocity of the corner hole of the single veneer is generally about 6m/s.
3. Selection of flow direction: During single-phase heat exchange, the counterflow has an average temperature difference. Generally, in the design of the plate heat exchanger, the fluid should be arranged as counterflow as much as possible. When the fluid on both sides is in equal flow, it is counterflow; when the fluid on both sides is in unequal flow, cocurrent and counterflow appear alternately, and the average temperature difference is less than that of pure counterflow.
4. Determination of the process: when the flow rates of the fluids on both sides are roughly equal, they should be arranged in equal steps as far as possible; when the flow rates of the fluids on both sides differ greatly, the side with the small flow rate is arranged in multiple processes or the channels with different cross-sections Plate heat exchanger. In addition, when the temperature rise or temperature drop of a medium is large, multiple processes can also be used. The side where the phase transition occurs is generally a single process, and the interface mode is up and down.
BPHE Model ZL26
The selection of plate heat exchangers should consider various aspects comprehensively and select the appropriate product. Yojo has been insisting on heat exchange equipment business for many years. As a leading jiangsu heat exchanger exporter, it produces plate heat exchanger systems of various specifications and models. Plate heat exchangers have reasonable prices, stable and reliable quality, and can provide customers with product selection and perfect after-sales. service.Tag: heat exchange equipment business, phe purchase, plate heat exchanger system
