Mechanical Equipment & Tool Parts

Structural and Design Excellence of Plate Fully Welded Heat Exchangers

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Jiangsu Boqini Environmental Technology Co., Ltd. is a plate fully welded heat exchanger company.

Plate fully welded heat exchangers are a testament to the ingenuity of modern engineering. Their unique plate structure and overall design features offer a combination of high thermal efficiency, compact design, and robust construction. The fully welded channels eliminate the risk of leakage, while the corrugated plates enhance heat transfer and structural integrity. The design considerations for plate fully welded heat exchangers, including the optimization of plate width and spacing, ensure that these heat exchangers can meet a wide range of thermal and hydraulic requirements. As a result, plate fully welded heat exchangers are becoming increasingly popular in industries where efficiency, reliability, and compactness are paramount.

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Unique Plate Structure

The heart of a plate fully welded heat exchanger is its corrugated square-shaped plates, which form the heat transfer core of the unit. These plates are stacked and held together by metal cover plates, tightened by bolts to ensure a secure and leak-proof assembly. The geometrical features of these plates are crucial to the heat exchanger's performance, as they determine the fluid flow channels and the heat transfer surface area.

The plates are designed with specific corrugation patterns that enhance turbulence within the fluid streams, leading to increased heat transfer coefficients. This design not only improves the thermal efficiency but also reduces the pressure drop across the heat exchanger. The corrugation also provides structural strength to the plates, allowing them to withstand high pressures without deformation.

Overall Design Features

The design of plate fully welded heat exchangers is centered around maximizing heat transfer while minimizing the physical footprint and material usage. The compact design is achieved through the use of thin, closely spaced plates that form numerous narrow flow channels. This arrangement allows for a large heat transfer area within a small volume, making plate fully welded heat exchangers highly space-efficient.

The welding of the plates to one another forms the channels for fluid flow, eliminating the need for gaskets or other sealing mechanisms that can degrade over time. This full welding approach ensures a hermetic seal, preventing any leakage of fluids and ensuring a long service life with minimal maintenance.

The design methodology for plate fully welded heat exchangers involves specifying the total surface area, plate width and type, number of passes, and total number of channels per pass. This is crucial for achieving the desired thermohydraulic performance, as the fluid velocity, which is determined by the free flow area, is directly related to the plate width and the plate spacing. By optimizing these variables, plate fully welded heat exchangers can achieve high heat transfer rates with low pressure drops.

Thermal and Hydraulic Performance

The thermal and hydraulic performance of plate fully welded heat exchangers is exceptional due to their design. The velocity of the fluid is determined by the free flow area, which depends on the plate width and the plate spacing. These two variables are essential in the design approach and are used to express the logic behind the design and the calculations involved.

The design also allows for multi-stream configurations, where a common branched stream can exchange heat through each section, or where several heat exchangers with the same plate width have a common stream passing through each section in series. This flexibility in design enables plate fully welded heat exchangers to handle multiple streams efficiently, reducing the number of units required in heat recovery networks and corresponding installation costs.

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Jiangsu Boqini Environmental Technology Co., Ltd.