Under the same heat load, the heat transfer coefficient of the BR-40 plate heat exchanger is typically higher than that of a shell-and-tube heat exchanger, thanks to the turbulence-promoting effect created by the corrugated plates. Taking water-to-water heat exchange as an example, when the flow velocity is controlled at 0.3–0.6 m/s, the overall heat transfer coefficient can reach 3000–6000 W/(m²·K), while shell-and-tube units under similar conditions mostly fall within the range of 1000–3000 W/(m²·K). For technical engineers, this means that to achieve the same heat exchange duty, the heat transfer area of the BR-40 can be significantly reduced, with corresponding reductions in equipment footprint and metal consumption. However, it should be noted that plate structures are more sensitive to pressure drop, and the allowable pressure drop should be input as an independent constraint in the selection calculation during design.
Plate materials are typically 304 or 316L stainless steel. If the media contain chloride ions or strongly corrosive components, the use of titanium or Hastelloy should be evaluated. Gasket material must be determined based on the complete composition, concentration, operating temperature, and whether particulate matter is present in the media. Common options include nitrile rubber, EPDM, fluororubber, etc. Technical engineers should provide the inlet and outlet temperatures, flow rates, and physical property parameters of the media on both the hot and cold sides to calculate the Reynolds number and heat transfer coefficient, avoiding selection deviations caused by missing physical property data.
The BR-40 adopts a frame-type structure, and the plate pack can be disassembled via clamping bolts. When reserving maintenance space, it is recommended to leave a passage on each side of the equipment of no less than 1.2 times the plate length. For media containing particulate matter, a filter should be installed before the inlet, with filtration precision determined by the plate channel spacing, typically no less than 1 mm. The replacement cycle of sealing gaskets is related to media temperature and pressure fluctuation frequency. Technical engineers can request the upper operating temperature limit and pressure resistance range of the gasket material from the supplier during the selection stage and incorporate them into the preventive maintenance plan.
Procurement personnel should provide the supplier with media corrosiveness, temperature and flow rate, allowable pressure drop, and installation and maintenance requirements together, and technical personnel should complete the selection calculation, which can effectively reduce the risk of leakage and pressure drop after commissioning. Recommended parameters to provide include: hot side inlet and outlet temperatures, cold side inlet and outlet temperatures, flow rates on both sides, media composition and concentration, operating pressure, allowable pressure drop, and port orientation and dimensions. If the media contain particulate matter, the particle size distribution and content should also be specified.
