In HVAC plant rooms or liquid-liquid heat exchange stations in chemical processes, engineers often need to choose between plate-shell and shell-and-tube designs. The BRQ-25 plate-shell heat exchanger is a combined structure of plates and a shell, with formed plates as its heat exchange elements and an outer shell that bears pressure. When comparing it with a shell-and-tube solution, the following points are worth verifying one by one.
Point 1: The heat transfer surface arrangement differs, and the maintenance access differs accordingly. Shell-and-tube units rely on the inner walls of the tube bundle and shell-side baffling, and cleaning mostly targets the tube side; the BRQ-25 plate-shell type arranges heat exchange plates in groups, and during maintenance attention must be paid to the disassembly and assembly space for the plate packs and the conditions for reseating the sealing surfaces. Engineers should calculate the maintenance access dimensions at the solution comparison stage, rather than adjusting after on-site installation.
Point 2: The correspondence between gasket material and medium operating conditions is a key selection check. This model can be used in HVAC, chemical processes, and waste heat recovery applications. During procurement, the compatibility of medium temperature, chemical properties, and gasket material must be verified to avoid leakage caused by improper gasket selection. This point is easily overlooked in comparisons between plate-shell and shell-and-tube types: shell-and-tube units mainly use welding or flange connections, and leakage paths are relatively concentrated; plate-shell types rely on sealing between plates, and gasket compatibility directly determines operational stability.
Point 3: Pressure and temperature boundaries need to be confirmed through selection calculations. This model is suitable for liquid-liquid heat exchange applications in chemical, pharmaceutical, and HVAC systems. The working pressure and temperature range should not be applied based on experience; the results calculated from medium parameters should prevail. When comparing with a shell-and-tube solution, the pressure-bearing margins of the two structures under the same design conditions can be compared side by side, and then the suitability of the structural form can be judged.
Point 4: Different application scenarios have different priorities. Waste heat recovery applications focus on heat exchange area utilization under low temperature differences, HVAC applications focus on adjustment margin under variable conditions, and chemical processes place more emphasis on medium compatibility and sealing reliability. When comparing and selecting, engineers should list weights item by item according to the scenario, avoiding deciding the structural form based on a single parameter alone.
