After one or two quarters of operation, the inlet-outlet temperature difference of some heat exchangers slowly narrows, while the medium flow rate remains unchanged but the pressure drop rises somewhat. Such changes are usually related to deposits on the heat exchange surface, medium scaling, or uneven flow distribution, and it is difficult to determine the cause by looking at the temperature gauge alone. For on-site operation and maintenance personnel, comparing the three data points of temperature, flow rate, and pressure drop together is more informative than focusing on any single item.
A: The medium name, flow rate, inlet temperature, outlet temperature, allowable pressure drop, and installation space need to be provided. When the medium is water, oil, air, or a neutral chemical solution, differences in physical properties directly affect the heat exchange area and flow channel form, so the medium information should be as specific as possible and not merely written as "liquid." Allowable pressure drop is an easily overlooked item; it determines the flow channel size and upper flow velocity limit, and submitting it facilitates a balance between heat exchange capacity and system resistance.
A: It is recommended to regularly record changes in inlet and outlet temperatures, medium flow rate, and pressure drop. Recording the three data points simultaneously can distinguish whether it is a change in heat source output or an increase in resistance on the heat exchange side. If the pressure drop rises while the temperature difference narrows, it mostly points to flow channel deposits; if the pressure drop remains basically stable while the temperature difference decreases, it is necessary to check whether the medium temperature or flow rate has shifted.
A: Installation space should reserve margin for inspection and disassembly, and the interface direction should avoid forming gas accumulation sections. The maintenance cycle can be determined based on the pressure drop trend, and it is not necessary to disassemble and inspect at fixed calendar intervals. The HRL-32 jacketed heat exchanger is suitable for heating or cooling media such as water, oil, air, and neutral chemical solutions, and specific parameters are subject to the confirmed model selection results.
