How to Select Heat Exchangers for Mold Temperature Control Machines

 Modeling temperature machineTemperature-assisted control equipment is an indispensable component in modern industrial production. It achieves long-term stability and temperature control through the intelligent coordination of the heating system, cooling system, and control system, particularly the cooling system's cooling and temperature reduction, which ensures the stable and normal operation of the equipment within the normal temperature range. The cooling system of the mold temperature machine includes cooling water inlet and outlet pipes, cooling water towers, and heat exchangers; selecting the appropriate heat exchanger is crucial. Common heat exchangers include shell-and-tube exchangers and plate exchangers. Typically, for two devices with the same function, we compare their structure, classification, and characteristics to determine when they are suitable for mold temperature machines. So, let's analyze and compare the structure, classification, and characteristics of shell-and-tube heat exchangers and plate heat exchangers.

The shell-and-tube heat exchangers and plate-type heat exchangers are completely different, each with its own unique features.

Shell-and-tube heat exchangers are composed of a shell, a bundle of heat transfer tubes, tube plates, baffles, and a tube box. They are mostly cylindrical in shape, with a bundle of tubes within the shell. Baffles are typically installed inside the shell-and-tube to greatly increase fluid flow velocity, thereby enhancing heat transfer efficiency and achieving superior thermal transfer performance.

②: Plate heat exchangers are assembled from several corrugated thin plates, pressed together with an appropriate spacing, sealed around with gaskets, and held in place with a framework and compression screws. The four corner holes form a fluid distributor and collecting conduit. Cold and hot fluids are separated and managed on each side of the plates, facilitating heat exchange as they flow through the channels.

2. Category Comparison: Shell-and-tube Heat Exchangers and Plate Heat Exchangers Offer a Wide Variety

Shell-and-tube heat exchangers are commonly categorized into fixed tube sheet heat exchangers, floating head heat exchangers, U-tube heat exchangers, and vortex heat film heat exchangers.

②: Plate heat exchangers are more categorized, including plate coolers, plate condensers, one-way plate heat exchangers, multi-directional plate heat exchangers, parallel plate heat exchangers, counterflow plate heat exchangers, and crossflow plate heat exchangers, etc.

3. Feature Comparison: Plate Heat Exchangers Offer Greater Advantages Over Shell and Tube Heat Exchangers

①: In terms of heat transfer efficiency, due to the complex flow channels formed by the inverted corrugated plates, the plate-type heat exchanger exhibits superior heat transfer performance under the same conditions compared to the shell-and-tube type.

②: In terms of space utilization, the plate heat exchanger has a highly compact structure, offering 2 to 5 times the heat exchange area per unit volume compared to shell and tube designs, while occupying only one-fifth of the space required by shell and tube heat exchangers.

③: In terms of weight, the plate thickness of plate heat exchangers is smaller, while the tube thickness of shell and tube heat exchangers is larger, making the former significantly lighter than the latter. This makes them suitable for small-scale temperature control equipment.

④: In terms of cost, under the same heat exchange surface area conditions, plate heat exchangers are significantly more economical than shell-and-tube heat exchangers, with lower overall cost.

⑤: In terms of heat loss, plate heat exchangers only have the outer shell exposed, resulting in a 1% heat dissipation loss, which generally does not require insulation. In contrast, shell-and-tube heat exchangers must be insulated with insulating cotton to ensure reduced heat loss.

⑥: In use, plate heat exchangers are sealed with gaskets and should not operate at excessive working pressures. Shell-and-tube heat exchangers do not have this concern. Additionally, plate heat exchangers have smaller passages, which can easily become blocked when handling media with larger particles.