Which has a better heat exchange performance, a spiral tube high-efficiency heat exchanger made of the same material or a shell-and-tube heat exchanger?

The heat transfer efficiency of spiral tube high-efficiency heat exchangers and shell-and-tube heat exchangers made of the same material depends on various factors, including fluid properties, flow velocity, heat transfer area, and thermal conductivity, among others. Therefore, it is impossible to generalize which has a better heat exchange effect. Based on practical conditions, in general, high-efficiency heat exchangers with spiral tubes made of the same material exhibit better heat transfer performance than shell-and-tube heat exchangers. This is because such heat exchangers have longer flow paths and multiple rotating spiral fins inside, which increase the shear force between the fluid and the wall surfaces, thereby raising the heat transfer coefficient ； At the same time, it has a large heat exchange area, which also helps improve the heat transfer efficiency. Regarding the question you raised, it is not possible to give an exact answer as to how many square meters of tubular heat exchangers are equivalent to a 20O high-efficiency heat exchanger; specific calculations require taking into account many other factors such as fluid flow rate, wall temperature, tube diameter, and so on. Different occasions require selection based on different needs. .

Both spiral tube high-efficiency heat exchangers and shell-and-tube heat exchangers have their appropriate applications. Generally speaking, under clean operating conditions, spiral tube heat exchangers exhibit higher heat transfer efficiency; whereas under dirty operating conditions, shell-and-tube heat exchangers have the advantage. The method for calculating the heat exchange area varies depending on the parameters of the heat exchanger, making it impossible to make direct comparisons. However, under normal circumstances, a 20㎡ high-efficiency heat exchanger is equivalent to a 30–40㎡ shell-and-tube heat exchanger. A specific comparison and selection are required based on the actual operating conditions, requirements, and equipment selection parameters.

This post was last edited by Jiangong Machinery - He 155892225 on May 15, 2023, at 16:33. The areas where spiral tube heat exchangers demonstrate their high thermal efficiency are as follows: 1. Steam condensation (similar to the condensation of water vapor; essentially the same process as heating water with steam). 2. Solvent recovery (in chemical production, solvents are evaporated and then condensed for recovery). 3. Condensation after pumps (condensation of gases both before and after vacuum pumps). In all these scenarios, spiral tube heat exchangers have a distinct advantage