What factors are generally considered when deciding on the fluid to be used in the tube and shell sides of a heat exchanger?

When selecting the media for the tube side and shell side, considerations should be given to the properties of the media, temperature, pressure, allowable pressure drop, scaling, and the improvement of the heat transfer coefficient. ①Media that are corrosive, toxic, subject to high temperatures or pressures, as well as those prone to scaling, should all be used in the tube side. The reason for this is that if corrosive media are used on the shell side, the material of the shell will be corroded. Therefore, allowing the medium involved in general corrosion to flow in the tube side can reduce the material requirements for the shell side ； When toxic media flow in the tube side, there are fewer chances of leakage. High temperatures and pressures in the tube side can reduce the requirements for the material used in the shell side, and scale buildup inside the tubes is easier to remove. ②Focusing on improving the overall heat transfer coefficient and making the most of the pressure drop. In the shell side, the flow cross-section and direction of the liquid are constantly changing, and baffles can be used to facilitate turbulence; turbulence is achieved when Re≥100, whereas in the tube side turbulence occurs only when Re≥10,000. Therefore, fluids with high viscosity or low flow rates, resulting in a lower Re value, are used in the shell side. Conversely, if turbulent conditions can be achieved in the tube side, it is more reasonable to arrange it on the tube side; from the perspective of pressure drop, it is also advantageous for those with a low Re value to be on the shell side. ③It is determined by the values of the heat transfer coefficients on both sides of the membrane; if there is a large difference, the side with the lower membrane heat transfer coefficient can be used for the shell side, allowing for the use of external heat transfer enhancement devices such as twisted tubes or finned tubes.

When selecting the media for the tube side and shell side, considerations should be given to the properties of the media, temperature, pressure, allowable pressure drop, scaling, and the improvement of the heat transfer coefficient. ①Media that are corrosive, toxic, subject to high temperatures or pressures, as well as those prone to scaling, should all be used in the tube side. The reason for this is that if corrosive media are used on the shell side, the material of the shell will be corroded. Therefore, allowing the medium involved in general corrosion to flow in the tube side can reduce the material requirements for the shell side ； When toxic media flow in the tube side, there are fewer chances of leakage. High temperatures and pressures in the tube side can reduce the requirements for the material used in the shell side, and scale buildup inside the tubes is easier to remove. ②Focusing on improving the overall heat transfer coefficient and making the most of the pressure drop. In the shell side, the flow cross-section and direction of the liquid are constantly changing, and baffles can be used to facilitate turbulence; turbulence is achieved when Re≥100, whereas in the tube side turbulence occurs only when Re≥10,000. Therefore, fluids with high viscosity or low flow rates, resulting in a lower Re value, are used in the shell side. Conversely, if turbulent conditions can be achieved in the tube side, it is more reasonable to arrange it on the tube side; from the perspective of pressure drop, it is also advantageous for those with a low Re value to be on the shell side. ③It is determined by the values of the heat transfer coefficients on both sides of the membrane; if there is a large difference, the side with the lower membrane heat transfer coefficient can be used for the shell side, allowing for the use of external heat transfer enhancement devices such as twisted tubes or finned tubes.

When selecting the media for the tube side and shell side, considerations should be given to the properties of the media, temperature, pressure, allowable pressure drop, scaling, and the improvement of the heat transfer coefficient. ①Media that are corrosive, toxic, subject to high temperatures or pressures, as well as those prone to scaling, should all be used in the tube side. The reason for this is that if corrosive media are used on the shell side, the material of the shell will be corroded. Therefore, allowing the medium involved in general corrosion to flow in the tube side can reduce the material requirements for the shell side ； When toxic media flow in the tube side, there are fewer chances of leakage. High temperatures and pressures in the tube side can reduce the requirements for the material used in the shell side, and scale buildup inside the tubes is easier to remove. ②Focusing on improving the overall heat transfer coefficient and making the most of the pressure drop. In the shell side, the flow cross-section and direction of the liquid are constantly changing, and baffles can be used to facilitate turbulence; turbulence is achieved when Re≥100, whereas in the tube side turbulence occurs only when Re≥10,000. Therefore, fluids with high viscosity or low flow rates, resulting in a lower Re value, are used in the shell side. Conversely, if turbulent conditions can be achieved in the tube side, it is more reasonable to arrange it on the tube side; from the perspective of pressure drop, it is also advantageous for those with a low Re value to be on the shell side. ③It is determined by the values of the heat transfer coefficients on both sides of the membrane; if there is a large difference, the side with the lower membrane heat transfer coefficient can be used for the shell side, allowing for the use of external heat transfer enhancement devices such as twisted tubes or finned tubes.

Thank you. Since the tube side, which accumulates scale so easily, is it not more likely to get clogged compared to the shell side? And it must be difficult to clean the pipe lining, right?

Pipeline media generally include those with high pressure, high temperature, dirty conditions, or corrosive and toxic properties.

When selecting the media for the tube side and shell side, considerations should be given to the properties of the media, temperature, pressure, allowable pressure drop, scaling, and the improvement of the heat transfer coefficient. ①Media that are corrosive, toxic, subject to high temperatures or pressures, as well as those prone to scaling, should all be used in the tube side. The reason for this is that if corrosive media are used on the shell side, the material of the shell will be corroded. Therefore, allowing the medium involved in general corrosion to flow in the tube side can reduce the material requirements for the shell side ； When toxic media flow in the tube side, there are fewer chances of leakage. High temperatures and pressures in the tube side can reduce the requirements for the material used in the shell side, and scale buildup inside the tubes is easier to remove. ②Focusing on improving the overall heat transfer coefficient and making the most of the pressure drop. In the shell side, the flow cross-section and direction of the liquid are constantly changing, and baffles can be used to facilitate turbulence; turbulence is achieved when Re≥100, whereas in the tube side turbulence occurs only when Re≥10,000. Therefore, fluids with high viscosity or low flow rates, resulting in a lower Re value, are used in the shell side. Conversely, if turbulent conditions can be achieved in the tube side, it is more reasonable to arrange it on the tube side; from the perspective of pressure drop, it is also advantageous for those with a low Re value to be on the shell side. ③It is determined by the values of the heat transfer coefficients on both sides of the membrane; if there is a large difference, the side with the lower membrane heat transfer coefficient can be used for the shell side, allowing for the use of external heat transfer enhancement devices such as twisted tubes or finned tubes.

The pipe train is easy to clean; once the end caps are removed, it can be thoroughly rinsed with a water gun