The issue of coolant flow rate in the jacket
Thread Content
The reaction is exothermic, and there is a jacket outside the reactor. Are there any requirements regarding the flow rate of the liquid inside this jacket? Thank you!
I believe the heat released by the reaction needs to be removed; there is a value associated with this heat. There should also be requirements regarding the temperature difference between the coolant entering and leaving the jacket. Since the specific heat capacity of the coolant is known, it is possible to determine the minimum flow rate of the coolant. By taking into account other process requirements and calculating the heat transfer, the flow rate can be roughly determined
The flow rate of the coolant is known; the concern is that the flow velocity might be too high.
Is it existing equipment? If so, the flow rate is known, as well as the pipe diameter... It’s possible to calculate the flow velocity from that... Just consider the fluid as flowing within the pipeline. Generally, a flow velocity of 1.2~1.5 can be used for estimation (schools teach 2~3 M/S, but in industry, factors such as expansion and safety are taken into account, so the flow velocity is set lower)
If the flow rate is known, then the velocity can be determined. The appropriate value for the velocity can be determined by referring to the guidelines for selecting pipe diameters; for liquids with low viscosity, a velocity of 1-2 m/s is generally sufficient
It can still be calculated – just determine an equivalent flow area. If you really don’t know how, ask the person who designed the jacket to calculate the flow rate; once the flow rate is known, the velocity will be determined as well. If the flow velocity in the jacket is too high, it means the jacket is too small
Is there any relationship between the pipe diameter and the jacket diameter? Thank you very much
It doesn’t matter; the flow rate can be used as a reference
The purpose of a jacket is nothing more than to heat or cool. Don’t let the fact that it’s a jacket fool you… The principles behind fluid dynamics remain the same. For example, if you ask me about the flow velocity or flow rate in the tubes of a heat exchanger, you can calculate it using the diameter of the pipe at the inlet of the equipment, and then applying the theoretical flow velocity range of 1–2 M/S will give you an approximate idea of the flow rate. ------------------------------------------------------------------- The principles are all the same; don’t be constrained by words