Heat transfer calculation for jacketed reactors
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Hello, experts. I have a question for your assistance: There is a 10,000 L reactor with a frame-type agitator operating at 63 r/min. It features an external jacket for heat exchange, and the physical properties of the liquid inside (such as ρ, μ, λ, etc.) are known. Cooling water at 20°C is to be fed into the jacket in order to reduce the temperature of the liquid from 100°C to 40°C. The diameter d1 of the reactor, the diameter d2 of the jacket, and the wall thickness d3 are all known. How to calculate the cooling water temperature at the jacket outlet, as well as the heat exchange time? My questions: 1. Where can I find the relevant calculation formulas? When convective heat transfer is involved, different operating conditions result in different heat transfer coefficients, and these are not available in the parameter tables of the calculation formulas ； 2. Can the outlet temperature be calculated without actual production? 3. I’m a beginner, so I hope that the more experienced experts will kindly provide detailed explanations. Of course, I would be extremely grateful for even the slightest bit of guidance from you. Thank you.
Does this require converting to thermal equilibrium based on specific heat? I need an expert to do the calculation; please let me know once it’s done, so I can learn more as well
Additional questions: 1. How is the Reynolds number calculated? In a reactor, it is given by Re=ρ*u*d/μ=ρ*n*d*d/μ; how is it calculated for the jacket? Should the flow velocity of the medium in the jacket be calculated based on the law of conservation of mass, using an equivalent diameter in place of d? 2. Is there any change in the calculations when the medium used is gas? Looking forward to everyone's answers.
There are designs for specialized jacketed reactors, which include calculations related to heat transfer, taking into account factors such as whether agitation is present or not; this information should be available in comprehensive books on chemical equipment design
Additional reply: The advice from above was very helpful to me; the manual is indeed quite detailed. Thank you. The scope of application of some calculation formulas does not include actual situations, or it is only somewhat similar to them; therefore, I hope someone can point out examples of solutions to heat exchange problems, so that I can gain a deeper understanding of how formulas are chosen and how to modify general formulas.
Push through on my own, I won’t give up. . .
Give it a try; I’m looking forward to the emergence of experts so that I can learn properly*
You can take a look at this post: https://bbs.hcbbs.com/thread-1225597-1-1.htm