Measures to enhance heat transfer in reactors.

Use heat transfer oil, Daosheng RP. Heat transfer oil can be used as a heating medium as well as a cooling medium. A copper edge-scraping scraper is installed at the kettle. It depends specifically on your temperature control requirement curve.

Thank you to the friend above for the advice. I am worried that the heat transfer oil may coking in areas with high temperatures; therefore, molten salt is used in the current design. The heat release is quite intense, with an adiabatic temperature rise of over 2000.

For temperatures above 300 degrees and below 500 degrees, molten salt is still the better choice; the temperature can be controlled by adjusting the amount of salt circulating. If the heat release is too intense, it is necessary to dilute the key components in the catalyst or raw materials. As for the design of the heat removal system, it can be carried out using standard heat exchanger design methods; generally, a heat transfer coefficient of around 500 is assumed for the generation of steam from molten salt.

Going back to my friend upstairs: the materials react directly, without any catalyst; in reality, the materials are already diluted. What about the treatment of molten salt vapor? Does the friend upstairs mean to boil the molten salt? If that’s the case, its temperature would have to be higher than the appropriate reaction temperature, which would not be suitable. This post was last edited by LTY on 2008-1-23 09:32]

Reply to those on floor 5: Generate electricity, of course. ^_^ Just joking. By the way, that’s how nuclear reactors handle droplets. Hehe, if you can get liquid sodium or potassium, the heat dissipation performance will be even better! I’m very curious – what material can produce a temperature rise of over 2000 degrees?

When the reaction requires an isothermal process, the adiabatic temperature rise is merely an assumed value. The friend upstairs mentioned the nuclear power plant method – is that the heat transfer oil method you are referring to, or the molten salt method? This post was last edited by LTY on 2008-1-23 09:35]

Let’s continue the discussion; the problem hasn’t been solved yet.

Nuclear power plants do not require heat transfer oil nor molten salt. Others use liquid metals such as sodium, potassium, and lead, as well as heavy water; there are also those that use gases (at temperatures above 1000 degrees). By the way, the latest type of nuclear submarine in the Chinese Navy is of the gas-type, which is absolutely amazing! Your problem is one of speed, as well as the choice of cold and hot sources and the type of heat transfer medium to use. These have little to do with enhanced heat transfer in reactors; you might have got the direction wrong.

I checked the manual; liquid metals such as sodium, potassium, and lead have relatively high thermal conductivity. An increased flow rate can promote heat transfer, but it leads to excessive pressure drops; this is one factor to consider. Moreover, the material cannot tolerate high speeds due to the risk of explosion, and increasing the flow rate further does not necessarily have a significant positive effect on heat transfer. Although shell-and-tube reactors and shell-and-tube heat exchangers have similar shapes and structures, there are significant differences between them. The reaction temperature needs to be precisely controlled; unlike heat exchangers where there is a distinct temperature difference, the reaction occurs instantaneously, releasing a large amount of heat. If this heat is not removed promptly, it can lead to the pipes breaking, or in severe cases, an explosion. This necessitates enhanced heat transfer mechanisms, as is not possible in ordinary heat exchangers, where cooling can take place gradually along the tubes of the heat exchanger. So this is not a regular heat exchange problem; rather, it involves choosing the appropriate control and heat exchange methods (a tubular reactor is not necessarily required). Last edited by LTY on 2008-1-24 at 14:18.]

Is it a batch process or a continuous process? If batch processes are so troublesome, would it be better to switch to continuous processes? And it seems you mean that there should be both heating and cooling; a continuous process would be better.

A continuous process, without heating, only heat transfer.