I would like to ask about the issue of uneven heating on both sides of the tube preheater
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May I ask, in a tubular air preheater where the flue gas flows through the shell side and the air flows through the tube side, why is there uneven heating on the windward and leeward sides of the tubes?
Can we draw inspiration from \"The chest is warm from the heat, but the back feels cold in the wind.\" ”That’s what it means :)
That’s what it means, but how would it be expressed in chemical terminology? Vortices are formed on the leeward side, resulting in a greater heat exchange effect on the windward side compared to that on the leeward side. I’m not sure if this is correct
I’m not sure if pursuing such issues holds any practical value; the ultimate goal is to maximize heat recovery. The design of its shape also needs to take into account various aspects of usability.
A PPT I created on various types of heat exchangers, explaining their advantages, disadvantages, and the reasons behind them, for use in training. I don’t know how to explain this problem.
Avoid it; there’s no need for an explanation. Due to the directional nature of the fluid, the installed equipment is designed to facilitate heat exchange through contact from all directions as much as possible, while also taking practicality into account. It is impossible to ignore factors such as shape, strength, and fluid resistance.
Block it with a board; don’t blow straight out.
It’s probably because the pipe arrays and the pipe paths aren’t properly distributed!
The operating environment of the air preheater determines that its tube spacing is larger than that of an air cooler, resulting in a higher heat transfer efficiency on the windward side of the heat exchange tubes compared to the leeward side