Issues with the inlet and outlet of hot water heating heat exchangers
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May I ask, when hot water is used as the heat transfer medium for heat exchange, how are the inlet and outlet of the hot water arranged? Is it in from below and out from above, or in from above and out from below? Thank you!
It is sufficient for the refrigerant and the heat transfer fluid to flow in opposite directions; that is, the heat transfer fluid enters from above and exits from below, while the refrigerant enters from below and exits from above.
Under normal circumstances, the heat medium flows in at a higher level and out at a lower level
Using hot water as a heat transfer medium, a bottom-in-top-out configuration is the optimal choice； Steam *******, in from above and out from below********.
Hello； Thank you for your reply! Why is it considered the best choice? How was it analyzed?
If hot water flows through the shell side, it enters from above and exits from below; if the fluid flows through the shell side, it enters from below and exits from above. Otherwise, there will be dead zones where no flow occurs； Choose the opposite direction for the tube side and the shell side.
As a heat transfer medium, hot water should flow in from below and out from above. To fill the heat exchanger, it is not possible to consider only the water temperature, as hot water also has pressure; it is best for it to undergo convective heat exchange with the medium that needs to be heated, as this yields the highest efficiency.