Regarding the heat exchange sequence
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Generally, in the indirect heat exchange between two media, the cold stream exchanges heat with the cold stream, and the hot stream exchanges heat with the hot stream. But are there any situations where the cold end of the cold stream, that is, its inlet, first exchanges heat with the hot end of the hot stream, while the outlet of the cold stream exchanges heat with the outlet of the hot stream? In other words, under what circumstances is it preferable to use a co-current heat exchange method?
Our unit is equipped with counterflow heat exchange to prevent localized overheating at the high-temperature inlet end of the heat exchanger tubes.