Heat exchanger put into operation
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Why is it necessary to reverse the flow direction of the medium during the commissioning of a heat exchanger after it has been prepared, that is, to open the outlet valve first?
As I understand it, it is to prevent the heat exchanger from experiencing overpressure due to pressure buildup. Overpressure refers to a pressure that exceeds the maximum operating pressure of the heat exchanger itself or its design pressure. Personal opinion, for reference only!
First, it prevents pressure buildup in the heat exchanger; second, it removes water present in the heat exchanger, such as that from purging and washing processes, by releasing it from the inlet.
What would be the consequences if it were referenced from the entrance?
I personally think it’s mainly to prevent pressure buildup
Blowing and water washing are carried out from the inlet to remove the water present in the heat exchanger, preventing overpressure in the heat exchanger due to pressure buildup.