Process area activity-[So it is-24] The working status determines the effect of the heat exchanger

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Seeing @goldliyang's post reminds me of something that happened when the shipyard was debugging~ There are many places on the ship that require electricity, so four diesel generators are equipped. The generators need to be equipped with cooling water pipelines and use closed fresh water pipes for cooling. The fresh water pipes exchange heat with seawater through plate heat exchangers (in a box structure) on both sides of the hull. During the equipment debugging stage, the ship was docked and it was found that the cooling effect of the generator was not good. Then, someone discovered that water vapor was rising from the side of the boat. What was going on? It turns out that the calculation environment of the heat exchanger is the driving stage of the ship. That is to say, the seawater is basically at a constant temperature, which is conducive to the heat exchange of the heat exchanger. During the commissioning phase or the stationary phase of the ship, the seawater near the ship is relatively static and does not achieve the expected heat exchange effect. What to do? During the ship docking inspection phase, a forced water circulation pipeline system was added near the plate heat exchanger (in the box structure) to ensure that the nearby seawater is relatively constant temperature to prevent the generator cooling effect from failing to meet the design requirements.