Polar 8 Model

[JK]

Tank model escorting bulker tank model

[JK]

The ship that I posted the sea chest grid has huge inner and outer sea chests fitted on both sides of the ship. There are (at least) 100 plates fitted in 2 plate coolers. The SW discharge from them is directed to either the inner or outer sea chests by pneumatic control valves. In a pinch you could draw from the fore peak tk.

[Merlyn]

Is this some kind of heat exchanger here or is it a waste heat system exhausting into the sea chest ? Baffles owing to its size maybe to prevent surging? Seems really specialised and so very different to the norm. I read that it can cause serious problems in the ice when under way? So different.

[Merlyn]

Well I reckon it needs a Serpent thro these tanks T' eed off of one or two mains/ gensets ?

[Big Pete]

The hot Sea Water water from the coolers/heat exchangers is re-circulated into the Sea Boxes to stop overcooling of the Fresh Water and also melt the ice in the Sea Boxes and sea Strainers, so that the flow isn't completely blocked.
BP

[JK]

In an automatic system , the overboard discharge valve is closed and the returns are directed either to the seabay or the open sea chest by an regulating valve. I always kept my seabay temperatures 20-25*C, if the temp goes above, the valve directs the returns to the sea chest.
The seabay is usually a frame space width at minimum, across the width of the enginroom.

[Merlyn]

From what I can see of the ship in the photos seems that the hull is all the same colour all over? What about A/F? Do you use TBT over there or is it banned? Seems you have a salt water swimming pool in the engineroom bilges, must be huge. What about John 1's sea suction arrangement? Was it different to your ice going ships ? From what little I can glean about it crew error seems to be a major factor together with the skipper holding off for a tug. I wonder how these cruise ships going in the ice fare with this specialist sea suction arrangements?