First up, how many bananas in a container? A standard forty footer holds 20 pallets. There are maybe 6 boxes of bananas per level, 10 levels, and 100 bananas per box? 120k bananas per box.
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Worse still, the shaft generator (the thing that recovers power from the main engine) is only 8.5MW. You are now having to run extra generators. Not economical. But doable.
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So where does all that heat go from the refrigerated containers? The air. That's fine above the hatches. But what about below the hatches? Well, you need fans. And a lot of them.
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No container ship I worked on had enough below hatch ventilation to handle 100% bananas. 100 containers dumping 8kW of power under a hatch is a lot. Total guess, but I don't think you'd manage more than 75% of reefer being at full load.
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So I think at best... we have 750 * 120k = 90 Mega Bananas. Enough for everyone in the UK and me.
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How do shipping companies handle this? Well, there are actually special banana ships - they are open hatch and can easily handle the load. Anyway, hope that was fun :)
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This is what happens when you just multiply containers by how much you think is in them.
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For those of you interested in what the engine room of a container ship looks like, I posted some pictures last year:https://twitter.com/cybergibbons/status/1176182170546835456 …
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So there are generators that could power a small town, burning diesel (or more realistically gross high sulphur bunker fuel) keeping the containers cool for ~15 days at sea to supply the UK with a week's worth of bananas? I need to stop eating bananas :(
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