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@cybergibbons | |||||
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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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Cybergibbons! (Project Zero Hounslow)
@cybergibbons
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4. sij |
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Wow, big difference!
But, it gets worse.
Those reefer positions all need power.
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Cybergibbons! (Project Zero Hounslow)
@cybergibbons
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4. sij |
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We used to factor around 4kW for a reefer... so that would be around 4MW total. Easy!
Problem is, bananas are not average.
Most frozen cargo is taken onboard frozen. It doesn't take much power to keep it frozen at -21degC
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Cybergibbons! (Project Zero Hounslow)
@cybergibbons
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4. sij |
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Bananas are different though - they are often packed warm, and brought directly to the ship.
They are also kept at +14degC.
This means the refrigeration needs to work harder.
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Cybergibbons! (Project Zero Hounslow)
@cybergibbons
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4. sij |
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We are now looking at as much as 20kW to cool that container when it comes onboard, and 8kW to maintain the temperature.
We've jumped to 8MW at least!
That's changed what you are doing in the engine room.
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Cybergibbons! (Project Zero Hounslow)
@cybergibbons
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4. sij |
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Each of the 5 generators on the Emma Maersk is around 4MW.
You are now running 3 generators just to keep the ship running in port!
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Cybergibbons! (Project Zero Hounslow)
@cybergibbons
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4. sij |
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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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Cybergibbons! (Project Zero Hounslow)
@cybergibbons
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4. sij |
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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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Cybergibbons! (Project Zero Hounslow)
@cybergibbons
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4. sij |
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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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Cybergibbons! (Project Zero Hounslow)
@cybergibbons
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4. sij |
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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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Cybergibbons! (Project Zero Hounslow)
@cybergibbons
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4. sij |
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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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Cybergibbons! (Project Zero Hounslow)
@cybergibbons
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5. sij |
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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:
twitter.com/cybergibbons/s…
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RealGene☣️
@RealGene
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5. sij |
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Now do a C-5A Galaxy full of ping-pong balls.
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Cybergibbons! (Project Zero Hounslow)
@cybergibbons
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5. sij |
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I have never worked on a C-5A and the last time I saw ping-pong ball storage was in Pattaya.
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Bernd aka QP
@BERNDakaQP
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5. velj |
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Dear @cybergibbons i have to correct you there.
1)Emma Maersk is no longer the biggest Containership in the world. Latest since 2013 when the triple E class was launched with 18270 TEU and 1800 reefer plugs. And 2019 Megamax 24 with more than 2k reefer plugs.
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Bernd aka QP
@BERNDakaQP
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5. velj |
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@cybergibbons
2) The auxiliary power of a vessel is calculated to support all reefer plugs plus cargo hold ventilation.
3)The container number does not necessarily refere to 20' units. The number or reefer plugs is important.
4) You barely transport 20' reefers, mostly 40'
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SwiftOnSecurity
@SwiftOnSecurity
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5. sij |
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Bananas as a Service
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Chris Cardinal
@chriscardinal
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5. sij |
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Bananas are possibly the most insanely complicated and crazy supply chain challenge on the planet. And they are the #1 item sold in grocery stores. But they also have the HIGHEST standard deviation from predictability if a given person-who-bananas will continue banana-ing.
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Chris Bennett #FBPE
@DrChrisBennett
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5. sij |
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It just blows my mind that the dominant strain of bananas was bred/developed in... Derbyshire.
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🌻 𝙼𝚎𝚊𝚍𝚘𝚠 0x1338 𝙴𝚕𝚕𝚒𝚜 🌻
@notameadow
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4. sij |
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Nerd.
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Zack Whittaker
@zackwhittaker
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5. sij |
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fuckin nerd.
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