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討論區規矩與守則
5 
檢舉此篇文章
So if you want to maximize your cooling using ice then first of all don't mine it, but instead melt in place.
If you already mined some ice then put it on rails to create 20kg packets to melt them fast.
unless you have rails or something to make 20kg packets of ice that will melt in less than 50 cycles you're better off with 400kg of cool water than a blob of ice sitting in the bottom of your tank doing nothing.
but if you have mechatronics why are you still cooling your water with ice?
But nothing prevents limiting storage bins to for example 80kg and put ice there and wait for it to melt. Should happen fast enough and will provide exactly the same amount of cooling as single ice sculptre. At least untill it melts. 80kg water at 0C is of course less cooling potential than 400kg of 0C water. Depends what you want to do - cool something down in emergency mode/just get more water or do it in the most productive and optimized way.
And by the way - ice sculptres doesn't melt faster than ice tempshift plates. The latter melts almost instantly.
and if you put it in a bin then it's a building? like you said, rails get some heat transfer bonuses so that works really well.
it all depends on what you want I guess, ice sculptures are faster to build than tempshift plates. not to mention most of the time the ice either melts or warms to almost melting in the "storage" of the building before it's constructed, so it might as well be a bin with 400kg of ice in it except the ice sculpture is a 4x4 building with only 400kg mass so contacts more tiles of water and melts faster...
And if you want to talk about heat then you should use DTU units, not degrees.
So lets consider whe have a -20C ice, and we want to see for how long 400kg of it will last to prevent a coal generator from reaching 75C and overheating. For simplification let's also assume that starting temperature of the generator is also -20C and we will not include burnt coal in the calculations. Also I want to purely focus on amount of cooling potential in kDTU compated to heat created per cycle, so we will not go into specifics how to use that ice, and later water too cool down the generator itself.
So cooling potential of 400kg ice chunk is 4.179 * 400kg * 95C = 158 802 kDTU
Ice block requires 400kg of ice, but in fact for heat calculations it has only 80kg until it melts. So its kDTU equals to:
(4.179 * 80kg * 20C) + (4.179 * 400kg * 75C) = 132 056 kDTU
With these numbers the generator, which generates 9kDTU/s (5400kDTU/cycle) will overheat in 24.5 cycles in case you melt an ice sculpture and 29.4 cycles in case you melt ice chunk. That is a 20% difference and I don't see a reason why you would just throw it away.
Of course the higher target temperature the less of a difference. But on the other hand the lower the temperature then difference is more significant. So if you want to keep your plants below 30C and hypothetically assuming ( for simplification) your only heat source is that generator, then with ice chunks you will last for 15.4 cycles, but with the sculpture only 10.5 cycles. That is almost 50% difference. Again, no reason to just throw it away.
Early game I think it is quite easy to reach a total of 50kDTU/s of generated heat in total. In case our sweet spot for base temperature is 25C and ice melts at 3C then ice sculpture will provide cooling for 1.5 cycle and melting 400kg chunk for 2.5 cycles. That is almost 70% difference.
This leads to 2 conclusions:
1. Melting ice is not so powerfull as you might think and will last only for so long. At some point you need to find stable solution.
2. Melting method is actually important and can buy you more time to build permanent solutions.
when in practice the dupes carry the ice to the sculpture and then the ice sits in a 4x4 storage structure while it's being built. if the ice even lasts until it's built, it's more like -1-2C.
It takes 298 seconds to rise ice (400kg) temperature from -20C to -10C in full tile of 30C water:
https://steamcommunity.com/sharedfiles/filedetails/?id=3460469411
To rise further to -1C it takes 662 seconds:
https://steamcommunity.com/sharedfiles/filedetails/?id=3460469378
To fully melt that 400kg chunk it last in total 836 seconds:
https://steamcommunity.com/sharedfiles/filedetails/?id=3460469349
So no, normally it won't reach -1 or -2C until it's built. Dupes will deliver and build that ice block much faster ( it takes 120s for a 0 construction level dupe to build it) and you will lose some cooling potential. And since there is no difference in melting ice delivered to building site compared sitting in the water as chunk, then I still don't see a reason to waste the cooling potential.
it's not a long-term solution and the apparent losses aren't that significant.
- takes longer to melt
-dupes waste time delivering MGs of ice to the bin
if you build an ice sculpture in warm water it's cool water in like 10 seconds... and if you're not building it in warm water I'd also question what the point is.