Ice Machines Produce 60 kDTU/s of Heat???? [Oxygen Not Included]

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Gearhead Gaming

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Published on August 6, 2019 7:17:05 PM ● Video Link: https://www.youtube.com/watch?v=t_kD0IMwaDI

Game:

Oxygen Not Included (2019)

Duration: 7:18

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I placed an ice maker made out of wolframite in a vacuum and ran it for roughly 250 seconds. I fed it 30 kg of 70 C water, and at the end of the 250 seconds, that water had been cooled to 30 C. But the ice maker (which weighs 400kg) had heated itself from 20 C to 300 C.

Cooling applied to the water:

30000 * 4.179 * 40 = 5014800 (~5000 kDTU)

Heat applied to the ice machine

400000 * 0.134 * 280 = 15008000 (~15000 kDTU)

That means while the water is cooled down at a rate of 20 kDTU/s, the ice machine heats up at a rate of 60 kDTU/s, for a net heat of 40 kDTU. That's more than a polymer press.

Oh boy, something is wrong here.

EDIT: It turns out Ice Makers are really weird. Updated video here: https://www.youtube.com/watch?v=F55NF57bgQ0

It turns out that Ice Makers have a 1/5th factor applied to their heat capacity. So instead of producing 60 kDTU/s of heat, we were only producing 12 kDTU/s of heat. Which is actually LESS than expected, because in a vacuum, no "excess" heat is produced, only the normal operation heat is produced.

Under normal conditions, an Ice Maker should delete at least 4 kDTU/s of heat, and with a couple tricks discussed in the update video that amount can be increased to 8 kDTU/s or 20 kDTU/s.

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