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- Mar 31, 2020
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- Papillion, NE
- '18 F150, '20 MY, '24(?)CT, Maveric hybrid ordered
- Nuclear Operations Planner
1,221 degrees...I think Dids has the right of it here. These castings all appeared at the same time as if they were moved outside in bulk rather than piecemeal for cooling. Most of these castings were likely inside for quite some time and likely cooled off long before they were moved outside. For example when they did CyberRodeo they had a bunch inside the building and none outside.
They move them in and out as space is required.
Let's say you want your aluminum piece to be room temperature to prevent expansion/contraction issues when you bond it to the rest of the Cybertruck parts. What kind of heat will 100 pounds of aluminum give off while it cools?
Q=cmdT, where c is the specific heat of Aluminum. The specific heat of aluminum is 0.22 Btu/lb F and dT is the change in temperature (1221-75). So we have Q= 0.22* 100 * (1221-75)= 25,212 BTU
25,212 BTU is less than the average house's furnace output but when you have a bunch of those heating up the building, it can certainly raise your cooling needs by a lot.
Tesla has been storing the castings outside and using them regularly. It makes no sense to move castings in and out to make "room" in a building that is underutilized currently. You don't like to see parts that are going to be internal to your vehicle sitting out in the rain/weather so there must be a good reason to have them out there. Why would Tesla make castings faster than then need them? Testing production rates? Maybe. More likely, they build enough that they have time to cool down outside where your air conditioning doesn't have to counter the heat from cooling parts, open doors, limited power availability (when your electrical is provided by the temporary switch yard).
Once full power is available, you'll see them indoors with heavy venting and cooling. Till then, outside they go. Well, if the windows stay tarped, you probably won't see them indoors...