Is there a cost effective way to move that heat to where it could be used?
Nuclear reactors can produce very high temperatures, but in most reactors the heat is moved to turbines using water. Are there ways to move the heat at the high temperatures required to melt steel? (AFAIK, even molten salt is too cold.)
People have been talking about this since at least the 1970s, but no existing reactors have high enough temperatures. There are various concepts on paper that could do it.
Nope. Nuclear isn't hot enough. Only about 315°C at the output end. Electricity, though, has no thermodynamic upper limit on what temperature can be generated.
Steelmaking takes place around 1650C. Getting up to molten steel temperatures is hard.
Yes, you could potentially use waste heat from a reactor to preheat the tundish, and maybe the scrap and ladle. Nucor preheats using natural gas to save on electricity. No need to bring everything up from room temperature on electric power. A nuclear reactor immediately adjacent to a steel caster is probably not a great idea.
I was hoping there would be something here about using Stirling engines that use decay heat, but looks like they are just using the decay heat itself and not generating electricity. The space stirling engines that NASA has worked on in a few iterations made a lot more electrical power than the older RTGs, with the tradeoff of moving components and associated issues.
It really seems like the ancients knew quite a bit. Their system for counting and for angles seems to have been really handy. And the measurement system of feet and inches was really close to what everyone had readily available.
It is. It’s mind numbing for me. I workout best when my body feels fluid with the machine (like I do on an elliptical, almost a “high” if you will)
I can never achieve this with weight training thus far, every time I try it.
Using weighted balls I’ve come semi close, the tactile feedback of the ball helps immensely to give me something to focus on, but I haven’t found a “full” workout with that as of yet, and supposedly I need heavier ones.
I like that I can do 45 minutes on an elliptical without even noticing because it’s repetitive by design. I need the same for strength training that lets me master a predefined set of things over and over
You could start with farmer's carry, if you have some free space to walk in the gym. Lift two equal weights on each side, using both hands and walk for 1 minute. Start with easy weights and increase gradually, over a period of days/weeks to a point, where lifting and walking for a minute makes you really exhausted and by the end of the minute you are ready to drop the weights (but don't!).
Edit: Just be careful of back being straight and firm, while doing it.
I remember falling off of a tall monkey bar thing like that and getting the wind knocked out of me the first time. And a lot of other equipment that I haven't seen in decades.
It would be interesting to see a cross section and what kind of variable geometry they are using to max out in the different flight regimes. I poked around and didn't see that, and I wonder if they could even publish that at this stage.
