Delta T? Please explain. I'm familiar with DeltaV, but pretty much all the delta T usages I have seen refer to a time interval.
Delta T (for temperature) can also refer to the delta in temperature across an object as well. One side is very hot and one side is very cold. Often used when describing problems of relative thermal expansion.
Hmm. Could a buffer (e.g. water) be used? Basically... radiate heat out of the buffer when it's cold and move heat from the device into the buffer when it's warm?
Similar reasoning (with perhaps higher focus on radiation than ∆T) applies to Mars, and is probably one of the side reasons Musk started The Boring Company.