[dgoodell]

The radiators don’t have to increase in size really. If it’s more efficient you don’t have to reject as much heat.

But definitely a large increase in complexity as Stirling engines are mechanical devices and thermoelectrics are solid-state. The Stirling engines can be over 25% efficient rather than like 6% for thermoelectrics.

NASA has operated a Stirling engine in a lab for 17 years so it’s feasible, at least.

[mr_toad]

Only one of 16 has lasted this long. Another lasted 12 years. I can’t find numbers for all of them.

[eternauta3k]

Got any links? I wonder what fails.