Unlikely that you could get much power the heat from an AC unit as the temps aren't that high. Perhaps you could run the AC's exhaust fans off of a low temp stirling.
You can uses a Stirling engine as a cryocooler, by running it in reverse, and cool your house itself directly. This is only really useful if you're trying to get to low temperatures.
You can uses a Stirling engine as a cryocooler, by running it in reverse, and cool your house itself directly. This is only really useful if you're trying to get to low temperatures.