Actually you don’t even need a mechanical compressor. If you know how a propane fridge works, they boil an Ammonia mixture until it becomes a gas, it‘s condense

Actually you don’t even need a mechanical compressor. If you know how a propane fridge works, they boil an Ammonia mixture until it becomes a gas, it‘s condensed back into a liquid, and voila, refrigeration. With the right materials you could use thermal solar panels to build a silent air conditioner just as easily as a heater with no moving parts, in theory. Here's an old video on the principles behind it (https://www.youtube.com/watch?v=KDPgGDCdAo4 https://www.youtube.com/watch?v=KDPgGDCdAo4).