In places, the Alaska pipe line was built on perma-frost. The engineers burried copper tubing filled with amonia gas. The amonia gas conducted the heat upward from the ground to the winter air. No moving parts. This allowed the ground to freeze deeper. In the summer, the heat would not flow in reverse. The idea was to keep the supports on frozen ground year around.
Don't really think this would be a cost effective way to keep water from freezing.