Looping water device

A looping water device comprising:

• a container comprising:
• a major tank containing water and having
• a tank opening formed in a top of the major tank;
• a datum plane;
• a tank bottom located below the datum plane;
• a differential height between the datum plane and the tank bottom being greater than or equal to 10 meters;
• and
• a water surface in the major tank approaching the datum plane;
• and
• a vacuum tube combined with the major tank, partially extending into the major tank, extending upwardly and out of the tank opening of the major tank, and being full of water, the vacuum tube having
• a lower opening located at a bottom of the vacuum tube and fluidly communicating with the major tank;
• an upper cap closing a top of the vacuum tube;
• and
• a differential height between a bottom surface of the upper cap and the datum plane being greater than or equal to 10 meters;
• a barrel body being hollow, secured inside the major tank, containing air, and having
• a discharge port disposed at a bottom of the barrel body and fluidly communicating with the major tank;
• and
• a water surface inside the barrel body and located below the air inside the barrel body;
• an inlet pipe connected to a peripheral wall of the barrel body, extending into the vacuum tube, and being filled with water, the inlet pipe having
• an inlet port disposed in and fluidly communicating with the vacuum tube and facing toward the upper cap;
• an outlet port connected to the peripheral wall of the barrel body, fluidly communicating with the barrel body, and located higher than the water surface in the barrel body;
• a length being larger than 20 meters;
• and
• a differential height between the inlet port and the outlet port of the inlet pipe being larger than 15 meters;
• and
• a switch valve connected between the inlet pipe and the barrel body and configured to open or close a passage between the inlet pipe and the barrel body.