| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent a decrease in generation efficiency of a water turbine generator.SOLUTION: The water turbine generator A in which a water turbine 3 is disposed in a case 1 is submerged into water. The water turbine 3 is rotated by a flow of water flowing into the case 1 from an upstream opening part 2a and flowing outside of the case 1 from a downstream opening part 2b. There is no water pressure that obstructs rotation of the water turbine 3 due to a presence of an air layer 14 in the case 1 and exposure of an upper part of the water turbine 3 into the air layer 14, thereby preventing a decrease in generation efficiency.</p> |
