Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : November 08, 2021 - November 10, 2021
Recently, renewable energy has been attracting attention as a clean energy due to concerns about global warming. Among them, we focused on pico hydroelectric power generation, which can generate 1kW-100W. We aim to realize an in-line compact hydroturbine capable of generating 100 [W] with a flow rate of about 3 [l / s]. It is requested that the hydroturbine be a small size and have high performance. Therefore, we adopted contra-rotating rotors, which can be expected to achieve miniaturization and high performance. However, when the rotors become smaller, the output power of conventional contra rotating rotors, which are composed of axial flow rotors, is low. In order to achieve small size, high performance and high output power simultaneously, we propose a new type of contra-rotating rotors, which are composed of a hybrid rotor and a centrifugal rotor. The hybrid rotor consisted of an axial flow rotor and a mixed flow rotor. However, the performance of hybrid rotors tended to be low. Therefore, we focused on the deflection angle and the number of blades of each rotor. In this study, the feasibility of an in-line compact hydroturbine capable of generating 100 [W] at a flow rate of 3 [l / s] was examined from the results obtained from numerical fluid analysis.
