Flow and performance characteristics of a direct drive turbine for wave power generation

A cross-flow turbine, also known as Banki turbine, is a hydraulic turbine that may be classified as an impulse turbine. It has gained interest in small and low head establishments because of its simple structure, cost effectiveness and low maintenance. The present work expands on this idea and aims...

Full description

Saved in:
Bibliographic Details
Published in:Ocean engineering 2014-05, Vol.81, p.39-49
Main Authors: Prasad, Deepak Divashkar, Ahmed, M. Rafiuddin, Lee, Young-Ho
Format: Article
Language:English
Subjects:
Applied sciences
Computational fluid dynamics
Computer simulation
Cost effectiveness
Direct drive turbine
Energy
Energy of waters: ocean thermal energy, wave and tidal energy, etc
Exact sciences and technology
Flow characteristics
Maintenance
Marine
Mathematical models
Natural energy
Ocean engineering
Primary energy conversion
Turbine power
Turbines
Wave power
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A cross-flow turbine, also known as Banki turbine, is a hydraulic turbine that may be classified as an impulse turbine. It has gained interest in small and low head establishments because of its simple structure, cost effectiveness and low maintenance. The present work expands on this idea and aims to implement a cross-flow turbine as Direct Drive Turbine (DDT) for wave power generation. Waves have enormous amount of energy which is environment-friendly, renewable and can be exploited to satisfy the energy needs. A Numerical Wave-tank (NWT) was used to simulate the waves using the commercial CFD code ANSYS-CFX. The base model was firstly studied at five different wave periods without the turbine. The highest water power (PWP) of 32.01W was recorded at T=3s. A cross-flow turbine was then incorporated and the simulation was validated at T=2s. In addition to this, the performance of the turbine at T=2.5s and T=3s at different turbine speeds was also studied. The highest turbine output power of 14W was recorded at a turbine speed of 30rpm at the wave period of 3s, giving a turbine efficiency of 55%. •A Direct Drive Turbine is used to extract energy from waves.•Experiments were conducted in a numerical wave tank.•The effects of different wave conditions and turbine are studied.•The water power with and without the turbine were estimated.•Maximum turbine power of 14W (efficiency=55%) was obtained at the wave period of 3s.
ISSN:0029-8018
1873-5258
DOI:10.1016/j.oceaneng.2014.02.019