Modeling the Buoyancy System of a Wave Energy Power Plant

2009 ◽  
pp. 221-230
Author(s):  
Tom Søndergaard Pedersen ◽  
Kirsten Mølgaard Nielsen
Keyword(s):  
Power Plant ◽  
Wave Energy

Design and performance analysis of impulse turbine for a wave energy power plant

2004 ◽  
Vol 29 (1) ◽  
pp. 13-36 ◽  
Author(s):  
A. Thakker ◽  
F. Hourigan ◽  
T. S. Dhanasekaran ◽  
M. El. Hemry ◽  
Z. Usmani ◽  
...  
Keyword(s):  
Power Plant ◽  
Performance Analysis ◽  
Wave Energy ◽  
Impulse Turbine ◽  
And Performance

A Comparison of Biradial and Wells Air Turbines on the Mutriku Breakwater OWC Wave Power Plant

2017 ◽  
Author(s):  
J. C. C. Henriques ◽  
W. Sheng ◽  
A. F. O. Falcão ◽  
L. M. C. Gato
Keyword(s):  
Power Plant ◽  
Wave Energy ◽  
Time Domain ◽  
Guide Vane ◽  
Basque Country ◽  
Domain Model ◽  
Wave Power ◽  
Wells Turbine ◽  
Sharp Drop ◽  
Demonstration Site

The Mutriku breakwater wave power plant is located in the Bay of Biscay, in Basque Country, Spain. The plant is based on the oscillating water column (OWC) principle and comprises 16 air chambers, each of them equipped with a Wells turbine coupled to an electrical generator with a rated power of 18.5 kW. The IDMEC/IST Wave Energy Group is developing a novel self-rectifying biradial turbine that aims to overcome several limitations of the Wells turbine, namely the sharp drop in efficiency above a critical flow rate. The new turbine is symmetrical with respect to a mid-plane perpendicular to the axis of rotation. The rotor is surrounded by a pair of radial-flow guide vane rows. Each guide vane row is connected to the rotor by an axisymmetric duct whose walls are flat discs. In the framework of the “OPERA” European H2020 Project, the new biradial turbine will be tested at Mutriku and later will be installed and tested on a floating OWC wave energy converter — the OCEANTEC Marmok-5’s — to be deployed at BiMEP demonstration site in September of 2017. The aim of the present paper is to perform critical comparisons of the performance of the new biradial and the Wells turbine that is presently installed at Mutriku. This is based on results from a time-domain numerical model. For the purpose, a new hydrodynamic frequency domain model of the power plant was developed using the well know WAMIT software package. This was used to build a time-domain model based on the Cummins approach.

scholarly journals Evaluation of Wave Energy Location by Using an Integrated MCDM Approach

Energies ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 1840
Author(s):  
Chia-Nan Wang ◽  
Yih-Tzoo Chen ◽  
Chun-Chun Tung
Keyword(s):  
Decision Making ◽  
Power Plant ◽  
Wave Energy ◽  
Energy Demand ◽  
Fossil Fuel ◽  
Negative Impact ◽  
Selection Process ◽  
Energy Resource ◽  
Renewable Energy Resources ◽  
Expert Interview

In recent years, sudden global energy demand has led to the gradual exhaustion of fossil fuel, the world’s main energy resource. With the negative impact of fossil fuel on the environment, governments and organizations have increased R&D funding on renewable energy resources such as solar and wave energy. Vietnam has a great potential for developing wave energy projects owing to the presence of a long coastline and vast ocean. Choosing an optimal location for wave-based power plant projects is a multicriteria decision that requires understanding the quantitative and qualitative elements for assessing the balance of factors when trying to reach the most accurate result. This study proposes a multi-criteria decision-making (MCDM) model, fuzzy-analytic hierarchical process (FAHP), and weighted aggregated sum product assessment (WASPAS) in evaluating potential wave energy stations at the Vietnamese coastline. The authors identify all criteria and sub-criteria affecting the wave power plant location selection process through literature review and expert interview. Selection criteria include wave height, the distance between two waves, number of waves, wind speed, wind duration, ocean depth, turbulence, water quality, coastal erosion, shipping density, protection laws, labor resources, safety conditions, and other related factors. FAHP was used to determining the weights of the identified criteria in the first stage of this study. Finally, the WASPAS model was employed to rank all the alternatives involved in making an effective decision. This study aimed to develop a tool to enhance decision-making when solving fuzzy multi-criteria problems. We propose a real-world model for the effectiveness of the proposed model.

A Decade of Wave Power Development in India—The Challenges

2002 ◽  
Vol 36 (4) ◽  
pp. 59-73 ◽  
Author(s):  
S. Neelamani
Keyword(s):  
Power Plant ◽  
Wave Energy ◽  
Research Effort ◽  
Wave Force ◽  
Wave Power ◽  
Nicobar Island ◽  
Model Studies ◽  
Pilot Wave ◽  
Kerala State ◽  
The Stability

Wave energy research in India started in 1984. Six years of research by the Indian wave energy group culminated in the installation of a 150 kW capacity pilot wave power plant in Vizhinjam, off Trivandrum in the Kerala state, in the Arabian Sea during 1990 (Figure 1). The problems encountered during the research, construction and installation directed the group to continue the research effort. The structural configuration of the caisson has changed considerably so that it has sufficient floating stability during towing, enough space for sand ballasting to increase the stability of the caisson against horizontal sliding and overturning and sufficient space at the rear of the caisson for berthing vessels (Figures 2 and 3). After the installation of a wave power caisson of 150 kW off Trivandrum, further attention was focused on a 1 to 2 MW wave power plant for sites, where new breakwaters for harbors is envisaged (Thangassery Harbour in the West Coast of India (Figure 4) and Mus Bay in Car Nicobar Islands (Figure 5) in Bay of Bengal). Optimum center to center spacing between the caissons was determined based on physical model studies. Further research was carried out to improve the wave to pneumatic efficiency by changing the harbor configuration. Techniques to reduce the wave force on the caisson were also simultaneously studied. The wave power economics is site specific. Two sites (Thangassery in Kerala and Mus bay in Car Nicobar Island) were selected to analyze the wave power economics. Wave power is not likely to become economical in the near future. A continued research effort in the research is very important in order to improve the efficiency of wave power conversion and reduce the cost of construction. A decade of experience (1986 to 1996) in wave power research is presented in this paper.

A Sea Trial of Wave Power Plant With Impulse Turbine

2008 ◽  
Author(s):  
Manabu Takao ◽  
Eiji Sato ◽  
Shuichi Nagata ◽  
Kazutaka Toyota ◽  
Toshiaki Setoguchi
Keyword(s):  
Power Plant ◽  
Energy Conversion ◽  
Wave Energy ◽  
Rotational Speed ◽  
Guide Vane ◽  
Wave Power ◽  
Wave Energy Conversion ◽  
Wells Turbine ◽  
Impulse Turbine ◽  
Sea Trial

A sea trial of wave power plant using an impulse turbine with coreless generator has been carried out at Niigata-nishi Port, in order to demonstrate usefulness of the turbine for wave energy conversion. Oscillating water column (OWC) based wave power plant has been installed at the side of a breakwater and has an air chamber with a sectional area of 4 m2 (= 2m × 2m). The impulse turbine used in the sea trial has fixed guide vanes both upstream and downstream, and these geometries are symmetrical with respect to the rotor centerline in order to rotate in a single direction in bi-directional airflow generated by OWC. The turbine is operated at lower rotational speed in comparison with conventional turbines. The rotor has a tip diameter of 458 mm, a hub-to-tip ratio of 0.7, a tip clearance of 1 mm, a chord length of 82.8 mm and a solidity of 2.0. The guide vane with chord length of 107.4 mm is symmetrically installed at the distance of 30.7 mm downstream and upstream of the rotor. The guide vane has a solidity of 2.27, a thickness ratio of 0.0279, a guide vane setting angle of 30° and a camber angle of 60°. The generator is coreless type and can generate electricity at lower rotational speed in comparison with conventional generator. The rated and maximum powers of the generator are 450 W and 880 W respectively. The experimental data obtained in the sea trial of wave power plant with the impulse turbine having coreless generator was compared to these of Wells turbine which is the mainstream of the turbine for wave energy conversion. As a result, total efficiency of the plant using the impulse turbine was higher than that of Wells turbine.

scholarly journals PEMILIHAN TIPE PEMBANGKIT LISTRIK TENAGA GELOMBANG LAUT TIPE PELAMPUNG DI PANTAI SALUBOMBA KABUPATEN DONGGALA

Foristek ◽  
2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Setiyawan Setiawan ◽  
Yuli Asmi Rahman ◽  
Muhammad Sarjan ◽  
Nurhani Amin
Keyword(s):  
Power Plant ◽  
Data Collection ◽  
Wave Energy ◽  
Rapid Development ◽  
Secondary Data ◽  
Wave Power ◽  
Land Area ◽  
Wave Forecasting ◽  
Central Sulawesi ◽  
Sea Wave

Indonesia is a country that has an area of sea three times larger than the land area. In line with the rapid development, the need for electricity is also increasing. So that Indonesia has great potential to produce alternative and environmentally friendly energy, namely Sea Wave Energy. Its continuous nature is available all the time. Many potential coastal areas in Indonesia, however, have not been utilized optimally. The purpose of this study is to see the potential of Wave Energy for electricity. For this reason, research was carried out at a location in the Central Sulawesi area, precisely in Salubomba, Central Banawa District, Donggala Regency. In this study a potential study was conducted on 3 types of PLTGL, namely Buoy, OWC, and Pasut Dam, where one will be chosen that meets the wave criteria requirements on the Beach. From the results of research, PLTGL that fulfills the requirements is the type of buoy. Data collection begins with secondary data, namely wind data from Mutiara Station. Then proceed with calculating wave forecasting using the SMB (Sverdrup Munk-Bretschneider) method. The results of this study, Salubomba beach has the potential to be built by the Buoy Type Wave Power Plant, a significant wave height of 0.52 - 3.37 meters with a ruptured depth of 3.95 meters.

Sign in / Sign up

Export Citation Format

Share Document