3d Sph Simulation of Wave Interaction Between Wecs: Towards Optimum Wave Power Absorption in Wave Farms

2021 ◽  
Author(s):  
Sasikala Narasimman ◽  
S A Sannasiraj ◽  
Richard Manasseh
Keyword(s):  
Wave Interaction ◽  
Wave Power ◽  
Power Absorption ◽  
Sph Simulation

Comparison of the performance of oscillating water column devices based on arrangements of water columns

2020 ◽  
Vol 14 (3) ◽  
pp. 7082-7093
Author(s):  
Jahirwan Ut Jasron ◽  
Sudjito Soeparmani ◽  
Lilis Yuliati ◽  
Djarot B. Darmadi
Keyword(s):  
Wave Propagation ◽  
Water Column ◽  
Water Depth ◽  
Graphical Form ◽  
Wave Power ◽  
Oscillating Water Column ◽  
Power Absorption ◽  
Water Columns ◽  
Single Column ◽  
Parallel Arrangement

The hydrodynamic performance of oscillating water column (OWC) depends on the depth of the water, the size of the water column and its arrangement, which affects the oscillation of the water surface in the column. An experimental method was conducted by testing 4 water depths with wave periods of 1-3 s. All data recorded by the sensor is then processed and presented in graphical form. The research focused on analyzing the difference in wave power absorption capabilities of the three geometric types of OWC based on arrangements of water columns. The OWC devices designed as single water column, the double water column in a series arrangement which was perpendicular to the direction of wave propagation, and double water column in which the arrangement of columns was parallel to the direction of wave propagation. This paper discussed several factors affecting the amount of power absorbed by the device. The factors are the ratio of water depth in its relation to wavelength (kh) and the inlet openings ratio (c/h) of the devices. The test results show that if the water depth increases in the range of kh 0.7 to 0.9, then the performance of the double chamber oscillating water column (DCOWC) device is better than the single chamber oscillating water column (SCOWC) device with maximum efficiency for the parallel arrangement 22,4%, series arrangement 20.8% and single column 20.7%. However, when referring to c/h, the maximum energy absorption efficiency for a single column is 27.7%, double column series arrangement is 23.2%, and double column parallel arrangement is 29.5%. Based on the results of the analysis, DCOWC devices in parallel arrangement showed the ability to absorb better wave power in a broader range of wave frequencies. The best wave of power absorption in the three testing models occurred in the wave period T = 1.3 seconds.

scholarly journals Wave power absorption by a submerged balloon fixed to the sea bed

2016 ◽  
Vol 10 (10) ◽  
pp. 1461-1467 ◽  
Author(s):  
Adi Kurniawan ◽  
Deborah Greaves
Keyword(s):  
Wave Power ◽  
Power Absorption ◽  
Sea Bed

Expected Values of Wave Power Absorption Around the Japanese Islands Using OWC Types With Projecting Walls

2011 ◽  
Author(s):  
Tomoki Ikoma ◽  
Hiroyuki Osawa ◽  
Koichi Masuda ◽  
Hiisaaki Maeda
Keyword(s):  
Resonance Frequency ◽  
Performance Improvement ◽  
Standing Waves ◽  
Wave Power ◽  
Basic System ◽  
Oscillating Water Column ◽  
Power Absorption ◽  
Wide Range ◽  
Expected Values ◽  
Japanese Islands

This paper describes performance improvement of wave power absorption by using a new concept. Basic system proposed is an oscillating water column (OWC) type. An artificial harbor surrounded by projecting walls is installed. The type is called as PW-OWC in this paper. Standing waves occur in the artificial harbor, the absorbing device consequently has a resonance frequency differing from that of OWC. From the effect, the system is able to absorb wave power in very wide range of the wave frequency. From the experimental results, PW-OWC types are very good performance of wave power absorption comparing with conventional OWC types. In addition, the performance of the PW-OWC type is insensibility to the nozzle ratio of an orifice. The performance can be easily improved by installing the harbor part even if the performance of a base OWC device is not good. Finally, we investigate the expected values of acquirable wave power in not only a year but also every season. The expected values of PW-OWC types are greater than that of conventional OWC ones in seas around the Japanese islands.

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