scholarly journals Discussion on Optimal Shape for Wave Power Converter Using Oscillating Water Column

2011 ◽  
Vol 23 (5) ◽  
pp. 345-357 ◽  
Author(s):  
Kwang-Ho Lee ◽  
Jung-Hyun Park ◽  
Dong-Jin Baek ◽  
Sung Cho ◽  
Do-Sam Kim
Keyword(s):  
Water Column ◽  
Power Converter ◽  
Optimal Shape ◽  
Wave Power ◽  
Oscillating Water Column

Design synthesis of oscillating water column wave energy converters: Performance matching

1997 ◽  
Vol 211 (6) ◽  
pp. 489-505 ◽  
Author(s):  
R Curran ◽  
T P Stewart ◽  
T J T Whittaker
Keyword(s):  
Water Column ◽  
Limited Range ◽  
Power Converter ◽  
Analytical Models ◽  
Wave Power ◽  
Oscillating Water Column ◽  
Wells Turbine ◽  
Design Synthesis ◽  
Wave Energy Converters ◽  
Pneumatic Power

The matching of a Wells air turbine to an oscillating water column (OWC) is addressed, with particular reference to design synthesis at the Islay prototype wave power converter. The level of damping applied by the turbine must optimize the hydraulic performance of the OWC in order to facilitate efficient conversion from wave power to pneumatic power. Furthermore, a Wells turbine is only able to convert pneumatic power to mechanical power over a limited range of flow coefficients. Therefore, the efficient operational range of the turbine must extend over a sufficient and optimal proportion of the range of flow coefficients generated by the OWC. Suitable analytical models that describe the behaviour of the system are presented and subsequently the wave conditions and conversion performance at the Islay plant are outlined in order to exemplify the design synthesis to be achieved.

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.

Wave power extraction of a heaving floating oscillating water column in a wave channel

2016 ◽  
Vol 99 ◽  
pp. 1262-1275 ◽  
Author(s):  
R.P.F. Gomes ◽  
J.C.C. Henriques ◽  
L.M.C. Gato ◽  
A.F.O. Falcão
Keyword(s):  
Water Column ◽  
Wave Power ◽  
Oscillating Water Column ◽  
Power Extraction ◽  
Wave Channel
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