Experimental Analysis of L-Shaped Oscillating Water Column with Horizontal Chamber Length Variations under Different Wave Periods
1Ocean Engineering Study Program, Institut Teknologi Kalimantan, Indonesia
2Mechanical Engineering Study Program, Institut Teknologi Kalimantan, Indonesia
3Directorate of Laboratory Management, Research Facilities, and Science and Technology Park, National Research and Innovation Agency, BRIN, Indonesia
4Research Center for Hydrodynamics Technology, National Research and Innovation Agency, BRIN, Indonesia
*Author to whom correspondence should be addressed:
E-mail: putridestyariani@lecturer.itk.ac.id (DLP)
E-mail: putridestyariani@lecturer.itk.ac.id (DLP)
Received: May 28, 2025 | Revised: September 10, 2025 | Accepted: December 16, 2025 | Published: March 2026
Abstract
Wave power plants using the oscillating water column (OWC) type have been implemented at full scale, with chamber geometry design variations (L-shaped OWC chamber) and including various wave periods test. The experimental study was conducted on 1:10 scale model in a glass flume (1 x 1.5 x 35) meters at the Coastal Engineering Laboratory of the National Research and Innovation Agency (BRIN). The objective is to investigate the effects of wave period and height variations on the power output of the L-OWC device, including the influence of L-OWC chamber length variations on water surface oscillation, pneumatic pressure, and air velocity in the chamber and turbine duct. The findings highlight that the input water level oscillation and period significantly impact the power output generated by the device. The water level oscillation changes in the L-OWC chamber's geometry length, affects water surface oscillation, pressure, and air velocity in the chamber and turbine duct. The highest power output was achieved with the L1 geometry rather than L2 during the test when the air was entering the chamber, generating a power output of 49.99 W and 46.91 W, respectively.
Keywords
chamber geometry; chamber length variations; l-owc; oscilating water column; wave flume experiment; wave period variation
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