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Publications
Kharkeshi, B.A., Shafaghat, R., Jahanian, O., Alamian, R. and Rezanejad, K. (2022), “Experimental study on the performance of an oscillating water column by considering the interaction effects of optimal installation depth and dimensionless hydrodynamic coefficients for the Caspian Sea waves characteristics”, Ocean Engineering, Vol. 256, 111513.
In this paper, the effect of installation depth optimization on the performance of an OWC has been studied experimentally. The converter’s efficiency was considered as an objective function, and draft depth was optimized; the dimensionless coefficients, including pressure, damping, and transmitted wave, were defined to describe the hydrodynamic behavior of the system. OWC was tested for three dimensionless water draft depths for a variety range of Caspian Sea waves. The results showed that at the average draft depth OWC performs better than the others from the AEP point of view, which is estimated to generate 2059.2 MWh. Therefore, the optimal draft depth was obtained by implementing the genetic algorithm method. All tests were repeated for the optimal water draft depth. According to the results by considering the optimal value, the maximum and average efficiency increased by 25% and 10% compared to before optimization, respectively; the analysis of the hydrodynamic coefficients also showed that the pressure, damping, and transmitted wave coefficients increased by 27%, decreased by 14% and increased by 5%, respectively. Since the pressure coefficient is the most critical factor in power generation, the optimization of water draft depth significantly affects it and, consequently, the maximum efficiency.
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