Pengaruh Resonansi Terhadap Perubahan Efisiensi Perangkat Oscillating Water Column (OWC)
Jahirwan Ut Jasron
Abstrak
Oscillating water column (OWC) merupakan jenis konverter energi gelombang yang paling menjanjikan untuk diaplikasikan karena struktur mekaniknya yang sederhana. Untuk menghasilkan efisiensi konversi energi yang maksimal frekuensi gelombang insiden dan frekuensi alamiah struktur perangkat harus beresonansi. Dalam tulisan ini dibahas beberapa faktor penyebab terjadinya resonansi seperti periode gelombang insiden dan perbandingan panjang dinding depan yang terendam dengan panjang bukaan saluran masuk (a/c) dan efeknya terhadap efisiensi OWC. Hasil pengujian menjelaskan bahwa terjadi kondisi resonansi yang pada rasio perbandingan a/c sebesar 0,67 pada periode gelombang 1,3 s menghasilkan efisiensi maksimum sebesar 24,13 %
##plugins.generic.usageStats.downloads##
Referensi
[2]. P. Pinson, G. Reikard, and J. R. Bidlot, “Probabilistic forecasting of the wave energy flux,” Appl. Energy, vol. 93, pp. 364–370, 2012.
[3]. T. Murakami, Y. Imai, S. Nagata, M. Takao, and T. Setoguchi, “Experimental research on primary and secondary conversion efficiencies in an oscillatingwater column-type wave energy converter,” Sustain., vol. 8, no. 8, 2016.
[4]. A. F. d. O. Falcão, “Wave energy utilization: A review of the technologies,” Renew. Sustain. Energy Rev., vol. 14, no. 3, pp. 899–918, 2010.
[5]. Y. M. C. Delauré and A. Lewis, “3D hydrodynamic modelling of fixed oscillating water column wave power plant by a boundary element methods,” Ocean Eng., vol. 30, no. 3, pp. 309–330, 2003.
[6]. A. Iturrioz, R. Guanche, J. A. Armesto, M. A. Alves, C. Vidal, and I. J. Losada, “Time-domain modeling of a fixed detached oscillating water column towards a floating multi-chamber device,” Ocean Eng., vol. 76, pp. 65–74, 2014.
[7]. E. G. Bautista, F. Méndez, and O. Bautista, “Numerical Predictions of the Generated Work in an Air-Compression Chamber Driven by an Oscillating Water Column,” pp. 7–16, 2009.
[8]. J. R. Nader, S. P. Zhu, and P. Cooper, “Hydrodynamic and energetic properties of a finite array of fixed oscillating water column wave energy converters,” Ocean Eng., vol. 88, pp. 131–148, 2014.
[9]. S. Patel, K. Ram, and M. R. Ahmed, “Effect of partial blockage of air duct outlet on performance of OWC device,” J. Cent. South Univ. Technol. (English Ed., vol. 19, no. 3, pp. 748–754, 2012.
[10]. S. John Ashlin, V. Sundar, and S. A. Sannasiraj, “Effects of bottom profile of an oscillating water column device on its hydrodynamic characteristics,” Renew. Energy, vol. 96, pp. 341–353, 2016.
[11]. C. Y. Chang, F. N. F. Chou, Y. Y. Chen, Y. C. Hsieh, and C. T. Chang, “Analytical and experimental investigation of hydrodynamic performance and chamber optimization of oscillating water column system,” Energy, vol. 113, pp. 597–614, 2016.
[12]. D. Z. Ning, R. Q. Wang, Q. P. Zou, and B. Teng, “An experimental investigation of hydrodynamics of a fixed OWC Wave Energy Converter,” Appl. Energy, vol. 168, pp. 636–648, 2016.
[13]. D. Z. Ning, J. Shi, Q. P. Zou, and B. Teng, “Investigation of hydrodynamic performance of an OWC (oscillating water column) wave energy device using a fully nonlinear HOBEM (higher-order boundary element method),” Energy, vol. 83, pp. 177–188, 2015.
[14]. T. Vyzikas, S. Deshoulières, M. Barton, O. Giroux, D. Greaves, and D. Simmonds, “Experimental investigation of different geometries of fixed oscillating water column devices,” Renew. Energy, vol. 104, pp. 248–258, 2017.
[15]. P. Boccotti, “Comparison between a U-OWC and a conventional OWC,” Ocean Eng., vol. 34, no. 5–6, pp. 799–805, 2007.
[16]. F. Mahnamfar and A. Altunkaynak, “Comparison of numerical and experimental analyses for optimizing the geometry of OWC systems,” Ocean Eng., vol. 130, no. December 2016, pp. 10–24, 2017.
[17]. R. quan Wang, D. zhi Ning, C. wei Zhang, Q. ping Zou, and Z. Liu, “Nonlinear and viscous effects on the hydrodynamic performance of a fixed OWC wave energy converter,” Coast. Eng., vol. 131, no. January 2017, pp. 42–50, 2018.
[18]. B. Bouali and S. Larbi, “Contribution to the geometry optimization of an oscillating water column wave energy converter,” Energy Procedia, vol. 36, pp. 565–573, 2013.
[19]. K. Rezanejad, J. Bhattacharjee, and C. Guedes Soares, “Analytical and numerical study of dual-chamber oscillating water columns on stepped bottom,” Renew. Energy, vol. 75, pp. 272–282, 2015.
[20]. K. Rezanejad and C. Guedes Soares, “Enhancing the primary efficiency of an oscillating water column wave energy converter based on a dual-mass system analogy,” Renew. Energy, vol. 123, pp. 730–747, 2018.
[21]. M. Iino, T. Miyazaki, H. Segawa, and M. Iida, “Effect of inclination on oscillation characteristics of an oscillating water column wave energy converter,” Ocean Eng., vol. 116, pp. 226–235, 2016.
[22]. A. Çelik and A. Altunkaynak, “Experimental and analytical investigation on chamber water surface fluctuations and motion behaviours of water column type wave energy converter,” Ocean Eng., vol. 150, no. December 2017, pp. 209–220, 2018.