Increasing efficiency of a 33 MW OTEC in Indonesia using flat-plate solar collector for the seawater heater

Iwan Rohman Setiawan, Irwan Purnama, Abdul Halim


This paper presents a design concept of Ocean Thermal Energy Conversion (OTEC) plant built in Mamuju, West Sulawesi, with 33 MWe and 7.1% of the power capacity and efficiency, respectively. The generated electrical power and the efficiency of OTEC plant are enhanced by a simulation of a number of derived formulas. Enhancement of efficiency is performed by increasing the temperature of the warm seawater toward the evaporator from 26˚C up to 33.5˚C using a flat-plate solar collector. The simulation results show that by increasing these a water temperature up to 33.5˚C, the generated power will increase up to 144.155 MWe with the OTEC efficiency up to 9.54%, respectively. The required area of flat-plate solar collector to achieve the results is around 6.023 x 106 m2.


enhanced efficiency; OTEC plant; flat-plate solar collector; Mamuju West Sulawesi

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W. H. Avery, C. Wu, “Renewable Energy from the Ocean: A Guide to OTEC”, Oxford University Press, New York, 1994.

R. Kempener, F. Neumann, ”Ocean Thermal Energy Conversion, Technology Brief”, IRENA Ocean Energy Technology Brief 1, 2014.

A. P. Yassen, “Rancang Bangun Pembangkit Listrik Dengan Sistem Konversi Energi Panas Laut (OTEC)” (Tugas Akhir), Institut Teknologi Sepuluh November Surabaya, 2010.

P. Ahmadi et al., “Performance Assessment of a Novel Solar and Ocean Thermal Energy Conversion Based Multigeneration System for Coastal Areas”, Journal of Solar Energy Engineering, ASME, Vol. 137/011013-1, February 2015.crossref

P. Ahmadi et al., “Multi-objective optimization of an ocean thermal energy conversion system for hydrogen production”, International Journal of Hydrogen Energy. Elsivier, Volume 40, Issue 24, Pages 7601–7608, 29 June 2015.crossref

Energy Island Avaliable: island.htm [Accessed: 03 May 2016].

R. I. Setiawan, “Analisa Pengaruh Kenaikan Temperatur Permukaan Air Laut Terhadap Kestabilan Sistem Pembangkit listrik Tenaga Panas Laut”, (Master Tesis), Universitas Indonesia, 2013.

D. Achiruddin, “Strategy to Develop Indonesian Ocean Thermal Energy Conversion (OTEC)”. [online]. Avaliable: [Accessed: 03 May 2016].

A.Y. Rahman, “OTEC Ocean Sustainable Energy”, (Tugas Akhir). Institut Teknologi Bandung, 2007.

What is OTEC [Accessed: 04 May 2016].

H. Aydin, “Performance Analysis of A Closed-cycle Ocean Thermal Energy Conversion System With Solar Preheating and Superheating”, (Thesis), University of Rhode Island, 2013.

N. Yamada et al., “Thermal Efficiency Enhancement of Ocean Thermal Energy Conversion (OTEC) Using Solar Thermal Energy”, 4th International Energy Conversion Engineering Conference and Exhibit (IECEC), American Institute of Aeronautics and Astronautics, San Diego, California, 26 - 29 June 2006.crossref

E. Kusuda et al., “Performance Test of Double-stage Rankine Cycle experimental plant for OTEC”, 6th BSME International Conference on Thermal Engineering, ICTE 2014, Procedia Engineering 105, 713 – 718, 2015.crossref

Y. Matsudah et al., “Controller Design for Liquid Level Control of Separator in an OTEC Plant with Uehara Cycle Considering Disturbances”, 2015 15th International Conference on Control, Automation and Systems (ICCAS 2015), IEEE, 2015.crossref

R. H. Yeh et al., “Maximum output of an OTEC power plant”, Technical Notes, Ocean Engineering , Elsevier, 2004.crossref

A. J. Duffie, A. W. Beckman, “Solar Engineering of Thermal Processes”, John Wiley & Sons, Inc, 2013.crossref

Calculation of Solar Insolation. [Accessed: 04 May 2016]

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1. Review on marine energy program
K Abdullah
Journal of Physics: Conference Series  vol: 1469  issue: 1  first page: 012101  year: 2020  
doi: 10.1088/1742-6596/1469/1/012101