Development of tin copper alloys in shell and tube evaporator heat exchanger systems in ocean thermal energy converse power plant

Authors

DOI:

https://doi.org/10.15587/1729-4061.2022.263263

Keywords:

OTEC, ORC, renewable energy, CFD simulation, Shell and Tube heat exchanger, seawater temperature, close cycle, copper-tin alloy

Abstract

A case study of the manufacture of an OTEC factory on a floating ship has been carried out using 100 MW Titanium material at a fairly expensive cost, so the OTEC system was researched using a copper-tin alloy. The behavior of the tin-copper heat exchanger between the Aspen Plus simulation and the Computational Fluid Dynamics (CFD) simulation on Shell And Tube evaporators of Bonnet Divided Flow fixed and Bonnet One-pass Shell fixed (BEM) types is investigated. The difference in temperature between water at sea level of 29 °C and water at a depth of 1000 meters at a temperature of 5 °C is assumed to produce electricity. A marine thermal energy conversion power plant is a continuous source of energy sourced from nature an evaporator heat exchanger with ammonia working fluid will produce power that can drive a turbine forwarded to a generator. The simulation results of CFD of a Bonnet Divided Flow fixed type Heat Exchanger on the hot water inlet line has a temperature of 29.9 °C, when exiting the evaporator shell the temperature decreases to 26.4 °C. At the inlet line, the working fluid of ammonia enters the evaporator at 7.9 °C and when it leaves the tube, the temperature rises to 26.3 °C. The best results of the simulation of Aspen Plus Heat Exchanger type BEM Inlet Ammonia temperature 8 °C and at CFD 7.99 °C. Meanwhile, at the ammonia outlet at 28 °C and in the CFD simulation, the ammonia outlet temperature was 28.21 °C. Aspen Plus Inlet heating water temperature is 30 °C, and in CFD simulation, the temperature is 29.99 °C. While the heating water outlet is 28 °C, and in the CFD simulation, the heating water outlet is 28.15 °C. The conclusion from the simulation results is that the BEM-type heat exchanger is very good and suitable for experimental prototyping.

Author Biographies

Mawardi Mawardi, Universitas Sumatera Utara; Universitas Al-Azhar

Doctor’s Student in Mechanical Engineering

Departement of Mechanical Engineering

Basuki Wirjosentono, Universitas Sumatera Utara

Doctor of Mathematics and Natural Sciences, Professor

Department of Chemistry

Himsar Ambarita, Universitas Sumatera Utara

Doctor of Mechanical Engineering, Professor

Department of Mechanical Engineering

Jaswar Koto, Universitas Insan Cita Indonesia

Doctor of Ocean and Aerospace, Professor, Vice-Rector for Academic Affair, Research & Development, and Digital Advancement

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Development of tin copper alloys in shell and tube evaporator heat exchanger systems in ocean thermal energy converse power plant

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Published

2022-10-30

How to Cite

Mawardi, M., Wirjosentono, B., Ambarita, H., & Koto, J. (2022). Development of tin copper alloys in shell and tube evaporator heat exchanger systems in ocean thermal energy converse power plant. Eastern-European Journal of Enterprise Technologies, 5(8(119), 37–52. https://doi.org/10.15587/1729-4061.2022.263263

Issue

Vol. 5 No. 8(119) (2022): Energy-saving technologies and equipment

Section

Energy-saving technologies and equipment

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Copyright (c) 2022 Mawardi Mawardi, Basuki Wirjosentono, Himsar Ambarita, Jaswar Koto

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