Design and Performance Test of a Shell-and-Tube Heat Exchanger and Compressor-Based Refrigerant Pump for OTEC Prototype Applications

DOI

10.2991/978-94-6463-926-1_35How to use a DOI?

Keywords

Cold Deep Sea Water; Experimental Result; Ocean Thermal Energy Conversion; Shell-And-Tube; Temperature Gradient

Abstract

The Ocean Thermal Energy Conversion (OTEC) system is an innovative renewable technology that utilizes the temperature gradient between warm surface seawater and cold deep seawater to generate electricity. A key component of the system is the shell-and-tube heat exchanger condenser, which enables efficient condensation of vaporized working fluid using cold deep-sea water. To ensure durability and corrosion resistance, materials such as titanium and stainless steel are commonly employed, supported by precise fabrication and rigorous performance testing. Experimental results demonstrated that the actual overall heat transfer coefficient achieved was 243 W/m²·K, exceeding the design value of 215.57 W/m²·K. Furthermore, a significant enthalpy change was observed at points H5 to H8, where enthalpy increased from 168.8 kJ/kg to 238.99 kJ/kg, indicating enhanced thermal energy transfer during valve operation. The combination of pump modifications and optimized heat exchanger design proved effective in improving the performance of the OTEC system, supporting the continuous and sustainable operation of the thermal cycle. This study highlights the critical role of shell-and-tube condensers in maximizing system efficiency and demonstrates the potential of OTEC as a reliable renewable energy solution, particularly for tropical regions with pronounced ocean temperature differentials.

Copyright

© 2025 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Eky Novianarenti
AU  - M. Anis Mustaghfirin
AU  - Rifqi Ridho Maulana
AU  - Aminatus Sa’diyah
AU  - Ni’matut Tamimah
AU  - Imaniah Sriwijayasih
AU  - Rikky Leonard
AU  - Prativi Khillyatul Auliya
PY  - 2025
DA  - 2025/12/31
TI  - Design and Performance Test of a Shell-and-Tube Heat Exchanger and Compressor-Based Refrigerant Pump for OTEC Prototype Applications
BT  - Proceedings of the International Conference on Applied Science and Technology on Engineering Science 2025 (iCAST-ES 2025)
PB  - Atlantis Press
SP  - 307
EP  - 316
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-926-1_35
DO  - 10.2991/978-94-6463-926-1_35
ID  - Novianarenti2025
ER  -