Conceptual design for combined ocean thermal energy conversion using computational fluid dynamics and heat balance analysis

Eojin Jeon, Gyunyoung Heo, Iljin Kim, Hyungdae Kim, Hoon Jung

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

To overcome the limited efficiency of ocean thermal energy conversion (OTEC), particularly in the mid-latitudes, combined OTEC (C-OTEC) could use power extracted from the latent heat of a power plant condenser. Past research in South Korea has demonstrated the feasibility of a 10 kW C-OTEC system using R134a as a working fluid. As the next phase, a 200 kW C-OTEC demonstration facility with a thermal efficiency of greater than 3% is proposed. This paper presents the engineering design process for kW-scale C-OTEC within a 100 MW-scale thermal power plant. The design process is divided into two stages. First, to predict patterns in steam flow to a connected external evaporator with a porous medium, computational fluid dynamics are calculated. The results show a conservative margin suitable for the conceptual design. Second, an iterative heat balance simulation method simultaneously evaluates the heat balance analysis of the C-OTEC design and the thermal impact of the existing power plant. The design stages are then integrated in terms of heat transference capacity.

Original languageEnglish
Pages (from-to)7477-7494
Number of pages18
JournalInternational Journal of Energy Research
Volume44
Issue number9
DOIs
Publication statusPublished - 1 Jul 2020

Keywords

  • combined ocean thermal energy conversion
  • demonstration facility
  • flow analysis
  • heat balance analysis

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