KEPCO Journal on Electric Power and Energy

Korea Electric Power Corporation (한국전력공사)
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Experimental Study on Combined Ocean Thermal Energy Conversion with Waste Heat of Power Plant

  • Jung, Hoon (KEPCO Research Institute, Korea Electric Power Corporation) ;
  • Jo, Jongyoung (KEPCO Research Institute, Korea Electric Power Corporation) ;
  • Chang, Junsung (KEPCO Research Institute, Korea Electric Power Corporation) ;
  • Lee, Sanghyup (KEPCO Research Institute, Korea Electric Power Corporation)
  • Received : 2019.06.24
  • Accepted : 2019.10.01
  • Published : 2019.09.30
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Abstract

This work is experimental study of 10 kW specialized Combined Ocean Thermal Energy Conversion. We propose a C-OTEC technology that directly uses exhaust thermal energy from power station condensers to heat the working fluid (R134a), and tests the feasibility of such power station by designing, manufacturing, installing, and operating a 10 kW-pilot facility. Power generation status was monitored by using exhaust thermal energy from an existing power plant located on the east coast of the Korean peninsula, heat exchange with 300 kW of heat capacity, and a turbine, which can exceed enthalpy efficiency of 45%. Output of 8.5 kW at efficiency of 3.5% was monitored when the condenser temperature and seawater temperature are $29^{\circ}C$ and $7.5^{\circ}C$, respectively. The evaluation of the impact of large-capacity C-OTEC technology on power station confirmed the increased value of the technology on existing power generating equipment by improving output value and reducing hot waste water. Through the research result, the technical possibility of C-OTEC has been confirmed, and it is being conducted at 200 kW-class to gain economic feasibility. Based on the results, authors present an empirical study result on the 200 kW C-OTEC design and review the impact on power plant.

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References

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