The 2MW waste heat recovery system jointly developed by Hyundai Heavy Industries and Korea Electric Power Corporation (KEPCO) using critical carbon dioxide as a working fluid has recently received the principle approval (AIP) from Lloyd's Register of Shipping (LR).
Supercritical carbon dioxide (S-CO2) is a special state of carbon dioxide by controlling the compound above its critical pressure and temperature. In this state, supercritical carbon dioxide has both liquid and gas characteristics. Since supercritical carbon dioxide is denser than natural gas or steam in this state, the volume of the supercritical carbon dioxide turbine that is also output is about one-third smaller than that of a gas turbine or steam turbine, but the energy efficiency is increased by 30%.
The system can utilize energy sources such as coal-fired power plants, renewable energy, nuclear power, and on-board engine power plants and waste heat from large ship engines. The partners plan to commercialize marine and land-based power generation waste heat recovery systems in 2019.
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