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Off-design analysis of ORC and CO 2 power production cycles for low-temperature surplus heat recovery

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  • Harald Taxt Walnum
  • Daniel Rohde
  • Yves Ladam

Abstract

Electricity production with an organic Rankine cycle and a transcritical Rankine cycle is investigated in this paper with R-123 and CO 2 as working fluids, respectively. The analysis focuses on the off-design behavior with different control strategies to show some of the occurring difficulties. It was found that both cycles need an advanced control strategy to avoid non-feasible operation (R-123) or significant losses in work output (CO 2 ). A challenge for the advanced control is the required large change in expander speed, which can lead to compatibility problems with the grid. Copyright , Oxford University Press.

Suggested Citation

  • Harald Taxt Walnum & Daniel Rohde & Yves Ladam, 2011. "Off-design analysis of ORC and CO 2 power production cycles for low-temperature surplus heat recovery," International Journal of Low-Carbon Technologies, Oxford University Press, vol. 8(1), pages 29-36, November.
    • Handle: RePEc:oup:ijlctc:v:8:y:2011:i:1:p:29-36
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    File URL: http://hdl.handle.net/10.1093/ijlct/ctr043
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