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Possibilities for improving the thermodynamic and economic characteristics of an oxy-type power plant with a cryogenic air separation unit

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  • Janusz-Szymańska, Katarzyna
  • Dryjańska, Aleksandra

Abstract

In this paper the thermo-economic analysis of the oxy-type supercritical power plant integrated with the cryogenic air separation unit was presented, with the efficiency of the whole power plant of 32.26%. The reduction of energy intensity of ASU (air separation unit) was proposed by appending the membrane module. A hybrid air separation unit allows to decrease the energy intensity of oxygen production from the value of 0.226 kWh/kg O2 for the cryogenic ASU to 0.179 kWh/kg O2, for the analyzed hybrid membrane-cryogenic ASU, with an increase of the net efficiency to 33.84%. This solution causes the efficiency change by 8.7 percentage points in comparison with the reference air-fired power plant.

Suggested Citation

  • Janusz-Szymańska, Katarzyna & Dryjańska, Aleksandra, 2015. "Possibilities for improving the thermodynamic and economic characteristics of an oxy-type power plant with a cryogenic air separation unit," Energy, Elsevier, vol. 85(C), pages 45-61.
    • Handle: RePEc:eee:energy:v:85:y:2015:i:c:p:45-61
    DOI: 10.1016/j.energy.2015.03.049
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    References listed on IDEAS

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