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

Katarzyna Janusz-Szymańska and Aleksandra Dryjańska

Energy, 2015, vol. 85, issue C, 45-61

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.

Keywords: Oxy-type power plant; Cryogenic air separation unit; Economic analysis of the power plant; Electricity break-even price (search for similar items in EconPapers)
Date: 2015
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:85:y:2015:i:c:p:45-61

DOI: 10.1016/j.energy.2015.03.049

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