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Peak and off-peak operations of the air separation unit in oxy-coal combustion power generation systems
Royal Institute of Technology .
Tianjin University, School of Mechanical Engineering, China .
Mälardalens högskola, Akademin för ekonomi, samhälle och teknik.ORCID-id: 0000-0002-6279-4446
Mälardalens högskola, Akademin för ekonomi, samhälle och teknik.ORCID-id: 0000-0003-0300-0762
2013 (engelsk)Inngår i: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 112, s. 747-754Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Introducing CO2 capture and storage (CCS) into the power systems requires the re-investigation of the load balance for the electrical grid. For the oxy-coal combustion capture technology, the energy use of ASU can be shifted between the peak-load and off-peak-load periods, which may bring more benefits. In this paper, peak and off-peak (POP) operations for the air separation unit (ASU) with liquid oxygen storage were studied based on a 530MW coal-fired power system. According to the simulation results, the oxy-coal combustion power system running POP is technically feasible that it can provide a base load of 496MW during the off-peak period and a peak load of 613MW during the peak period. And the equivalent efficiency of the power system running POP is only 0.3% lower than the one not running POP. Moreover, according to the economic assessments based on the net present value, it is also economically feasible that the payback time of the investment of the oxy-coal combustion power system running POP is about 13years under the assumptions of 10% discount rate and 2.5% cost escalation rate. In addition, the effects of the difference of on-grid electricity prices, daily peak period, investment for POP operations, and ASU energy consumption were also analyzed, concerning the net present value.

sted, utgiver, år, opplag, sider
2013. Vol. 112, s. 747-754
Emneord [en]
Air separation unit (ASU), CO2 capture, Economic assessment, Oxy-coal combustion, Peak and off-peak operations
HSV kategori
Identifikatorer
URN: urn:nbn:se:mdh:diva-21686DOI: 10.1016/j.apenergy.2012.12.001ISI: 000329377800080Scopus ID: 2-s2.0-84884211048OAI: oai:DiVA.org:mdh-21686DiVA, id: diva2:651904
Tilgjengelig fra: 2013-09-27 Laget: 2013-09-27 Sist oppdatert: 2017-12-06bibliografisk kontrollert

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