N2 - Oxy combustion is the most promising technology for carbon dioxide, originated from thermal power plants, capture and storage. The oxygen in sufficient quantities can be separated from air in cryogenic installations. Even the state-of-art air separation units are characterized by high energy demands decreasing net efficiency of thermal power plant by at least 7%. This efficiency decrease can be mitigated by the use of waste nitrogen, e.g., as the medium for lignite drying. It is also possible to store energy in liquefied gases and recover it by liquid pressurization, warm-up to ambient temperature and expansion. Exergetic efficiency of the proposed energy accumulator may reach 85%. L1 - http://www.journals.pan.pl/Content/94731/PDF/11_paper.pdf L2 - http://www.journals.pan.pl/Content/94731 PY - 2015 IS - No 1 March EP - 170 DO - 10.1515/aoter-2015-0011 KW - air separation KW - oxy-combustion KW - energy storage A1 - Chorowski, Maciej A1 - Gizicki, Wojciech PB - The Committee of Thermodynamics and Combustion of the Polish Academy of Sciences and The Institute of Fluid-Flow Machinery Polish Academy of Sciences DA - 2015[2015.01.01 AD - 2015.12.31 AD] T1 - Technical and economic aspects of oxygen separation for oxy-fuel purposes SP - 157 UR - http://www.journals.pan.pl/dlibra/publication/edition/94731 T2 - Archives of Thermodynamics