EP 2703610 B1 20150617 - Method and system for energy storing and short-term power generation
Title (en)
Method and system for energy storing and short-term power generation
Title (de)
Verfahren und System zum Energiespeichern und Kurzzeitstromerzeugung
Title (fr)
Procédé et système de stockage d'énergie et génération de puissance à court terme
Publication
Application
Priority
EP 12182561 A 20120831
Abstract (en)
[origin: EP2703610A1] In a method for energy storing and short-term power generation, an intermediate storage of a CCS system is used to store the working fluid of a CO 2 based Rankine process. Liquid CO 2 is stored in an underground reservoir (10) arranged to continually receive liquid CO 2 at a first temperature from one or more CO 2 capture sites and to discharge liquid CO 2 to be transported to a final storage. The underground reservoir (10) is kept at a pressure of 8 - 10 bar. When short-term power generation is needed, liquid CO 2 is withdrawn from the underground reservoir (10), pressurized to about 40 - 50 bar, evaporated with the help of a low value heat source, and expanded in an expander turbine (13), which is connected to a generator (14). The expanded CO 2 is then condensed and returned to the underground reservoir (10) at a second temperature which is higher than the first temperature. When short-term power generation is no more needed, liquid CO 2 from the underground reservoir (10) is circulated through a heat pump (23) to cool the CO 2 until its temperature reaches the first temperature.
IPC 8 full level
F01K 25/10 (2006.01)
CPC (source: EP)
F01K 25/103 (2013.01)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
EP 2703610 A1 20140305; EP 2703610 B1 20150617; CN 104603403 A 20150506; CN 104603403 B 20170510; PL 2703610 T3 20160129; WO 2014033206 A1 20140306
DOCDB simple family (application)
EP 12182561 A 20120831; CN 201380045356 A 20130829; EP 2013067884 W 20130829; PL 12182561 T 20120831