US 11,788,466 B2
Compressed N2 for energy storage
Omar M. Kabir, Waller, TX (US); Gary W. Sams, Spring, TX (US); and Ronald J. Manson, Spring, TX (US)
Assigned to Schlumberger Technology Corporation, Sugar Land, TX (US)
Appl. No. 16/769,886
Filed by Schlumberger Technology Corporation, Sugar Land, TX (US)
PCT Filed Dec. 10, 2018, PCT No. PCT/US2018/064705
§ 371(c)(1), (2) Date Jun. 4, 2020,
PCT Pub. No. WO2019/113575, PCT Pub. Date Jun. 13, 2019.
Claims priority of provisional application 62/596,240, filed on Dec. 8, 2017.
Prior Publication US 2020/0386156 A1, Dec. 10, 2020
Int. Cl. F02C 6/14 (2006.01); F02C 3/13 (2006.01); F02C 6/06 (2006.01); F02C 7/08 (2006.01)
CPC F02C 6/14 (2013.01) [F02C 3/13 (2013.01); F02C 6/06 (2013.01); F02C 7/08 (2013.01); F05D 2210/12 (2013.01); F05D 2220/32 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A power system, comprising:
a first compressor with a first inlet and a first outlet;
a nitrogen separator coupled to the first outlet, the nitrogen separator comprising a nitrogen concentrate outlet and a byproduct outlet;
a second compressor including a second inlet coupled to the nitrogen concentrate outlet, the second compressor including a second outlet for supplying concentrated nitrogen gas to a storage volume;
a turbine generator including an expander and a generator with a third inlet for coupling to the storage volume and a third outlet coupled to the second inlet such that at least a portion of the concentrated nitrogen gas exiting the third outlet flows into the second inlet; and
a vent coupled to the third outlet, wherein another portion of the concentrated nitrogen gas exiting the third outlet enters an atmosphere through the vent.