US 11,655,759 B2
Modular thermal storage
Raj B. Apte, Cambridge, MA (US); Philippe Larochelle, Cambridge, MA (US); and Julian Green, Cambridge, MA (US)
Assigned to MALTA, INC., Cambridge, MA (US)
Filed by MALTA INC., Cambridge, MA (US)
Filed on Nov. 9, 2020, as Appl. No. 17/92,806.
Application 17/092,806 is a continuation of application No. 16/576,357, filed on Sep. 19, 2019, granted, now 10,830,134.
Application 16/576,357 is a continuation of application No. 15/396,461, filed on Dec. 31, 2016, granted, now 10,436,109, issued on Oct. 8, 2019.
Prior Publication US 2021/0054785 A1, Feb. 25, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. F02C 6/16 (2006.01); F01K 3/12 (2006.01); F01K 7/16 (2006.01); F01K 23/10 (2006.01); F02C 1/10 (2006.01); H02K 7/18 (2006.01)
CPC F02C 6/16 (2013.01) [F01K 3/12 (2013.01); F01K 7/16 (2013.01); F01K 23/10 (2013.01); F02C 1/10 (2013.01); H02K 7/1823 (2013.01); Y02E 20/14 (2013.01); Y02E 20/16 (2013.01); Y02E 60/16 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A pumped thermal system comprising:
a shared cold-side thermal store comprising a cold thermal storage (“CTS”) medium; and
a plurality of power subunits configured to share the shared cold-side thermal store, each power subunit comprising:
a compressor,
a hot-side heat exchanger,
a turbine,
a cold-side heat exchanger,
a working fluid circulating in a closed cycle path, wherein the closed cycle path comprises, in sequence, the compressor, the hot-side heat exchanger, the turbine, and the cold-side heat exchanger, and
a valve arrangement for selective connection to flow CTS medium between the cold-side heat exchanger and the shared cold-side thermal store, the valve arrangement configurable to be in a connected state to flow CTS medium from and return CTS medium to the shared cold-side thermal store to connect the cold-side heat exchanger in thermal communication with the shared cold-side thermal store, and configurable in an isolated state to block flow of CTS medium between the cold-side heat exchanger and the shared cold-side thermal store to thermally isolate the cold-side heat exchanger from the shared cold-side thermal store.