US 11,754,322 B2
Thermal storage of carbon dioxide system for power outage
Shitong Zha, Snellville, GA (US); Fardis Najafifard, Decatur, GA (US); and Xi Sun, Snellville, GA (US)
Assigned to Heatcraft Refrigeration Products LLC, Stone Mountain, GA (US)
Filed by HEATCRAFT REFRIGERATION PRODUCTS LLC, Stone Mountain, GA (US)
Filed on Jul. 12, 2022, as Appl. No. 17/862,516.
Application 17/010,175 is a division of application No. 15/667,194, filed on Aug. 2, 2017, granted, now 10,767,909, issued on Sep. 8, 2020.
Application 17/862,516 is a continuation of application No. 17/010,175, filed on Sep. 2, 2020, granted, now 11,428,443.
Prior Publication US 2022/0341633 A1, Oct. 27, 2022
Int. Cl. F25B 9/00 (2006.01); F25B 1/10 (2006.01); F25B 31/00 (2006.01); F25B 5/02 (2006.01); F25B 41/39 (2021.01)
CPC F25B 9/008 (2013.01) [F25B 1/10 (2013.01); F25B 31/006 (2013.01); F25B 5/02 (2013.01); F25B 41/39 (2021.01); F25B 2309/06 (2013.01); F25B 2400/23 (2013.01); F25B 2500/07 (2013.01); F25B 2600/2509 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A system comprising:
a high side heat exchanger configured to remove heat from a refrigerant;
a flash tank configured to:
store the refrigerant from the high side heat exchanger; and
discharge a flash gas;
a first load configured to use the refrigerant from the flash tank to remove heat from a first space proximate to the first load;
a second load configured to use the refrigerant from the flash tank to remove heat from a second space proximate to the second load;
a first compressor;
a second compressor configured to compress the refrigerant from the second load and the first compressor; and
a thermal storage tank configured, when a power outage is determined to be occurring, to:
receive at least a portion of the flash gas from the flash tank;
remove heat from the received flash gas, thereby condensing at least a portion of the received flash gas to a liquid refrigerant;
direct at least a portion of the liquid refrigerant to the flash tank;
wherein, the thermal storage tank is further configured, when the power outage is determined not to be occurring, to direct refrigerant to the second compressor.