US 11,725,852 B2
Cooling system for fluid to be cooled
Kimihiro Sawa, Tokyo (JP); Hiromichi Noma, Tokyo (JP); and Taiga Yamamoto, Tokyo (JP)
Assigned to IHI Corporation, Tokyo (JP)
Filed by IHI Corporation, Tokyo (JP)
Filed on Jul. 26, 2022, as Appl. No. 17/873,964.
Application 17/873,964 is a division of application No. 16/574,533, filed on Sep. 18, 2019, granted, now 11,466,903.
Application 16/574,533 is a continuation of application No. PCT/JP2018/035620, filed on Sep. 26, 2018.
Claims priority of application No. 2018-070008 (JP), filed on Mar. 30, 2018.
Prior Publication US 2022/0357080 A1, Nov. 10, 2022
Int. Cl. F25B 9/00 (2006.01); F25B 43/00 (2006.01); F25B 49/02 (2006.01)
CPC F25B 9/008 (2013.01) [F25B 43/00 (2013.01); F25B 49/022 (2013.01); F25B 2309/06 (2013.01); F25B 2500/04 (2013.01); F25B 2600/21 (2013.01); F25B 2700/21175 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A cooling system comprising:
a compressor configured to pressurize carbon dioxide to form pressurized carbon dioxide;
a mixer configured to generate a mixed refrigerant in which the pressurized carbon dioxide and a solvent in a liquid state are mixed;
a depressurization apparatus provided downstream from the mixer and configured to depressurize the mixed refrigerant, the depressurization apparatus including a valve;
a separator configured to separate carbon dioxide in a gas state from the mixed refrigerant;
a heat exchanger configured to exchange heat between the mixed refrigerant cooled through depressurization and a fluid to be cooled; and
a second heat exchanger configured to cool the pressurized carbon dioxide or the mixed refrigerant using vaporized carbon dioxide or the mixed refrigerant,
wherein the second heat exchanger is integrated with the heat exchanger,
the heat exchanger is configured such that the mixed refrigerant and the fluid to be cooled always flow in opposite directions with respect to each other in the heat exchanger, and
the second heat exchanger is configured such that the vaporized carbon dioxide or the mixed refrigerant and the pressurized carbon dioxide or the mixed refrigerant always flow in opposite directions with respect to each other in the second heat exchanger.