Patent ID: 8087256
Filing Date: 2012-01-03
Classification: C09K,F25B,Y02P

Abstract:
1. A cooling method using supercritical fluids and microchannel cooling technology comprising: a. a closed cooling cycle beginning from compression of liquid refrigerant at an initial temperature and pressure below the critical point to reach the pressure above the critical pressure at said initial temperature below the critical temperature; b. transferring compressed refrigerant into microchannel thermal contact (direct, indirect, or combination thereof) with objects to be cooled in order to absorb the heat produced by said objects to be cooled corresponding to a refrigerant temperature increase and a pressure drop due to the hydraulic resistance inside the microchannels that transfers the refrigerant into a near-critical state; c. cooling said refrigerant in said near-critical state in order to reject the absorbed heat with a simultaneous temperature and pressure decrease of the refrigerant to reach said initial temperature and pressure below said critical point corresponding to the transition of refrigerant into the liquid phase; d. compression of liquid refrigerant at said initial temperature and pressure below said critical point to reach the pressure above said critical pressure at said initial temperature in order to continuously repeat said closed cooling cycle.