On the flow field and heat transfer characteristics of a supercritical CO₂-cooled microchannel heat sink under high heat flux conditions

Pourfattah, Farzad1; Wang, Lianping1; Yan, Wei-Mon2; Timchenko, Victoria3

2023-10-01

10.1080/10407782.2023.2270156

NUMERICAL HEAT TRANSFER PART A-APPLICATIONS   影响因子和分区

1040-7782

1521-0634

Supercritical CO2 (sCO(2)) is a suitable choice as a coolant due to its favorable thermodynamic characteristics (lower density and viscosity, and higher specific heat) compared to water. In the current investigation, sCO(2) is considered a coolant in a micro heat sink under high heat fluxes 75, 100, 125, and 150 W/cm(2) and the operating pressure 8 MPa. The effects of the operating conditions, including the change in coolant mass flux (1250-3125 kg/s-m(2)), the change in the inlet temperature (305-308 K) under the mentioned heat fluxes on the heat transfer coefficient, thermal resistance, pressure drop, pumping power, and performance evaluation criteria (PEC) are investigated numerically using the finite volume method. Results indicated that thermohydraulic performance of the sCO(2)-cooled heat sink depends on the inlet coolant temperature and the applied heat flux due to the dramatic variation of the local thermophysical properties. It was found that increase in the heat flux from 75 to 150 W/cm(2) results in increase of the pumping power by 48%, diminishing the PEC from 2.35 to 0.5. Overall, sCO(2)-cooled heat sink performs better than water-cooled heat sink if the mass flow rate is high and the inlet temperature is below the pseudocritical temperature. Otherwise, using sCO(2) is not beneficial, especially under higher heat flux conditions.

CFD Cooling MCHS Supercritical CO2 Thermal management

SCI ; EI

英语

第一 ; 通讯

Thermodynamics ; Mechanics

Thermodynamics ; Mechanics

WOS:001087404600001

TAYLOR & FRANCIS INC

20234314932473

Carbon dioxide ; Computational fluid dynamics ; Coolants ; Finite volume method ; Heat flux ; Heat resistance ; Heat transfer ; Specific heat ; Temperature

Heat Exchange Equipment and Components:616.1 ; Thermodynamics:641.1 ; Heat Transfer:641.2 ; Computer Applications:723.5 ; Chemical Agents and Basic Industrial Chemicals:803 ; Inorganic Compounds:804.2 ; Numerical Methods:921.6 ; Mechanics:931.1

ENGINEERING

Web of Science

1.Southern Univ Sci & Technol, Dept Mech & Aerosp Engn, Shenzhen 518000, Guangdong, Peoples R China
2.Natl Taipei Univ Technol, Dept Energy & Refrigerating Air Conditioning Engn, Taipei, Taiwan
3.Univ New South Wales, Sch Mech & Mfg Engn, Kensington, NSW, Australia

Pourfattah, Farzad,Wang, Lianping,Yan, Wei-Mon,et al. On the flow field and heat transfer characteristics of a supercritical CO₂-cooled microchannel heat sink under high heat flux conditions[J]. NUMERICAL HEAT TRANSFER PART A-APPLICATIONS,2023.

Pourfattah, Farzad,Wang, Lianping,Yan, Wei-Mon,&Timchenko, Victoria.(2023).On the flow field and heat transfer characteristics of a supercritical CO₂-cooled microchannel heat sink under high heat flux conditions.NUMERICAL HEAT TRANSFER PART A-APPLICATIONS.

Pourfattah, Farzad,et al."On the flow field and heat transfer characteristics of a supercritical CO₂-cooled microchannel heat sink under high heat flux conditions".NUMERICAL HEAT TRANSFER PART A-APPLICATIONS (2023).