To study the thermal hydraulic characteristics of the printed circuit heat exchanger with rhombic fin channels

variations in thermal hydraulic characteristics on the hot and cold sides were analyzed by numerical simulation

with cold side inlet temperature of 313.15～353.15 K and hot side inlet temperature of 553.15～593.15 K. The working medium on the cold side and the hot side were S-CO_2 and gaseous CO_2 respectively.The comprehensive performance was compared between NACA0030 airfoil fin channels and rhombic fin channels.The results show that when the inlet temperature of S-CO_2 increases by 40 K

the total heat transfer decreases by 23.91%

and the pressure drop of hot and cold increases by 29.95% and 11.14% respectively. When the temperature of gaseous CO_2 increases by 40 K

the total heat transfer increases by 16.40%

and the pressure drop of hot and cold increases by 9.42% and 7.43% respectively.The inlet temperature of S-CO_2 has more obvious influences on the thermal hydraulic characteristics. The printed circuit heat exchanger with rhombic fin channels has less flow resistance and better comprehensive performance. The results have a certain reference significance for the design of printed circuit heat exchangers with discontinuous channels.