Structural Optimization of Bow-shaped Baffles in Shell-Tube Heat Exchangers
For purpose of investigating both flow and heat transfer characteristics of a high-temperature flue gas quencher's air secondary cooling system,a simplified model for the shell-tube heat exchanger was es tablished and then simulated with ANSYS software,including analyzing the effect of baffle plate's quantity,baffle gap's relative height,baffle spacing and the arrangement of both inlet and outlet pipes on the heat exchanger performance.The results show that,the more number of baffle plates can make the height of the baffle's relative notch smaller;the greater pressure drop of the heat exchanger brings about greater heat transfer coefficient and smaller comprehensive performance index.The average heat transfer coefficient of the heat exchanger with small baffles spacing in the high-temperature region and large baffles spacing in the low-temperature region can be increased by 4.3%and the average comprehensive performance index in-creased by 2.3%compared with the heat exchanger with equal spacing baffles.The average heat transfer coefficient can be increased by 6.5%and the average comprehensive performance index increased by 4.3%when the air outlet pipe is arranged at the inlet side of the hot fluid.
NETL
NSTL
万方数据
