Experimental investigation of header configuration on two-phase flow distribution in plate-fin heat exchanger

摘要

The two-phase flow distribution in a plate-fin heat exchanger has been experimentally studied under different operation conditions. The results indicate that two-phase flow distribution is more complex and nonuniform than that of single-phase flow. The distribution uniformity of liquid-phase deteriorates with the decrease of Re_(gas) and Re_(liq). The distribution uniformity of gas-phase deteriorates with Re_(liq), but improves with Re_(gas). The improved header with perforated baffle can effectively improve the uniformity of two-phase flow distribution and dryness distribution. The values of S_(liq), S_(gas) and S_(dry) decrease by 5.4-44.0%, 4.7-35.0% and 11.7-30.0%, respectively. The conclusion is of great significance in the optimum design of plate-fin heat exchanger.