Abstract
An experimental study was made to clarify the fundamental characteristics of the tube side flow rate distributions in a multi-tube heat exchanger. Experimental parameters considered were the flow rate of feed water, the nozzle direction, the nozzle diameter, the length of the branch tube and the length of the header. The velocity in each branch tube was determined by the frictional pressure drop measured. The results show that both the dynamic pressure of feed water to the heat exchanger header and the pressure loss in a branch tube had a significant effect on the flow rate distribution. In some experimental conditions, the maximum flow rate in a tube was approximately twice as large as the mean flow rate of the tube bundle, which may not be ignored in the design of heat exchanger.
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