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ISSN Online: 2379-1748

ISBN Flash Drive: 978-1-56700-483-0

ISBN Online: 978-1-56700-482-3

4th Thermal and Fluids Engineering Conference
April, 14–17, 2019 , Las Vegas, NV, USA

INLET FLOW MALDISTRIBUTION EFFECT ON THREE-FLUID CROSS-FLOW HEAT EXCHANGER ARRANGEMENTS

Get access (open in a dialog) pages 221-230
DOI: 10.1615/TFEC2019.che.028439

Аннотация

Investigations on the effect of uniform inlet flow and inlet flow maldistribution in two types of three-fluid cross-flow heat exchanger arrangement is carried out. Type of heat exchangers being selected are the cross-cocurrent flow arrangement (C4), and the cross-countercurrent flow arrangement (C3). The central hot fluid is assumed to exchange heat with two cross-flow cold fluids in both the arrangements. The governing equations are derived based on the conservation of energy principle and solved by finite element method. The results are presented in terms of overall effectiveness and number of transfer units for different values of governing parameters. Deterioration factor is used to compare the effects on two types of arrangements. The results indicate that when there is flow maldistribution effect, the thermal performance of a three-fluid heat exchanger will be degraded more than the performance of the uniform inlet flow effect in all cases. Also cross-cocurrent (C4) flow arrangement is superior to the cross-countercurrent (C3) flow arrangement in both the uniform or maldistribution inlet flow effects.