Abstract
In this paper, fluid flow and heat transfer over a three-dimensional staggered circular-pin-finned tube bundle heat exchanger surface have been numerically investigated. The effects of six geometric parameters and pin-fin arrangement in the flow direction on the thermo-hydraulic performance are investigated in details by adopting the performance evaluation plot of enhanced heat transfer oriented for energy-saving. The results show that the pin-fin diameter d, pin-fin length H, and pin-fin number around the tube N have positive effects on improving thermo-hydraulic performance, but the transverse tube pitch S1 and the fin axial pitch S1,pf have negative effects, whereas the longitudinal tube pitch S2 and the fin arrangement in flow direction (in-line or staggered) have little effects.
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