Determining the Air-Side Performance of Small Diameter, Enhanced Tube-Fin Heat Exchangers Through Numerical and Experimental Method | Posted on:2018-08-08 | Degree:M.S | Type:Thesis | University:University of Maryland, College Park | Candidate:Nasuta, Dennis | Full Text:PDF | GTID:2472390020957473 | Subject:Mechanical engineering | Abstract/Summary: | | New correlations for the air-side pressure drop and heat transfer coefficient (HTC) of slit and louver fin heat exchangers with 3-5 mm outer diameter tubes were developed based on Computational Fluid Dynamics (CFD) simulations of small, symmetric fin sections using Design of Experiments (DOE) techniques. The prediction accuracy of these CFD-based correlations was validated by experimental testing of 16 unique 5 mm slit and louver fin heat exchangers under a range of air velocities. The experimental results indicate that the proposed CFD-based correlation with correction factors for air-side pressure drop can predict 100% of the experimental observations with 20% error or less. After a new data reduction procedure accounting for fin conduction was implemented and a single correction factor applied, the HTC correlations could predict 98% of accepted test data with 20% error or less regardless of fin type. | Keywords/Search Tags: | Fin, Heat exchangers, Air-side, Experimental, Correlations | | Related items |
| |
|