Share

Optimization of louvered-fin heat exchanger with variable louver angles.

Author(s) : JANG J. Y., CHEN C. C.

Type of article: Article

Summary

The optimization of the variable louver angle (????) and initial louver angle (?i?i) for a louvered-fin heat exchanger was determined numerically using the conjugate gradient method. The area reduction ratio relative to a plain surface was the objective function to be maximized. A search for the optimal variable louver angle (????) and initial louver angle (?i?i), in the ranges of +0° < ???? < +4° and 18° < ?i?i < 30°, respectively, was performed. The results show that the maximum area reduction ratios are 48.5%–55.2% for the optimal design of (????, ?i?i) at ReH = 133–1199 (Uin = 1.0–9.0 m/s). In order to validate the reliability of the numerical simulation procedure, a comparison of experimental and numerical simulation results was made with the scaled-up testing. This article shows the temperature for the scaled-up louvered fin as determined from infrared thermovision and numerical simulation, respectively. A comparison of images shows that both methods give similar temperature distributions across the entire louvered fin. In addition, it shows comparisons of j and f between the simulation and experimental results. The results show good agreements, with a maximum discrepancy of 12%.

Details


Links


See other articles in this issue (57)
See the source

Indexing