The optimization of the louver angle (θ) and the louver pitch (Lp) for a louver finned and tube heat exchanger was investigated numerically along with a simplified conjugate-gradient method (SCGM). The area reduction ratio relative to a plain surface is the objective function to be maximized. A search for the optimum louver angle (θ) and louver pitch (Lp), ranging from 15°< θ < 40° and 2 mm < Lp < 3.2 mm, respectively, was performed. The results showed that the maximum area reduction ratios may reach 39~46% combined with the optimal design of (θ, Lp) at ReD = 589~3533 (Uin= 0.5-3.0 m/s).
Key words: Optimization, louver pitch, louver angle, finned and tube heat exchanger.
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