Performance of compact louvered fin-and-tube heat exchangers under dehumidifying condition

The air side performances of louvered fin surface under dehumidifying conditions were presented in this study. A total of four fin-and-tube heat exchangers were tested and compared. The test results indicated that the effect of fin pitch on the heat transfer performance is very small for Re{sub Dc} > 2,000 and N = 2. For N = 1, the heat transfer performances increase with decrease of fin pitch. Converse to the test results for fully dry condition, the friction factors increase significantly with fin pitch for fully wet conditions.