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In this book heat exchanger was tested with varying fin thickness and fin itch of aluminium tube. The fin geometry, material thermal conductivity, boundary condition at the fin tip, and heat transfer coefficient (h) at the fin surface all affect how effective a composite-based fin is. Heat transfer for forced convection was calculated using an aluminum test piece with composite-based fin thicknesses of 0.5, 0.6, and 0.7mm and fin pitches of 4.23 and 6.35 mm. The findings show that a 4.23 mm spacing optimizes heat transfer, indicating that more fins are more effective. Colburn's factor (j) was...