بایگانی‌ها Fin-and-Tube Coils

Inline vs. Staggered Tube Arrangement in Fin-and-Tube Coils

Brief introduction: Fin–tube coils (aluminum fins and copper tubes) are commonly arranged in two tube layouts: inline (linear rows/columns) and staggered (triangular). Each layout affects airflow behavior, heat transfer coefficient, pressure drop, and manufacturing/installation costs. Inline layout Structural features: o Tubes are placed in regular rows and columns with uniform spacing; the pattern is rectangular/square rather than hexagonal. Effects on heat transfer: Positives: Airflow is more uniform and less turbulent, giving a more predictable velocity distribution and simplifying convection modeling. Thinner, more stable boundary layers in some...

Why Copper Tubes Are Used in Fin-and-Tube Coils

Introduction The choice of tube material in fin-and-tube coils strongly affects performance, durability, and life-cycle cost in HVAC, chillers, boilers, and heat exchangers. Copper (Cu) is one of the most common choices. Below are technical, organized reasons why copper tubes are preferred. 1. High Thermal Conductivity • Copper has very high thermal conductivity compared with many common metals (e.g., carbon steel). • High conductivity enables fast, efficient heat transfer between the fluid inside the tube and the external fins, improving overall coil heat-transfer effectiveness. •...