Monthly Archives - October 2025

نقش اکسید آلومینیوم در کویل فین تیوب (فین آلومینیومی و تیوب مسی): تأثیرات بر انتقال حرارت و خوردگی
30Oct

The Role of Aluminum Oxide in Fin Tube Coils Aluminum Fins and Copper Tubes

Effects on Heat Transfer and Corrosion Aluminum oxide (Al2O3), present as an oxide film on aluminum fins or as suspended/ deposited particles, has both positive and negative effects on the performance of fin tube coils (aluminum fins with copper tubes). Below is a concise review of these effects and the underlying mechanisms. Positive effects • Surface protection: A passive aluminum oxide film can act as a relatively stable protective layer that inhibits further corrosion of aluminum. This layer shows reasonable resistance to mildly...

By Articles, Technichal Points, Training, ,
Read more...
حذف یا کاهش فاصله هوایی بین فین آلومینیومی و تیوب مسی در کویل
28Oct

Elimination or Reduction of Air Gap between Aluminum Fins and Copper Tubes in Coils

Eliminating the air gap between aluminum fins and copper tubes in fin-and-tube heat exchangers (coils) is an important step in design and manufacturing that directly affects thermal performance, energy consumption, durability, and operating costs. This study examines why the issue matters, the effective heat-transfer mechanisms, technical and economic consequences, and practical implementation methods. Importance of Contact-Based Heat Transfer In fin-and-tube exchangers the primary objective is rapid and efficient heat transfer from the tube surface (carrying hot or cold fluid) to the air...

By Articles, Technichal Points, Training, ,
Read more...
Why Copper Tubes Are Used in Fin-and-Tube Coils
28Oct

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. •...

By Articles, Technichal Points, Training,
Read more...