Elliptical (Oval) Plate Fin Coils: Aerodynamic Design and High Efficiency

Offering an innovative approach in heat transfer technologies, Elliptical (Oval) Plate Fin Coils are developed especially for systems where air resistance must be minimized. The elliptical (oval) structure of the tube form reduces resistance against air flow by 20-30% compared to classic round tubes. This aerodynamic advantage allows you to use the heat transfer surface area more effectively while reducing fan energy consumption.

Produced with Fintherm engineering, oval plate fin coils fully surround the tube surface with a rectangular fin (plate) structure. The contact between the tube and the fin is strengthened through special expansion or hot electro-galvanizing techniques, making the thermal bridge flawless.

Technical Advantages of Elliptical Design

Oval-structured coils not only provide space savings but also feature technical details that increase the total efficiency of the system. The “dead zone” (the area where air flow does not contact) that occurs at the back of the tube in round-tube coils is minimized in the elliptical design. This ensures maximum heat extraction from every point of the fin surface.

• Low Air Pressure Loss: Fan motors operate with less load thanks to the aerodynamic form, which reduces operating costs.
• Compact Structure: Offers high heating or cooling capacity in narrow spaces; ideal especially for air handling units.
• High Corrosion Resistance: Durable against harsh outdoor conditions and chemical fluids thanks to complete electro-galvanized coating.
• Excellent Thermal Contact: Expansion methods applied after the plate finning process make the tube and fin act as a single body.

Manufacturing Process and Material Standards

Elliptical plate fin coil manufacturing involves precision molding processes. Standard circular tubes are brought into an oval form in special machines without losing their strength. Subsequently, rectangular plates (fins) drilled according to this form are lined up on the tube with automated systems. After the cleaning stage, they are subjected to electro-galvanizing or soldering processes depending on the intended use.

As Fintherm, we use carbon steel, stainless steel, and copper alloy tubes in production in accordance with ASTM and EN standards. Especially in the maritime and chemical sectors where corrosion is intense, stainless oval tube and stainless fin combinations offer long-lasting solutions.

Application Areas

Thanks to their aerodynamic structure and high heat transfer capability, these coils are the primary choice in the following areas:

• Air Handling Units: Systems providing high air flow rates in narrow sections.
• Air Heaters and Coolers: Industrial drying ovens and process heating.
• Oil Cooling Units: Hydraulic systems and turbine oil coolers.
• Textile Drying Machines: High-efficiency steam heating systems.