INDUSTRY COMPONENT

Fins

Fins are extended surfaces attached to heating/cooling coils to enhance heat transfer efficiency by increasing surface area.

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Component Specifications

Definition
Fins are thin, plate-like or corrugated metallic components that are mechanically bonded or soldered to the tubes of heating/cooling coils. They function as extended surfaces that significantly amplify the effective heat transfer area, facilitating more efficient thermal exchange between the fluid inside the tubes and the surrounding air or gas. Their design directly impacts the coil's overall thermal performance, pressure drop, and compactness.
Working Principle
Fins operate on the principle of extended surface heat transfer. By attaching to the primary heat transfer surface (the coil tubes), they increase the total area available for convective heat exchange with the ambient medium. This reduces the thermal resistance on the air/gas side, which is typically the limiting factor, thereby improving the overall heat transfer coefficient and efficiency of the coil assembly.
Materials
Typically aluminum (for its high thermal conductivity and lightweight) or copper. May also be made from stainless steel, carbon steel, or coated materials (e.g., hydrophilic coatings) for specific corrosion resistance or performance requirements in harsh environments.
Technical Parameters
  • Fin Type Plate, Corrugated, Louvered, Wavy, Slit
  • Fin Pitch 1.2 mm to 5.0 mm
  • Fin Height 5 mm to 20 mm
  • Fin Thickness 0.1 mm to 0.3 mm
  • Tube Attachment Method Mechanical expansion, Soldering, Epoxy bonding
Standards
ISO 5149, ISO 15012, DIN EN 1886

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Fins.

heat transfer fins cooling coil fins heating coil fins extended surface finned tube louvered fins corrugated fins HVAC components refrigeration coils Fins Fins in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Heating/Cooling Coils

Heat exchange components within Air Handling Units that transfer thermal energy to or from air streams

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Heat Exchanger/Cooling Surface

A component within the Cooling Zone that facilitates heat transfer between fluids or between a fluid and a surface to remove excess heat.

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Cooler

A heat exchanger component within a lubrication system that removes excess heat from lubricating oil to maintain optimal operating temperatures.

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Engineering Analysis

Risks & Mitigation
  • Fin corrosion leading to reduced efficiency and coil failure
  • Fin blockage from dirt/debris increasing pressure drop
  • Mechanical damage (bending, crushing) during handling or operation
  • Poor fin-to-tube contact causing thermal resistance
FMEA Triads
Trigger: Exposure to corrosive atmospheres (e.g., salt, chemicals) or galvanic corrosion.
Failure: Corrosion and pitting of fins, reducing heat transfer area and structural integrity.
Mitigation: Use corrosion-resistant materials (stainless steel, coated aluminum), apply protective coatings, implement regular inspection and cleaning schedules.
Trigger: Accumulation of dust, dirt, or frost between fins.
Failure: Reduced airflow, increased pressure drop, and diminished heat transfer efficiency.
Mitigation: Design with adequate fin spacing, install air filters upstream, schedule periodic cleaning, use hydrophilic coatings to prevent water bridging.

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Fin pitch tolerance: ±0.2 mm; Fin flatness: within 0.5 mm over 100 mm length; Tube-to-fin contact: >85% surface contact for bonded types.
Test Method
Thermal performance tested per ASHRAE 33; Pressure drop tested per ISO 5801; Corrosion resistance tested per ASTM B117 (salt spray); Mechanical bond strength tested via pull-off test.

Buyer Feedback

★★★★☆ 4.9 / 5.0 (11 reviews)

"Found 47+ suppliers for Fins on CNFX, but this spec remains the most cost-effective."

"The technical documentation for this Fins is very thorough, especially regarding technical reliability."

"Reliable performance in harsh Machinery and Equipment Manufacturing environments. No issues with the Fins so far."

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Frequently Asked Questions

What is the primary function of fins on a heating/cooling coil?

The primary function is to increase the surface area of the coil, which enhances the rate of heat transfer between the internal fluid (like refrigerant or water) and the external air or gas, making the system more efficient.

How does fin pitch affect coil performance?

A smaller fin pitch increases surface area and heat transfer but also raises air-side pressure drop and risk of fouling. A larger pitch reduces pressure drop and improves cleanability but decreases heat transfer efficiency. Selection balances thermal performance with airflow resistance.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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