dtfinnedtube.com
G Fin Tube (commonly known as Embedded G-Fin Tube) is a high-efficiency heat exchange element, primarily used in air coolers, waste heat boilers, and various types of heat exchange equipment.
G-Type Finned Tubes Technical Parameter Reference (Example)
-
Base Tube Outer Diameter (OD): Commonly ranging from 12.7 mm to 50.8 mm (0.5″ to 2″); larger custom sizes are also available.
-
Fin Pitch (FPI): Typically between 2.3 そして 11.5 FPI (fins per inch).
-
Fin Height: Up to 16 mm or higher, depending on the specific design requirements.
-
Operating Temperature: Aluminum fins are generally suitable for temperatures ≤130°C to 150°C; copper fins can withstand higher temperatures.
Comparison with Other Fin Tube Types
| Fin Type | Manufacturing Process | Advantages | Disadvantages |
| G Fin (Embedded) | Embedded into grooves machined on the base tube. | Extremely low contact thermal resistance, high structural strength, and excellent vibration resistance. | Relatively high manufacturing cost; requires specialized machinery. |
| L Fin (Wrap-On) | Tension-wound with an L-shaped foot base. | Low cost, suitable for low-temperature applications, and easy to install. | May loosen or separate at elevated temperatures; slightly higher contact thermal resistance. |
| Extruded Fin | Integrally extruded and formed from an outer sleeve. | One-piece solid bond with zero contact thermal resistance; extremely durable. | Limited to specific materials (typically aluminum combinations); high cost. |
G Finned Tubes Key Features
-
High Thermal Efficiency: Because the fins are embedded into the base tube, the air gaps typically found in traditional tension-wound fins are eliminated. This significantly reduces contact thermal resistance and ensures a high heat transfer coefficient.
-
Corrosion & Vibration Resistance: The fins are securely protected within the grooves or tightly wrapped, preventing them from loosening or detaching. They can withstand high-velocity airflow impacts and thermal cycling stresses, resulting in a long service life.
-
Self-Cleaning Capability: Certain G-fin designs help minimize ash and dust accumulation, performing exceptionally well particularly in flue gas side applications.
- Material Diversity: The base tubes can be made of carbon steel, stainless steel, alloy steel, その他, while the fin materials are typically aluminum (Aluminum A1100/A1050) or copper (Copper C1100/C1220).
Embedded G-Fin Tube Typical Application Scenarios
-
Power Industry: Power station air preheaters, condensers, and economizers.
-
Petrochemical Industry: Gas coolers, compressor aftercoolers, and process fluid heaters.
-
Industrial Drying & Refrigeration: Large-scale HVAC/air conditioning systems, industrial dryers, and refrigerant evaporators.
-
Other Fields: Geothermal power generation and waste-to-energy (incineration) waste heat recovery.
