Views: 0 Author: Site Editor Publish Time: 2026-02-05 Origin: Site
Copper finned tube dryers are widely used in industrial air drying, gas cooling, and exhaust gas handling because of copper’s high thermal conductivity, corrosion resistance (in many environments), and mechanical reliability. The suitable temperature range is determined by copper’s material limits, fin performance, and the fluids involved.
Continuous service temperature: ~150–200 °C (300–390 °F) for standard copper (C110/C122)
Short-term peaks: up to 250 °C (480 °F) if properly designed and supported
Limitations:
Temperatures above ~200 °C can soften copper, especially in thin fins, reducing mechanical strength.
Oxidation is minimal below 200 °C in clean air but accelerates at higher temperatures.
Copper finned tube dryers can operate near 0 °C or below, but care must be taken to avoid:
Condensation or ice formation inside tubes or on fins
Thermal stress from rapid temperature changes
| Application Type | Inlet Gas / Air Temp | Outlet Temp |
|---|---|---|
| Industrial compressed air drying | 40–90 °C | 5–50 °C |
| Flue gas cooling / waste heat recovery | 80–180 °C | 40–120 °C |
| Refrigeration evaporators (air cooled) | −10 °C to 10 °C | −30 °C to 5 °C |
| Food/chemical dryers | 50–150 °C | 30–120 °C |
Fins: Thin aluminum or copper fins improve air-side heat transfer, but can deform at high temperatures (>200 °C).
Tube diameter & wall thickness: Must handle thermal expansion without warping.
Corrosive gases: If the gas is slightly acidic (e.g., SO₂, HCl), corrosion-resistant alloys or stainless steel may be required instead of pure copper.
Pressure drop: Dryer airflow must be balanced; excessive velocity can damage fins.
Safe continuous operation: 0–150 °C
Short-term tolerance: up to 200–250 °C with design precautions
Unsuitable: direct use with ammonia (R717) or very high-temperature flue gases (>250 °C) without alternative materials
