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The Copper Evaporator is a heat exchange component renowned for its exceptional thermal conductivity and structural integrity, designed for refrigeration, HVAC, and industrial cooling systems. Constructed with high-purity 99.9% copper tubes and aluminum fins, it facilitates efficient heat transfer between refrigerants and surrounding media. Its design prioritizes compatibility with diverse refrigerants, making it a versatile choice for both residential and large-scale industrial applications. The evaporator's robust build ensures stable performance in dynamic temperature environments, reducing system downtime and operational costs.
With a thermal conductivity of 401 W/(m·K) for copper tubes, the evaporator achieves 20% faster heat transfer compared to aluminum-only models. This property is critical in applications requiring rapid cooling, such as food freezing lines and pharmaceutical refrigeration units. The copper-aluminum composite structure balances conductivity with lightweight design, reducing overall system load.
The copper tubes undergo electrolytic plating with a nickel-chromium layer (thickness 5–10μm), enabling resistance to moisture-induced corrosion for up to 15,000 hours in salt spray tests . This treatment extends the service life by 30% in coastal or high-humidity regions compared to untreated copper.
The evaporator works with HFCs (e.g., R134a, R410A), HCs (e.g., R290), and natural refrigerants (e.g., CO₂/R744), adhering to global environmental standards (EU F-gas Regulation). Its internal surface finish (Ra ≤0.8μm) minimizes refrigerant flow resistance, optimizing system efficiency.
Tube diameters range from 6mm to 19mm, with fin spacing adjustable between 1.8mm and 4.0mm to match specific airflow requirements. The evaporator can be manufactured in U-bend, serpentine, or multi-circuit configurations, fitting compact spaces or high-capacity systems.
It operates under working pressures up to 4.5 MPa, with a burst pressure of 13.5 MPa, ensuring safety in high-pressure refrigeration cycles (e.g., transcritical CO₂ systems).
Residential Refrigeration: Used in domestic fridges and freezers for consistent temperature maintenance.
Commercial HVAC: Integrated into chillers and air handling units for office buildings and shopping malls.
Food Processing: Critical in blast freezers and cold storage warehouses, preserving perishables at -18°C to 4°C.
Industrial Cooling: Applied in plastic injection molding and laser cutting machines to regulate equipment temperatures.
Q: How does copper compare to aluminum in evaporator performance?
A: Copper’s higher thermal conductivity (401 W/(m·K) vs. aluminum’s 205 W/(m·K)) enables faster heat exchange, while aluminum offers lighter weight. The copper-aluminum composite design combines both advantages, with copper handling refrigerant flow and aluminum fins enhancing air contact .
Q: What maintenance is required to prevent copper oxidation?
A: Regular inspection (every 8–12 months) for tarnish buildup is recommended. Cleaning with a mild acidic solution (pH 5–6) removes oxides without damaging the nickel-chromium plating.
Q: Can the evaporator be used with ammonia (R717) refrigerant?
A: Yes. A special brass fitting version is available, as ammonia is corrosive to pure copper. This variant includes monel alloy gaskets and meets IIAR safety standards for ammonia systems.
