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Inner Grooved Copper Tubes for Air Conditioners

Inner grooved copper tubes are the core heat transfer components in condensers and evaporators of residential and commercial air conditioning systems. Through precision roll forming, spiral grooves are created on the inner wall, increasing the internal surface area by 30-50% compared to smooth tubes while disturbing refrigerant flow to break the boundary layer—significantly enhancing heat transfer efficiency.

Manufactured from high-precision copper strip, Kenergy's inner grooved tubes feature uniform wall thickness and complete tooth profiles. They are fully compatible with R32, R410A, and R22 refrigerants, making them the preferred choice for high-efficiency AC systems.

Inner Grooved Copper Tubes

Core Advantages

1
30-50% Heat Transfer Improvement

Compared to traditional smooth tubes, the internally grooved structure delivers a significantly higher heat transfer coefficient, helping you meet new energy efficiency standards with ease.

2
Customizable Groove Parameters

Fin height, helix angle, and tooth count can be tailored according to refrigerant characteristics and specific operating conditions for optimal performance.

3
Compatible with Mainstream Refrigerants

Optimized tooth profiles for R32, R410A, R134a, R22, and more. Our engineering team can fine-tune the design for alternative refrigerants upon request.

4
Excellent Expansion Performance

Wall thickness tolerance of ±0.02mm ensures compatibility with automatic tube expansion processes. No cracking or leaking during assembly.

Technical Parameters

Available outer diameters, wall thicknesses, and groove configurations. Custom specifications available upon request.

Outer Diameter (mm) Bottom Wall (mm) Fin Height (mm) Tooth Count Helix Angle (°) Weight (g/m) Heat Transfer Area (m²/m) Material
6.000.25–0.300.10–0.1540–5015–2542–500.021–0.024TP2, T2
7.000.25–0.320.12–0.1845–5515–2552–620.025–0.028TP2, T2
7.940.27–0.350.12–0.1845–6018&ndash>2863–750.028–0.032TP2, T2
9.520.30–0.400.14–0.2050–6518&ndash>2882–1000.034–0.039TP2, T2
12.700.35–0.500.15–0.2255–7020–30125–1600.045–0.052TP2, T2
15.880.40–0.550.16–0.2560–7520–30175–2200.056–0.065TP2, T2
19.050.45–0.600.18–0.2565–8020–30230–2800.068–0.078TP2, T2
25.400.50–0.700.18–0.2570–8020–30350–4300.090–0.103TP2, T2

Typical Applications

Split AC Condenser / Evaporator

Residential split and window air conditioners, from 1HP to 5HP capacity ranges.

Commercial VRF/VRV Systems

Multi-split variable refrigerant flow systems for commercial and light commercial buildings.

Heat Pump Water Heaters

Air-to-water and air-to-air heat pump heat exchangers for residential and commercial hot water.

Dehumidifiers & Portable ACs

Compact heat exchangers for dehumidifiers, mobile air conditioners, and specialty cooling equipment.

Frequently Asked Questions

Q: How much more expensive are inner grooved tubes compared to smooth tubes? Is it cost-effective?
Inner grooved tubes typically cost 10-20% more than smooth tubes of the same diameter and wall thickness. However, because they deliver 30-50% higher heat transfer efficiency, you can achieve the same thermal performance with fewer tubes or a smaller heat exchanger, potentially reducing overall system cost. The return on investment is particularly attractive for high-EER and inverter AC products.
Q: What special groove requirements does R32 refrigerant have?
R32 has a higher operating pressure than R410A and R22. For R32 applications, we recommend optimized groove profiles with slightly increased fin height and modified helix angle to enhance heat transfer while maintaining mechanical strength at elevated pressures. Kenergy has developed specific R32-optimized tube designs validated through extensive testing.
Q: Can inner grooved tubes be used in CO2 transcritical cycles?
Yes, with specific design considerations. CO2 transcritical systems operate at extremely high pressures (up to 130 bar). We offer reinforced inner grooved tube designs with thicker walls and specialized groove geometries for CO2 applications. These tubes are manufactured from high-strength copper alloys to ensure safe and reliable operation under transcritical conditions.
Q: What is the minimum order quantity (MOQ)?
For standard sizes and groove patterns, our MOQ is typically 500kg per specification. For custom groove designs or non-standard diameters, the MOQ is 1,000kg. Sample quantities (under 50kg) are available for qualification testing and prototype development. Please contact our sales team for detailed MOQ information based on your specific requirements.

Get a Quote & Sample for Inner Grooved Copper Tubes

Contact our technical team for pricing, specifications, and sample requests. We respond within 24 hours.

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