China Inner Groove Aluminum Tube

Inner groove aluminum tube

1. Material:3003/3103 alloy grade
2. Production technology: extrusion and drawings
3. Application: Heat exchanger system Aluminum inner groove tube
Parameter for aluminum inner groove tube

SpecificationBottom wall thicknessgroove heightgroove numberhelix angleGroove top angleWeight per meterø7mm0.4-0.50.05-0.1840-5018º50°28±3ø9.520.45-0.550.05-0.1845-5518º50°45±3ø7.940.4-0.50.05-0.1840-5018º50°40±3

3003 inner groove tube
Specification of mechanical parameter
1. Tensile strength:≥120MPA
2. Elongation ≥35%
3. Expanding ≥40%
4. Density:2.7
3103 inner groove aluminum tube VS inner smooth copper tube
Samples: A an B

ItemInner smooth copper tube (A)Inner groove aluminum tube (B)OD/mm77Wall thickness0.30.47Height /mm-0.15Groove top angle-60Helix angle-18Groove number-55mm²/cm201.06291.63D/mm0.30.62W/mm00.14

The heat transfer performance
1.evaporation testing value & conclusion.

From the chart, we can do the conclusion that
(a).heat transfer coefficient
Aluminum inner groove tube is double compare to copper smooth tube
(b).thermal conductivity
We know aluminum thermal conductivity just only 60% of copper thermal conductivity. But aluminum inner groove tube's heat transfer coefficient of inner surface which is more than 2 times of copper smooth tube.
The conclusion is that aluminum groove tube has micro fin slot which provides evaporation condition and strengthens flow boiling heat transfer.
2. Condense testing value & conclusion

From the chart we can do a conclusion as below:
Condenser inside is mainly based on condensing and heat transfer, from the chart, you can see inner surface formed coastal teeth make Gregory effect more strongly.
Uneven distribution of condensate film can decrease heating resistance and help heating transferring also and heating transfer coefficient is highly more than the smooth copper tube.
Inner groove tube certification

Inner groove tube application
widely used in air conditioning and refrigeration system and any heat exchanger products like condensing coils, cooling coils, aluminum fin coils, etc.

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