For Air Conditioning, Refrigeration and Freezer Applications or
Other Heat Transfer Applications

Click here for printer friendly version.

· Alloys Available

UNS C12200, DHP Copper only.  CU 99.9% Minimum, P 0.015 to 40%

· Application Standards

ASTM B447

· Product Formats Available

Level Wound Coils on Fiberboard Reels, or Bulk Pack and Banded.  Coils are stacked on pallets and packaged in Tubular Corregated Fiberboard Containers, or may be shrink wrapped.

· Tempers Available

ASTM O60 (0.040 to 0.080 Average Grain Size)
ASTM O50 (0.015 to 0.040 Average Grain Size)

· Testing

All Turbo-ASG and Turbo-AXG are 100% eddy current tested, as well as subject to a series of other destructive and nondestructive tests at various points along the production line.

 

Maximum Your Product and Production Performance

Turbo-ASG and Turbo-AXG are Wolverine's latest welded inner groove products for evaporator and condenser coil use in either air conditioning or refrigeration applications.  Both products are produced at the welded tube facility in Jackson, Tennessee.

Turbo-ASG is a high frequency welded tube that offers the thermal performance you expect from standard inner groove designs, like Turbo-A, plus the consistent bending and expanding characteristics you need for efficient coil production.

Turbo-AXG is a welded cross-cut, internally enhanced product which provides industry leading performance for condenser coil applications.

Our high frequency welding process produces copper tube with uniform grain size throughout the weld and non-weld regions.  The result is a pressure capability similar to that of seamless tubes with excellent dimensional characteristics.  In addition, tubes can be formed with bottom wall ranging from 0.011 inch to 0.024 inch.

 

Turbo-A and Turbo-ASG Performances
Click on the appropriate units system below to view the performance graphs of a specific tube size and refrigerant.
 
Tube Size
inch (mm)		 Refrigerant
0.28 (7.0) 22
5/16 (7.94) 22
5/16 (7.94) 410a
3/8 (9.53) 22
3/8 (9.53) 410a

 

EXPERIMENTAL APPARATUS:

 
· Test Section Counter flow tube-in-tube heat exchanger
· Effective Length 12 feet
· Refrigerants Tested R-22, R-134a, R-407c, R410a
· Fluid on Annulus Water
· Tubes Tested  Smooth ID, Turbo-A, Turbo-ASG, Turbo-AXG

 

TEST CONDITIONS:
 
  Evaporation Condensation

Test Temperature     (o F)

33 - 37

100 - 105

Inlet Vapor Quality (%)

10, ± 1

80, ± 3

Exit Vapor Quality (%)

80, ± 3

10, ± 3

Test flow rate (lb/hr)

60 - 200 in steps of 20 for 3/8"
40 - 160 in steps of 20 for 5/16"
30 - 150 in steps of 30 for 7 mm

100 - 500 in steps of 100 for 3/8"
80 - 400 in steps of 80 for 5/16"
60 - 300 in steps of 60 for 7 mm

Water flow rate (lb/hr)

900 - 1800

1200 - 2400

Minimum water temperature difference  (o F)

3

3

 

INTUBE HEAT TRANSFER COEFFICIENT CALCULATION:
 
Heat Transfer Rate: Q = [m Cp (Ti - To)]water
Overall Coefficient: Uo = Q / Ao / LMTD
Annulus Coefficient: ho = Co (k / Dh) (Re)0.8 (Pr)1/3 (m / mw)
Intube Heat Transfer Coefficient: hi = [1 / (1 / Uo - 1 / ho - Rw)] (Ao / Ai)

 

STANDARD SIZES:
 
Turbo-ASG
Catalog Number Outside Diameter inch (mm) Bottom Wall inch (mm) Number of Ridges
(N) 		Ridge Height inch (mm) Helix Angle degree (H) Weight Per Unit Length
(lb/ft)
364-12761008-122 0.276 (7.01) 0.010 (0.254) 54 0.008 (0.203) 18 0.0406 (0.060)
364-23121208-122 0.312 (7.92) 0.012 (0.305) 50 0.008 (0.203) 18 0.0535 (0.080)
364-33751208-122 0.375 (9.53) 0.012 (0.305) 60 0.008 (0.203) 18 0.0632 (0.094)

 

Turbo-AXG
Catalog Number Outside Diameter
inch (mm) 		Bottom Wall inch (mm) Number of Ridges
(N) 		Ridge Height inch (mm) Helix Angle degree (H) Weight Per Unit Length
lb/ft (kg/m)
361-2761008-122 0.276 (7.01) 0.010 (0.254) 54 0.008 (0.203) 18* 0.0406 (0.060)
361-3751208-122 0.375 (9.53) 0.012  (0.305) 60 0.008 (0.203) 18* 0.0632 (0.094)
*Note - Cross Groove Helix Angle - 71o (Perpendicular to ASG Helix) - Not Shown

 

 

 
Tolerances: Outside Diameter ± 0.002" Average
Bottom Wall Up to 0.017", inclusive ± 0.001" AAP
Ridge Height ± 0.001" AAP
Helix Angle (Ho) ± 2o
Weight ± 4%
 
Other sizes and wall thickness may be available.
Tube Form: Level wound coil only.
 

 

SPECIFICATIONS FOR TURBO-ASG AND TURBO-AXG INNER RIDGED COPPER TUBE
 
   
  Mechanical Properties:
  Tensile Strength Minimum psi - 30,000 (207 MPa) 
  Yield Strength Minimum psi - 9,000 (62 MPa) 
  Elongation in 2" (50.8 mm) Minimum 40%
  Grain Size 0.015 - 0.040 mm
   
  Cleanliness and Appearance:

Tubes are clean and bright on the inside and outside surfaces, free from silvers, scale, open grain and major metal defects, such as inclusions.  Any residue on the inside of the tube will not exceed 0.0035 g/ft2 (0.0377 g/m2).

   
  Dimensions:
 

24" (609.6mm) ID x 33/38" (838/965 mm) OD x 10" (254.0 mm) wide coil.  Reels have arbor hole with 5" (127.0 mm) diameter.  Overall reel diameters are 38" (965.2 mm) or 41" (1041.4 mm).

   
  Marking:
  Shipping Labels on the outside of each package include the following items.
    Dimensions of the tube Customer's part number or tagging information
    Weight of tube Name of manufacturer
    Customer's order number Production order number
       

 

NOMENCLATURE:
 
Ai Inside area of test tube on  (ft2) m Viscosity of water at average  [lb/(ft hr)]
inside diameter water temperature
Ao Outside area of test tube (ft2) mw Viscosity of water at wall [lb/(ft hr)]
Co Sieder & Tate Constant for  temperature
annulus found by using a Pr Prandtl number of water at
Wilson plot method average water temperature
Cp Specific Heat [Btu/(lb o F)] Q Heat Rate (Btu/hr)
Dh Annulus hydraulic diameter (ft) Re Reynolds number of water at
hi Inside heat transfer coefficient [Btu/(hr ft2 o F)] average water temperature
ho Annulus heat transfer coefficient [Btu/(hr ft o F)] Rw Wall Resistance (hr ft2 o F/Btu)
k Thermal conductivity of water [Btu/(hr ft o F)] Ti Water inlet temperature (o F)
LMTD Logarithmic Mean Temperature (o F) To Water outlet temperature (o F)
Difference Uo Overall heat Transfer coefficient [Btu/(hr ft2 o F)]
m Flow Rate (lb/hr)

 

WHTFT Rev. 3 12/00