®
™
A metal surface technology for enhanced heat transfer.
ENHANCED SURFACES AND HEAT EXCHANGE DESIGN.
Various industries are aggressively working to incorporate enhanced heat transfer
surface technology into their designs. Virtually every heat exchange device is a
potential candidate for enhanced heat transfer.
Vipertex® differs from smooth surface tubes by:
• Increasing
the process surface area
• Interrupting
• Increasing
the degree of turbulence
• Generating
• Increasing
the development of the boundary layer
rotating secondary flows
the rate of heat transfer
• Lowering
required flow rates = reduced power requirements
• Providing
a smaller heat exchanger footprint
Vipertex® is the Heat Transfer division of Rigidized® Metals Corporation – a company backed by
more than 70 years of experience in deep-textured metals, renowned dependability, and
unsurpassed customer service. Plus, with global distribution, you can count on Vipertex® to
deliver, no matter where your project is located.
VIPERTEX® INCORPORATES MULTIPLE SURFACE ENHANCEMENTS
Vipertex® has the ability to offer multiple enhancements engineered to the application, differing significantly from
a single solution enhancement.
Surface enhancement depends on the application. A heating application may differ from a cooling application,
thus, an enhancement may be desired on one or both sides of the surface.
1EHT
2EHT
1HB
VIPERTUBE®: TAKING TUBE TECHNOLOGY TO THE NEXT LEVEL.
Vipertube® utilizes the advantages of the Vipertex®-enhanced surfaces. Vipertube® is
manufactured for the highest level of quality in high-pressured tubing. Since every
application is different, Vipertube® can be customized to meet your needs – including a
variety of alloys and sizes, electro-polishing, bending, and coiling capabilities.
Inside views of Vipertex®
stainless tubes
1EHT
4EHT
IDEAL FOR ALL INDUSTRIES:
• Oil
and gas
• Power
• Petrochemical
generation
• Food
Processing
• HVAC • Alternative
• Chemical• Process
Coil
Twisted Tape
Enhanced Outside Surface
• Hot
Energy
Water Tanks
U-Tube
Fin Tube
Bundles
VIPERTUBE® SPECIFICATIONS:
• Available
diameters…………………………0.375–2.0 in. (9.525–25.4 mm), alloy dependent
• Wall
thicknesses……………………...........Various wall thicknesses available, alloy dependent
• Core
Materials……………………………... Stainless steel, carbon, copper and aluminum
• Additional
• Can
alloys available
be manufactured to ASTM specifications
VIPERTUBE® VS. SMOOTH TUBES - INCREASED HEAT TRANSFER
Condensation
Evaporation
Comparison of the HTC of the Vipertex® 1EHT enhanced heat
transfer tube and a smooth tube in two-phase applications
Comparison of the HTC of the Vipertex® 1EHT and a smooth tube in
R410a for two-phase flow
HTC w/(m^2*K)
4500
5500
Vipertube® 1EHT
smooth tube
5000
4500
HTC w/(m^2*K)
4000
3500
Vipertube® 1EHT
smooth tube
4000
3500
3000
2500
2000
3000
1500
2500
0
2000
0
3000
4000
5000
6000
7000
8000
Reynolds Number
1500
1000
0
0
3000
4000
5000
6000
7000
8000
9000
10000
11000
Single Phase Cooling
Ratio of heat transfer in the Vipertex® 1EHT enhanced tube to
that in a smooth tube in single-phase applications
Heat Transfer Under
Fouling Conditions
2.5
Vipertube® 1EHT/Smooth
7.0
Numeas / Nupred,PT
Weight Gain from Fouling (g)
Reynolds Number
Vipertube® 1EHT
smooth tube
2
1.5
1
5.0
4.0
3.0
0.5
2.0
0
1.0
0
10
20
30
40
50
60
70
Time (d)
80
90
100
Local maximum 545 %
increase in heat transfer
6.0
For higher flows,
increases in heat
transfer level off
to about 85%
0
1.00E+01
1.00E+02
1.00E+03
1.00E+04
1.00E+05
Reynolds Number
The difference is clear. Vipertube® outperforms — and is a significant upgrade over — standard smooth tubes.
HARNESS THE POWER OF VIPERTEX® TODAY.
For more information on Vipertex® products, including enhanced heat transfer tubes and surfaces, fins, solar
surfaces, and heat sinks, contact 800.836.2580 or info@vipertex.com.
®
658 Ohio Street, Buffalo, New York 14203 www.vipertex.com