Spiralx Internet

Heat Exchanger Technology, LLC Cooling Viscous Fluids with Forced Convective Heat Transfer using fin tubes April 2010

Heat Exchanger Technology, LLC AGENDA
Viscous Fluids
Definition of Viscosity
Definition of Laminar
Technology as of March 2010
Description
History
Testing Apparatus
Test Results
Improvement on Prior Art
Hypothesis
Process
Test Results
Conclusions
Technology after March 2010
SpiralX
Patent Status
How it Works
Test Results
Benefits

Heat Exchanger Technology, LLC Viscous Fluids Definition of Viscosity Viscosity: The tangential force required to move one horizontal plane with respect to the other at one unit velocity when maintained a unit distance apart by the fluid The sheering stress between layers of a non-turbulent fluid moving in straight parallel lines can be defined as: Newton’s Law of Friction

Heat Exchanger Technology, LLC Viscous Fluids Definition of Laminar Laminar flow generally happens when dealing with small pipes and low flow velocities. Laminar flow can be regarded as a series of liquid cylinders in the pipe, where the innermost parts flow the fastest, and the cylinder touching the pipe isn't moving at all. The Reynolds number is important in analyzing any type of flow when there is substantial velocity gradient (i.e. shear.) It indicates the relative significance of the viscous effect compared to the inertia effect. The Reynolds number is proportional to inertial force divided by viscous force . The flow is laminar when Re < 2300 transient when 2300 < Re < 4000 turbulent when 4000 < Re

Heat Exchanger Technology, LLC
The Twisted Ribbon “Turbulator”
1” tube 5 inch pitch
5/8” tube 2 ½ inch pitch
Cold rolled steel
Technology as of March 2010

Heat Exchanger Technology, LLC
Inventor
J.D. Isaacs & J. B. Speed
January 2, 1906
US 808752
History as of March 2010

Heat Exchanger Technology, LLC Testing Process Precision: Temperature +/- .1F Pressure 2% Flow 1% Regression Error .02%

Heat Exchanger Technology, LLC Test Results for Spiral Turbulator for a 1” tube
Inside Film Coefficients
Low lb/tube-hr 39-43
Medium lb/tube-hr 46-50
High lb/tube-hr 52-55
Overall Rate U
Low lb/tube-hr 35-40
Medium lb/tube-hr 42-46
High lb/tube-hr 46-52

Heat Exchanger Technology, LLC Improvement on Prior Art Hypothesis
“ To increase the inside film coefficient, highly viscous fluids need to become more turbulent”
Support for Hypothesis
US1056373, US1242975, US1246583, US1272113, US1322746,US1349571
US1459024, US1540535, US1707812, US1770208, US1948064, US1961744
US2064080, US2070427, US2078104, US2144506, US2151887, US 16 more +
Argument against Hypothesis
“ despite claims of great performance improvement, none of these designs ever made it to industry”

Heat Exchanger Technology, LLC Examples of Prior Art

Heat Exchanger Technology, LLC Improvement on Prior Art Test Process
Comparison Criteria
Baseline: Twisted Ribbon 5” pitch
Values
Inside Film Coefficient
Pressure Drop
Thermal Efficiency
Prior Art Improvements Tested
Twisted Ribbon modifications
Spring and Wire turbulators
Twisted Ribbon Pitch Variance

Heat Exchanger Technology, LLC Improvement on Prior Art Test Results Modified Ribbon Wire Spring Ribbon Film Coefficient Pressure Drop Thermal Efficiency

Heat Exchanger Technology, LLC Improvement on Prior Art Conclusions
Modifications to the Twisted Ribbon added NO improvement to the film coefficient and increased pressure drop.
Most wire designs decreased the film coefficient and increased pressure drop
Spring Designs dramatically reduced film coefficient and increased pressure drop.
Changing the pitch on the 1907 twisted ribbon increased film coefficients at very high flow rates, not much at low flow rates, and increased pressure drop

Heat Exchanger Technology, LLC Technology after March 2010 Patent Pending TM

Heat Exchanger Technology, LLC Patent Status TM
Over 100 Legal Hours creating non-provisional utility patent
Filed with US Patent Office April 2010
Filing Internationally with 80 WIPO countries
Officially Patent Pending

Heat Exchanger Technology, LLC Test Results TM U (btu/hr-sq ft-F) 1906 Twisted Ribbon Change Low Flow 35-40 84-96 140% Medium Flow 42-46 101-112 141% High Flow 46-52 114-118 148%

Heat Exchanger Technology, LLC Design Benefits TM 1906 Twisted ribbon 12 x .16 = 1.92sq.ft BTS 2010 SpiralX 4 x .26 = 1.04sq. ft BTS 1906 Twisted ribbon 8 x .26 = 2.08sq. ft BTS

Heat Exchanger Technology, LLC Rating Benefits TM Traditional 1906 Design Number of Passes

Heat Exchanger Technology, LLC Rating Benefits TM SpiralX 2010 Design Pitch/diameter

Heat Exchanger Technology, LLC Consumer Benefits TM Up to 50% less foot print Up to 50% less energy required Greater than 50% less noise pollution SpiralX are removable Minimum Fouling Can be changed for changing conditons

Heat Exchanger Technology, LLC Going Forward TM Continue to collect data for Viscous Fluids Develop data for 5/8” and ¾” tubes Develop SpiralX for low pressure air Develop SpiralX for Natural Gas Services

Heat Exchanger Technology, LLC TM Questions

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