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External Flow Analysis
     
 

Heat transfer analysis and calculation of outlet temperatures

Capabilities

Rating (Performance Analysis)
Calculation of Q, U, and outlet temperatures
Calculation of heat transfer surface
Calculation of core height, core width (for a specified heat load)
Calculation of flow rates (for a specified heat load)
Sizing
With respect to core height, weight, width, and flow rates or a combination of these variables.
Optimization
With respect to core height, width, and flow rates or a combination of these variables. The program evaluates all viable configurations within the limits that you provide to arrive at a number of feasible solutions listed in the order in which they satisfy an optimization criterion. Criteria include minimum pressure drop, minimum heat transfer surface area, minimum power, or a combination of these.
Phase Change Capabilities
Single-Phase Analysis
Two-Phase Analysis
Non-condensable
Module Intergration
INSTED/Database modules used:

Fluid thermophysical properties
Thermal conductivity of the exchanger material
Fouling resistance data
Friction factor calculation

Links to the Fin Analysis program for calculation of fin resistance and efficiency
Fin Types
Rectangular, Triangular, Trapezoidal, and Wavy. Custom fin types can be supplied in the form of j/f characteristic curves.
Fin Profiles
Plain, Serrated, and Herringbone. Custom fin types can be supplied in the form of j/f characteristic curves.

Program Interaction

Required Input for Rating Analysis
Core height, core width, number of plates, plate thickness, plate thermal conductivity
For each stream:
Fin profile, Thickness in passage, Height in passage, Pitch, Fin thermal conductivity, K-factor, Fluid density, Specific heat, Viscosity, Thermal conductivity, (or a fluid selection from the INSTED/Database)
Results from Rating Analysis
Total heat transfer rate
Total heat transfer area
U, UA
Effectiveness
Meant temperature difference
NTU
For each stream:
Outlet temperature
Colburn factor
Velocity
Reynolds number
Friction factor
Pressure loss
Power
Results from Sizing Analysis
A design realization, showing the number of plates, heat transfer area, pressure losses, flow rates, and dimensions satisfying the sizing requirements.
Results from Optimization Analysis:
Several design realizations as a function of:

The number of plates
The heat tranfer rate
The pressure losses
The flow rates
The geometric dimensions (core height and width)

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