Formula Used:
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Definition: This calculator estimates the number of tubes that can fit in a heat exchanger bundle with four-pass square pitch configuration based on bundle diameter and tube outer diameter.
Purpose: It helps heat exchanger designers and engineers determine tube counts for efficient heat transfer surface area.
The calculator uses the formula:
Where:
Explanation: The formula is an empirical relationship that accounts for the geometric arrangement of tubes in a square pitch pattern with four passes.
Details: Accurate tube count estimation ensures proper heat transfer area, fluid flow distribution, and mechanical integrity of the heat exchanger.
Tips: Enter the bundle diameter and pipe outer diameter in meters. Both values must be > 0.
Q1: What is four-pass square pitch configuration?
A: It's a tube arrangement where tubes are laid out in a square pattern with the fluid making four passes through the tube bundle.
Q2: Why is the exponent 2.263 used in the formula?
A: This empirical exponent accounts for the geometric packing efficiency of tubes in a square pitch arrangement.
Q3: How accurate is this calculation?
A: It provides a good estimate, but actual tube counts may vary slightly based on specific design constraints and tube support arrangements.
Q4: Can this be used for triangular pitch arrangements?
A: No, this formula is specific to square pitch configurations. Triangular pitch would require a different formula.
Q5: What's a typical range for bundle diameters?
A: Bundle diameters typically range from 0.1m for small heat exchangers to over 2m for large industrial units.