Number of Tubes in Six Pass Triangular Pitch given Bundle Diameter Calculator

Formula:

\[ N_{Tubes} = 0.0743 \times \left( \frac{D_B}{D_{Outer}} \right)^{2.499} \]

Number of Tubes (N_Tubes):

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1. What is Number of Tubes in Six Pass Triangular Pitch?

Definition: This calculator estimates the number of tubes that can fit in a heat exchanger bundle with six-pass triangular pitch configuration based on bundle diameter and pipe outer diameter.

Purpose: It helps mechanical engineers and heat exchanger designers determine the optimal tube count for efficient heat transfer.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ N_{Tubes} = 0.0743 \times \left( \frac{D_B}{D_{Outer}} \right)^{2.499} \]

Where:

\( N_{Tubes} \) — Number of tubes in the heat exchanger
\( D_B \) — Bundle diameter (m)
\( D_{Outer} \) — Pipe outer diameter (m)

Explanation: The formula is an empirical relationship that accounts for the geometric arrangement of tubes in a triangular pitch configuration with six passes.

3. Importance of Tube Count Calculation

Details: Proper tube count estimation ensures optimal heat transfer efficiency, proper fluid flow distribution, and mechanical stability of the heat exchanger.

4. Using the Calculator

Tips: Enter the bundle diameter and pipe outer diameter in meters. Both values must be > 0. The result will be rounded to the nearest whole number in practical applications.

5. Frequently Asked Questions (FAQ)

Q1: What is triangular pitch in heat exchangers?
A: Triangular pitch refers to the arrangement where tubes are positioned in equilateral triangles, which provides more tubes per unit area compared to square pitch.

Q2: Why six-pass configuration?
A: Six-pass configuration increases fluid velocity and heat transfer coefficient by making the fluid pass through the heat exchanger six times.

Q3: How accurate is this formula?
A: This empirical formula provides a good estimate but actual tube counts may vary based on specific design constraints and manufacturing tolerances.

Q4: What's a typical bundle diameter range?
A: Bundle diameters typically range from 0.1m for small heat exchangers to over 2m for large industrial units.

Q5: Does this include tube sheet limitations?
A: No, additional calculations may be needed to account for tube sheet thickness and hole patterns.