1. What is Number of Tubes in Two Pass Square Pitch?

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

Purpose: It helps heat exchanger designers determine the optimal tube count for given dimensions.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( NTubes \) — Number of tubes in the bundle
• \( DB \) — Bundle diameter (meters)
• \( DOuter \) — Pipe outer diameter (meters)

Explanation: The formula is an empirical relationship that estimates tube count based on the ratio of bundle diameter to pipe diameter.

3. Importance of Tube Count Calculation

Details: Proper tube count estimation ensures efficient heat transfer, proper fluid flow, and optimal use of available space in the heat exchanger.

4. Using the Calculator

Tips: Enter the bundle diameter and pipe outer diameter in meters. Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is two-pass square pitch configuration?
A: It's a tube arrangement where tubes are laid out in a square pattern and the fluid makes two passes through the exchanger.

Q2: How accurate is this formula?
A: It provides a good estimate but actual tube count may vary based on specific design constraints and manufacturing tolerances.

Q3: Can this be used for other tube arrangements?
A: No, this formula is specific to two-pass square pitch configuration. Other arrangements require different formulas.

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

Q5: Does this include space for baffles and supports?
A: No, additional space considerations may be needed for these components in the actual design.