Jacket Width Calculator

Jacket Width Formula:

\[ w_j = \frac{D_{ij} - OD_{Vessel}}{2} \]

Jacket Width (mm):

With Tolerance (mm):

1. What is a Jacket Width Calculator?

Definition: This calculator determines the width of a jacket space between a vessel and its surrounding jacket based on their diameters.

Purpose: It helps engineers and designers calculate the proper jacket width for heat transfer surfaces in pressure vessels.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ w_j = \frac{D_{ij} - OD_{Vessel}}{2} \]

Where:

\( w_j \) — Jacket width (mm)
\( D_{ij} \) — Inside diameter of jacket (mm)
\( OD_{Vessel} \) — Outer diameter of vessel (mm)

Explanation: The difference between the jacket inside diameter and vessel outer diameter is divided by 2 to get the uniform width around the vessel.

3. Importance of Jacket Width Calculation

Details: Proper jacket width ensures efficient heat transfer, adequate flow of heating/cooling media, and structural integrity of the vessel-jacket system.

4. Using the Calculator

Tips: Enter the inside diameter of the jacket and outer diameter of the vessel in millimeters, plus the tolerance percentage (default 5%). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical jacket width?
A: Common jacket widths range from 50mm to 300mm depending on the application and heat transfer requirements.

Q2: Why include a tolerance value?
A: Tolerance accounts for manufacturing variations and thermal expansion. ±5% is common but may vary by application.

Q3: How does jacket width affect heat transfer?
A: Narrower jackets increase fluid velocity and heat transfer coefficient but may require higher pumping power.

Q4: What if my vessel isn't cylindrical?
A: This calculator assumes cylindrical geometry. For other shapes, consult specialized design guides.

Q5: Can I use this for double pipe heat exchangers?
A: Yes, the same principle applies to annular spaces in double pipe designs.