1. What is a Chilled Water Pipe Sizing Calculator?

Definition: This calculator determines the required pipe diameter for chilled water systems based on flow rate and velocity.

Purpose: It helps HVAC engineers and designers properly size pipes to ensure efficient chilled water distribution.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( D \) — Pipe diameter (meters)
• \( Q \) — Flow rate (cubic meters per second)
• \( v \) — Water velocity (meters per second)

Explanation: The formula calculates the minimum pipe diameter needed to maintain the desired flow rate at the specified velocity.

3. Importance of Proper Pipe Sizing

Details: Correct pipe sizing ensures efficient system operation, minimizes pressure drops, and prevents excessive pumping costs.

4. Using the Calculator

Tips: Enter the flow rate in m³/s and desired velocity in m/s (default 1.5 m/s). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's a typical velocity for chilled water pipes?
A: 1.2-2.4 m/s is common, with 1.5 m/s often used as a design standard.

Q2: How do I convert flow rate from L/s to m³/s?
A: Divide liters per second by 1000 (1 L/s = 0.001 m³/s).

Q3: When would I use a higher velocity?
A: Higher velocities may be used in large systems to reduce pipe sizes, but consider increased pressure drops.

Q4: What about pipe material and roughness?
A: This calculator provides theoretical diameter. Actual sizing should consider material, insulation, and system specifics.

Q5: Does this account for pressure drop?
A: No, this is a basic sizing calculator. Detailed design should include pressure drop calculations.