1. What is a Cooling Tower Size Calculator?

Definition: This calculator estimates the cooling tower capacity required based on water flow rate, specific heat, and temperature difference.

Purpose: It helps HVAC engineers and facility managers determine the appropriate cooling tower size for their systems.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( m \) — Water flow rate (gallons per minute)
• \( c \) — Specific heat of water (Btu/lb·°F)
• \( \Delta T \) — Temperature difference between inlet and outlet (°F)

Explanation: The formula calculates the heat removal capacity needed from the cooling tower based on system parameters.

3. Importance of Cooling Tower Sizing

Details: Proper sizing ensures efficient heat rejection, energy savings, and prevents system overload or underperformance.

4. Using the Calculator

Tips: Enter the water flow rate in GPM, specific heat (default 1.0 Btu/lb·°F for water), and temperature difference. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's the typical specific heat value for water?
A: Pure water has a specific heat of 1.0 Btu/lb·°F, but this may vary slightly with impurities or additives.

Q2: How do I measure the temperature difference?
A: Subtract the cooled water temperature (outlet) from the warm water temperature (inlet) going to the tower.

Q3: What flow rate should I use?
A: Use your system's design flow rate or actual measured flow through the cooling loop.

Q4: Why is capacity measured in tons?
A: In HVAC, 1 ton of cooling equals 12,000 Btu/hour, a standard measurement unit for cooling capacity.

Q5: Should I add a safety factor to the result?
A: Yes, consider adding 10-20% capacity margin for peak loads and system variations.