1. What is a Cooling Tower BTU Calculator?

Definition: This calculator estimates the heat removal capacity (in BTU/hr) of a cooling tower based on water flow rate, specific heat, and temperature difference.

Purpose: It helps HVAC engineers and facility managers determine the cooling capacity needed for their systems.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( BTU \) — Heat removal capacity (Btu per hour)
• \( m \) — Mass flow rate of water (pounds per hour)
• \( c \) — Specific heat of water (Btu per pound per °F)
• \( \Delta T \) — Temperature difference between inlet and outlet (°F)

Explanation: The formula calculates the energy required to change the temperature of the water flow by the specified amount.

3. Importance of BTU Calculation

Details: Accurate BTU calculation ensures proper cooling tower sizing, energy efficiency, and system performance.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What's the typical specific heat for water?
A: Water has a specific heat of about 1.0 Btu/lb·°F, but it can vary slightly with temperature and impurities.

Q2: How do I find the mass flow rate?
A: Multiply the volumetric flow rate (gallons per minute) by 500 (for water: 1 gpm ≈ 500 lb/hr).

Q3: What temperature difference should I use?
A: Use the difference between your cooling tower's inlet and outlet water temperatures (typically 10-30°F).

Q4: Does this account for evaporation losses?
A: No, this is a basic calculation. For precise results, consider evaporation and other factors.

Q5: Can I use this for other fluids?
A: Yes, but you must use the correct specific heat value for your fluid.