1. What is a Cooling Tower Heat Load Calculation?

Definition: This calculator determines the total heat load that must be removed by a cooling tower system, including both sensible and latent heat components.

Purpose: It helps HVAC engineers and facility managers properly size cooling tower systems for industrial and commercial applications.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Q \) — Total heat load (BTU)
• \( m \) — Water mass flow rate (lb)
• \( c \) — Specific heat of water (1.0 BTU/lb·°F)
• \( \Delta T \) — Temperature difference (°F)
• \( Q_{latent} \) — Latent heat load from evaporation (BTU)

Explanation: The sensible heat component is calculated from the temperature change, while the latent heat accounts for phase change energy.

3. Importance of Cooling Tower Calculations

Details: Accurate heat load calculations ensure proper cooling tower sizing, energy efficiency, and reliable operation of cooling systems.

4. Using the Calculator

Tips: Enter water mass flow rate, specific heat (default 1.0 BTU/lb·°F for water), temperature difference, and any latent heat load (default 0). All values must be ≥ 0.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between sensible and latent heat?
A: Sensible heat changes temperature, while latent heat changes state (evaporation/condensation).

Q2: When is latent heat significant?
A: In evaporative cooling towers where water evaporation contributes significantly to heat rejection.

Q3: How do I find the mass flow rate?
A: Measure flow rate in GPM and multiply by 8.33 lb/gal (for water).

Q4: What's a typical temperature difference?
A: Typically 10-20°F for cooling towers, but depends on design.

Q5: How does this relate to cooling tower tons?
A: 1 cooling tower ton = 15,000 BTU/hr. Divide Q by 15,000 to estimate tons required.