1. What is a BTU Calculator for Cooling?

Definition: This calculator estimates the total cooling energy required, including both sensible heat (temperature change) and latent heat (humidity removal).

Purpose: It helps HVAC professionals and engineers determine the cooling capacity needed for air conditioning systems.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Q \) — Total cooling energy (BTU)
• \( m \) — Mass of air (pounds)
• \( c \) — Specific heat capacity (BTU/lb·°F)
• \( \Delta T \) — Temperature change (°F)
• \( Q_{latent} \) — Latent heat for humidity removal (BTU)

Explanation: The formula calculates both the energy needed to change air temperature (sensible heat) and the energy needed for dehumidification (latent heat).

3. Importance of Cooling Energy Calculation

Details: Accurate BTU calculation ensures proper HVAC system sizing, energy efficiency, and effective humidity control in conditioned spaces.

4. Using the Calculator

Tips: Enter the mass of air, specific heat capacity (default 0.24 BTU/lb·°F for dry air), temperature change, and latent heat (if any). 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 moisture content without temperature change.

Q2: How do I find the mass of air?
A: Multiply air volume (cubic feet) by 0.075 lb/ft³ (standard air density).

Q3: When would latent heat be significant?
A: In humid climates or spaces with high moisture generation (e.g., pools, kitchens).

Q4: What's a typical ΔT for AC systems?
A: Usually 15-20°F between return and supply air, but varies by system.

Q5: How many BTUs equal one ton of cooling?
A: 12,000 BTU = 1 ton of cooling capacity.