Sensible Cooling Load due to Equipment Calculator

Sensible Cooling Load Formula:

\[ Q_{ph} = \frac{Q_T}{LF} \]

Sensible Cooling Load (Qph): W

1. What is Sensible Cooling Load due to Equipment?

Definition: Sensible cooling load is the heat added or removed from conditioned space by means of roof, ceiling, floor or windows specifically caused by equipment operation.

Purpose: It helps HVAC professionals determine the cooling capacity needed to maintain comfortable indoor temperatures when accounting for heat generated by equipment.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ Q_{ph} = \frac{Q_T}{LF} \]

Where:

\( Q_{ph} \) — Sensible cooling load (Watts)
\( Q_T \) — Total cooling load (Watts)
\( LF \) — Latent factor (dimensionless, typically 1.25)

Explanation: The total cooling load is divided by the latent factor to isolate the sensible cooling component.

3. Importance of Sensible Cooling Load Calculation

Details: Proper calculation ensures HVAC systems are properly sized to handle equipment heat gain while maintaining energy efficiency.

4. Using the Calculator

Tips: Enter the total cooling load in Watts and latent factor (default 1.25 ±5%). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between sensible and latent cooling?
A: Sensible cooling affects dry-bulb temperature, while latent cooling affects moisture content (humidity).

Q2: Why is the latent factor typically 1.25?
A: This accounts for the typical ratio between total cooling and sensible cooling in standard applications.

Q3: When would I change the latent factor?
A: Adjust for spaces with unusual humidity levels or special equipment that generates more/less moisture.

Q4: How do I find the total cooling load?
A: Use manual calculations, load calculation software, or rule-of-thumb estimates based on equipment specifications.

Q5: Does this include safety factors?
A: No, consider adding 10-20% to the calculated load for system capacity.