Total Heat Removed from Ventilation Air Calculator

Formula Used:

\[ Q_t = Q_s + Q_{lv} \]

Total Heat Removed from Ventilation Air: W

1. What is Total Heat Removed from Ventilation Air?

Definition: This is the total heat energy removed from conditioned space that is added due to heat gain by ventilation air.

Purpose: It helps HVAC professionals determine the cooling load requirements for proper system sizing and energy efficiency.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ Q_t = Q_s + Q_{lv} \]

Where:

\( Q_t \) — Total heat removed from ventilation air (Watts)
\( Q_s \) — Sensible cooling loads from ventilation air (Watts)
\( Q_{lv} \) — Latent cooling loads from ventilation air (Watts)

Explanation: The total heat removal is the sum of sensible heat (temperature change) and latent heat (moisture change) components.

3. Importance of Heat Removal Calculation

Details: Accurate calculation ensures proper HVAC system sizing, energy efficiency, and occupant comfort in conditioned spaces.

4. Using the Calculator

Tips: Enter sensible and latent cooling loads in Watts. The ±5% indicates typical measurement tolerances in HVAC calculations.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between sensible and latent heat?
A: Sensible heat affects temperature, while latent heat involves moisture content changes (humidity).

Q2: Why is there a ±5% tolerance?
A: This accounts for typical measurement variations and system efficiency fluctuations in real-world conditions.

Q3: How do I determine sensible and latent loads?
A: Use psychrometric calculations or specialized HVAC load calculation software.

Q4: Does this include other heat sources?
A: No, this only calculates heat from ventilation air. Other sources (occupants, equipment) require separate calculations.

Q5: What units should I use?
A: This calculator uses Watts, but BTU/hr conversions are common in HVAC (1 W = 3.412 BTU/hr).