Odor Smell Persons Air Ventilation

Overview

Engineering reference data for Odor Smell Persons Air Ventilation in HVAC systems.

Key Formulas

Sensible Heat

$Q = \dot{m} c_p \Delta T$

Heat causing temperature change.

Latent Heat

$Q = \dot{m} h_{fg} \Delta\omega$

Heat causing moisture change.

COP (Cooling)

$COP = Q_c / W$

Coefficient of performance.

Variables

Design Objectives for Odor Control

The primary goal of make-up air ventilation is to dilute and remove contaminants to maintain acceptable indoor air quality. For odor control specifically, this involves:

• Maintaining Minimum Oxygen Levels: Ensuring a sufficient supply of fresh air to support occupant health and comfort.
• Controlling Carbon Dioxide (CO₂): Preventing CO₂ levels from rising to points that cause drowsiness or discomfort, as it is a good proxy for overall air freshness.
• Managing Occupant Odors: Diluting bioeffluents and other odorants released by occupants to levels below the threshold of perception or complaint.

Activity-Based Ventilation Requirements

Ventilation rates must be adjusted based on the metabolic activity level of the occupants, as higher activity increases CO₂ and odor generation rates.

Unit Conversion

A standard conversion factor for air volume is:

$1 \, \text{m}^3 = 35.31 \, \text{ft}^3$

This is essential for applying ventilation formulas, which may be based on either metric (SI) or imperial units.

References

• Original Source