Carbon Dioxide Detection and Indoor Air Quality Control

Area of Science:

• Building Science
• Environmental Engineering
• HVAC Systems

Background:

• Reducing building ventilation conserves energy by minimizing the need to condition outside air.
• Lowered ventilation rates can increase indoor carbon dioxide (CO2) levels, potentially impacting occupant comfort and health.
• Carbon dioxide concentration is a key indicator of indoor air quality and adequate fresh air supply.

Purpose of the Study:

• To investigate the efficacy of demand-controlled ventilation (DCV) systems in optimizing building energy efficiency and indoor air quality.
• To explore the use of carbon dioxide sensors in DCV systems for dynamic ventilation control.

Main Methods:

• Implementing DCV systems that utilize carbon dioxide sensors placed in building spaces or return air ducts.
• Adjusting fresh air ventilation rates in real-time based on measured CO2 concentrations.

Main Results:

• DCV systems effectively modulate ventilation rates according to real-time occupancy, indicated by CO2 levels.
• Energy savings are achieved by reducing the heating and cooling loads associated with unnecessary ventilation.
• Maintaining comfortable and safe indoor environments is possible even with variable ventilation rates.

Conclusions:

• Carbon dioxide sensor-based DCV systems offer a viable strategy for balancing energy conservation with occupant well-being.
• Dynamic adjustment of ventilation based on CO2 levels ensures adequate fresh air supply proportional to occupancy.
• These systems enhance HVAC efficiency while supporting a healthy indoor environment.