A Wireless Gas Sensor Network to Monitor Indoor Environmental Quality in Schools

Area of Science:

• Environmental Science
• Building Technology
• Public Health

Background:

• Schools are densely occupied indoor spaces where children are vulnerable to poor environmental conditions.
• Indoor environmental quality (IEQ), including air quality and thermal comfort, significantly impacts student health, performance, and well-being.
• Many school buildings lack automated HVAC systems and adequate IEQ monitoring.

Purpose of the Study:

• To investigate the capabilities of a novel wireless gas sensor network for monitoring IEQ parameters in classrooms.
• To assess the feasibility of maintaining adequate IEQ levels in school environments.
• To determine the necessity of individual room monitoring and control for optimizing IEQ and energy savings.

Main Methods:

• Deployment of a wireless gas sensor network utilizing photoacoustic detectors for measuring carbon dioxide (CO2), temperature, and humidity.
• Data transmission via Z-Wave protocol to a central gateway for web-based online analysis.
• Evaluation of IEQ levels in classrooms under various ventilation conditions.

Main Results:

• The wireless sensor network successfully determined CO2 concentrations, temperature, and humidity.
• Maintaining adequate IEQ levels in classrooms proved challenging, even with frequent ventilation.
• The study indicated that individual room monitoring and control are essential for balancing energy savings and good IEQ.

Conclusions:

• Novel wireless sensor networks offer a viable solution for monitoring IEQ in schools.
• Frequent ventilation alone is insufficient to guarantee adequate IEQ in classrooms.
• Implementing individual room-specific monitoring and control strategies is crucial for achieving both energy efficiency and optimal indoor environmental quality in educational settings.