Experimental study of a semi-passive ventilation grille with a feedback control system

Area of Science:

• Building Science
• Environmental Engineering
• HVAC Systems

Background:

• Modern energy-saving regulations promote low air permeability window frames, often worsening indoor microclimate and air quality.
• Air-tight window frames can lead to uncontrolled and excessively high air change rates.
• Mechanical ventilation is not always practical due to cost and energy waste.

Purpose of the Study:

• To propose and experimentally investigate a semi-passive damper with a feedback control system for controlled indoor air changes.
• To evaluate the effectiveness of the proposed semi-passive grille compared to existing passive ventilation solutions.
• To explore its applicability in both natural and mechanical ventilation systems.

Main Methods:

• Experimental study of a proposed semi-passive damper with a feedback control system.
• Investigation of airflow control under natural and artificial pressure gradients.
• Comparative analysis with existing passive ventilation grilles.

Main Results:

• The semi-passive grille effectively controls airflow injected into a room via pressure gradients.
• It offers more effective airflow control than standard passive ventilation grilles.
• The one-way flow characteristic requires a more complex configuration for natural ventilation but is suitable for mechanical systems.

Conclusions:

• Semi-passive ventilation devices with feedback control offer a viable solution for managing indoor air quality and ventilation rates.
• The proposed damper provides superior airflow control compared to passive grilles.
• Its widespread use is promising in mechanical ventilation systems requiring accurate airflow management.