温度差換気を採用する高層建物の自然換気制御効果の推定法

Abstract

As natural ventilation significantly contributes to energy savings and enhances comfort, it has been adopted in many buildings. However, to maintain a comfortable room environment, including the lower limit control for room temperature, it is necessary to control the natural ventilation rate by adjusting the opening area or opening time (referred to as opening ratio). Thus, we proposed a new airflow balance simulation tool, based on Proportional-Integral-Derivative (referred to as PID) control theory, to evaluate the performance of natural ventilation control in office buildings. The proposed tool can approximately solve the thermal and airflow balance by simply adding to the existing thermal load calculations. We focused on buoyancy driven ventilation, and analyzed the following parameters using the proposed simulation tool: change in neutral pressure level, thermal load reduction, and room environment.