All types of buildings should prioritize the HVAC system‘s and other building services’ functionality, but theaters and other areas with high population density should focus on these aspects even more. One of Iasi’s most significant and prominent goals is the “Vasile Alecsandri” National Theatre, which was restored and consolidated in 2012. It is one of the city’s most emblematic historical landmarks. Based on the reference paper “ Numerical simulation of HVAC system functionality in a sociocultural building”, HVAC system in a sociocultural building is investigated.

Figure 1: Vasile Alecsandri sociocultural building

Simulation Process

The real HVAC system serves as the model’s basis. The mesh is realized using ANSYS-Meshing, while the 2D geometry is developed using ANSYS-Design Modeler with small control volumes and improvements near the walls and near crucial locations. This results in a qualified structured grid. The air is assumed as a mixture of oxygen, nitrogen and water vapor, requiring the use of Species Transport model. According to references, a sitting person produces around 70 g H20/h. Applying heat generation rate under the circumstance of full occupancy, a constant source of energy of 100 W/m3 was imposed.

Figure 2: 2D schematic of sociocultural building model

Post-processing

The temperature ranges from 20 to 23 degrees Celsius in the main areas—stall, lodge, and balcony, respectively—where spectators are gathered. The contours of velocities illustrate the primary fresh air circulation zones. The occupied zones are receiving adequate ventilation from the inlet zones. Because of 2D oversimplified assumptions about the ventilation airflow, the average velocities are roughly 0.2 m/s, and the peak values are recorded at the outlet and inlet zones.