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Meeting ID: 691 4212 6925
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Thesis title

"Precision Ventilation in Open-Plan Offices: A Study of Variable Jet Interaction between Active Chilled Beams”

Summary of the thesis

The provision of satisfactory thermal comfort for all employees in an office setting is crucial and is typically achieved through the installation of HVAC systems. In open-plan offices, where there are more occupants and a greater range of metabolic rates due to individual differences in activity levels and body characteristics, achieving uniform thermal comfort is challenging. Traditional ventilation systems, such as mixing ventilation systems, have been used to address this issue. However, these systems are insufficient to meet the diverse thermal comfort needs of individual office occupants. To address this issue, a new ventilation strategy was developed using Active Chilled Beams (ACBs) with JetCone features to adjust airflow and create different air velocity zones in the office space.

In this thesis, the new precision ventilation strategy was tested through a series of simulations and experiments, and it was found that it provided adequate thermal comfort for office occupants with varying metabolic rates by maintaining high air velocities in zones with occupants with higher metabolic rates and low air velocities in zones with occupants with lower metabolic rates. The new ventilation strategy also achieved annual energy savings of 15% by raising the cooling setpoint temperature from 23°C to 25°C.

Copy of thesis

For a copy of the thesis, please email inst.build.phd@build.aau.dk.