This presentation by Risto Kosonen from Aalto University, funded by the European Union under the HumanIC project, examines how internal heat gains impact room air distribution and ventilation. It covers fundamental concepts like air distribution methods, ventilation effectiveness, and the interaction between convective flows and supply jets. The presentation details how buoyancy and momentum forces—measured using the Archimedes number—drive room airflow, demonstrating that high thermal loads can disrupt supply jets and alter overall circulation patterns. Additionally, it explores how thermal plumes from occupants and equipment interact with ventilation streams, concluding with a discussion on mitigating the effects of heat gains on indoor air quality and thermal comfort.
