March 6 - 8, 2017 | Berlin
LEADING ENGINEERING SIMULATION CONFERENCE
This work is part of the MinMax-Ventilation project, which is government-founded by the Federal Ministry for Economic Affairs and Energy (BMWi). The project goal is a reduction of ventilation energy demand (minimized energy demand) while maintaining high thermal comfort and air quality for partly occupied venues (maximized ventilation effectiveness).
State of the art for ventilation systems in venues are underfloor air distribution systems. Based on displacement ventilation principles the fresh air supply is under the seats of the audience. The room’s supply air flow is controlled globally to provide sufficient air exchange in all room sections, occupied or unoccupied. Energy savings can be achieved by a locally controlled air distribution system, the so called MinMax-Ventilation, supplying fresh air to occupied zones only.
In this study the focus is a numerical approach to find an improved air pass setup. The investigated lecture hall at the Hermann-Rietschel-Institute e.g. could be equipped with one volume flow controller per seat – in total 120 volume flow controllers – to achieve accurate controllability. Each controller can be set open or closed, that means there are 120 to the power of 120 possibilities. Thus intelligent design optimization algorithm like the used SHERPA is necessary. First results show that with an improved setup the used amount of air could be reduced up to 50% without losing any comfort at occupied seats. A collection of optimized setups in an offline data stock would be a milestone for a successful engineered air pass regulation system.