オフィス空間を対象とした規準化居住域濃度に関する研究 : 各種空調システムにおける流れ場・温度場・汚染質濃度場のCFD解析(第1報)

概要

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Since contaminant in a room is not always uniformly distributed, an index for measuring ventilation efficiency in an occupied zone is required for effective ventilation design. Local ventilation efficiency is often represented by the ratio of the averaged concentration of the local domain to that of exhausted air from the room. This index is called Normalized Concentration (Cn) in an Occupied Zone. In this research, the values of Cn in an occupied zone in office space are calculated by CFD Computational Fluid Dynamics simulation technique in five different ventilation systems. Furthermore, the supply-air conditions are chosen according to the change of Archimedes number (Ar) and Reynolds number (Re) under constant heat load and also the changes in the property of the Cn are evaluated by the parameter of Ar and Re of supply-air. For most cases of ventilation systems, the Cn becomes around 1.0, but the Cn changes greatly depending on Ar and Re in the case of displacement ventilation system.
社団法人日本建築学会の論文
2002-12-30