Thermal environment and ventilation efficiency of semi-displacement ventilation system using radial impinging jet

2014 Fiscal Year Final Research Report

• Project/Area Number: 24760476
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Architectural environment/equipment
• Research Institution: Osaka City University (2013-2014); Ritsumeikan University (2012)
• Principal Investigator: KOBAYASHI Tomohiro 大阪市立大学, 工学(系)研究科(研究院), 講師 (90580952)
• Research Collaborator: SANDBERG Mats イエブレ大学居住環境センター ; KISHIMOTO Takashi きんでん ; USAMI Ryota 立命館大学 ; TOMITA Atsushi 大阪市立大学 ; SUGITA Kazuki 大阪市立大学
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 温度成層 / 衝突噴流 / 置換換気 / CFD

Outline of Final Research Achievements

In this work, Impinging Jet Ventilation (IJV) system was evaluated as it has a potential to achieve both thermal comfort and energy saving by forming vertical thermal stratification inside a room. This work involves both laboratory measurement and CFD analysis to clarify mechanics in generating thermal stratification. According to laboratory measurement, it was shown that IJV systems could appropriately mixes air in the occupied zone to obtain thermal comfort, which was impossible by Displacement Ventilation system. This work also showed analysis methodology in using CFD, i.e. appropriate turbulence model and grid layout in analyzing a room controlled by IJV system.

Free Research Field

建築環境工学・建築設備学