Energy savings design method based on appropriate arrangement of building elements and equipments

2015 Fiscal Year Final Research Report

• Project/Area Number: 25630238
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Architectural environment/Equipment
• Research Institution: Osaka University
• Principal Investigator: Kotani Hisashi 大阪大学, 工学(系)研究科(研究院), 准教授 (20243173)
• Co-Investigator(Kenkyū-buntansha): SAGARA Kazunobu 大阪大学, 大学院工学研究科, 教授 (30109285) ; MOMOI Yoshihisa 大阪大学, 大学院工学研究科, 助教 (40506870)
• Research Collaborator: YAMANAKA Toshio 大阪大学, 教授 ; YAMADA Shin-ichi 大阪大学, 大学院生 ; FUJIWARA Risa 大阪大学, 大学院生 ; SUGAHARA Akiko 大阪大学, 学部生 ; NISHIMURA Koichi 大阪ガス株式会社, エネルギー技術研究所
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 屋上 / ショートサーキット / 渦スケール / PIV / CFD

Outline of Final Research Achievements

So called ‘short circuit problem’ of the air-conditioning unit located at a building rooftop was studied because it is the important problem from the energy savings points of vies. This study might be a foundation of the energy savings design method of the rooftop. Influences of a penthouse and blind walls as building elements on this short circuit phenomenon was investigated by means of wind tunnel experiments and the computational fluid dynamics (CFD). The high spatial and time resolution measurements of the air velocity around the building rooftop were conducted as well. The dominant scales of the eddy inside the separated flow at the building rooftop were analyzed by the spectrum analysis because the characteristics of the separation flow has to revealed from a viewpoint of a general-purpose wind environmental research.

Free Research Field

工学、建築環境・設備