Causes and Countermeasures of Increase in Energy Use for Heating/Cooling Due to House Insulation Improvement

2016 Fiscal Year Final Research Report

• Project/Area Number: 25820281
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Architectural environment/Equipment
• Research Institution: Building Research Institute (2015-2016); Osaka University (2013-2014)
• Principal Investigator: HABARA Hiromi 国立研究開発法人建築研究所, 環境研究グループ, 主任研究員 (30566047)
• Research Collaborator: YASUE Rakuto ; INO Kota
• Project Period (FY): 2013-04-01 – 2017-03-31
• Keywords: 居住者行動 / 排熱換気 / 断熱住宅 / シミュレーション / 実態調査 / 通風 / 冷房 / 自動制御

Outline of Final Research Achievements

The statistical analysis results showed that the house insulation level could contribute little to explaining the difference of window opening/air conditioner using behavior between households. The simulation results suggested that the room temperature rise and the heat load increase would occur in the highly insulated house building during the hours in sleeping and right after waking up, due to preventing the heat loss through the outer walls. By applying the cooperative control of openings and air conditioners as the countermeasure, the energy use for cooling could reduce by about 30 %, due to inducing heat discharge through windows and switching from air conditioning to natural ventilation mainly in the nighttime. Meanwhile, the capacity of air conditioners could be reduced by one class in the highly insulated house building, considering the balance of indoor environment and energy conservation.

Free Research Field

住宅の省エネルギー