ネットへの給水による施工段階での暑熱緩和に関する研究
仮設事務所における二酸化炭素排出削減の検討
近年，地球温暖化が大きな社会問題となっている｡建築や土木の施工段階においても，温暖化抑制を目的として，二酸化炭素の排出削減が重要となっている｡
本研究では，濡れた工事用ネットによる施工段階の暑熱緩和を目的として，工事用ネットの最上部から給水して全体を濡らした状態の蒸発冷却効果を屋外実験で確認して，建設工事現場の仮設事務所における冷房に起因する二酸化炭素排出削減について検討を行った｡
主な知見は，以下のとおりである｡
１）ネット全体が濡れた状態になると，ネット近傍の気温が約1.5℃低下した｡
２）ネット給水で仮設事務所の冷房負荷を約1割の削減が可能である｡
３）単位床面積あたり約2kg-CO2/m2の二酸化炭素の排出削減が可能である｡
| キーワード： | ネット，給水，蒸発冷却，日射遮蔽，二酸化炭素，仮設事務所 |
＊１ 技術センター 建築技術研究所 環境研究室
Research on Mitigation of Hot Climatic Environment under Construction by using Net with Capability of Water Supply for Cooling
Investigation on Reduction of Carbon Dioxide Emissions in a Temporary Field Office
In recent years, global warming has become an issue of general concern to society. An important consideration in the architecture and civil engineering fields is how to reduce carbon dioxide emissions, which contribute to global warming, from temporary works during construction.
The purpose of this study is to mitigate hot climatic conditions during construction work using the cooling capability of a net supplied with water. The author conducted outdoor measurements for the purpose of investigating the evaporative cooling effects of a net using water supply. Using these measurements, the reduction in carbon dioxide emissions that could be achieved by cooling a temporary field office were calculated. The main results of this study can be summarized as follows:
1) When the netting is kept wet in hot weather, the air temperature nearby tends to be lower by approximately 1.5 degrees Celsius.
2) The cooling load for a temporary field office can be reduced by about 10 % through the use of a net using water supply.
3) This reduction in cooling load reduces carbon dioxide emissions by about 2 kg-CO2/m2.
| Keywords: | net, water supply, evaporative cooling, solar shading, carbon dioxide, temporary field office |
*1 Environmental Engineering Research Section, Building Engineering Research Institute, Technology Center
