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3 次元人体形状モデルの投影面積算出と人体放射解析への適用

佐藤 大樹^＊１・大黒 雅之^＊１

人体の放射熱伝達は温冷感を左右する重要な要素である。しかし，一般的な放射解析手法では，人体形状が複雑なため計算負荷が大きくなり，実建物の建築・空調計画での利用は困難であった。一方で，人体の投影面積率をデータベース化しておくことで，計算負荷を大幅に減らせる手法もあるが，データベース作成に手間がかかり，かつ，人体のすぐ近くに壁面があるような室内空間では誤差が大きくなるという問題があった。そこで本研究では，3次元人体形状モデルを用いて容易に投影面積を算出し，さらに，人体を部位分割することで投影面積率による方法が室内空間でも適用可能であることを示すことで，大規模な人体の放射熱伝達解析を可能とした。

＊１ 技術センター 建築技術研究所 環境研究室

Calculation of Projected Area Factor Based on 3D Human Body Model and Analysis of Radiative Heat Transfer on Human Body

Taiki SATO^*1 and Masayuki OGURO^*1

The radiative heat transfer on the human body surface is an important factor in thermal comfort. Conventional radiation analysis, however, requires too much computation to be used for building planning. On the other hand, there is a method for analyzing the radiative heat transfer based on the parallel projected area factor of the human body. This method requires significantly less computation than the conventional method. However, this method needs huge photographic operation to develop a database of the projected area factor, and the angle factor may not be sufficiently accurate when the distance between the body and a wall is very small. In the present work, the databases were quickly developed using a 3D model of the human body. Moreover, the authors have extended the method based on the projected area factor to the method for analyzing radiative heat within closely located walls. With these improvements, it also describes the analysis results of radiative heat transfer on segmented human body models in an office space.