Development of a Simple Estimation Method of Heat Release Rate based on Classification of Common Combustibles into Category Groups

Fire Science and Technology

Tsuneto Tsuchihashi⁴  Tsutomu Nagaoka²  Toshihiko Abe³  Kazunori Harada¹  Jun Kitahori⁵  Yoshihumi Ohmiya⁵  Norichika Kakae¹  Akiko Natori⁶ 

[1] Kyoto University;Takenaka Corporation;Sanyu Civil Engineering;General Building Research Corporation of Japan;Tokyo University of Science;Non-life Insurance Rating Organization of Japan

关键词: Design fire;    Simple estimation method;    Literature survey;    Heat release rate;    Common combustible categorized group;   

DOI  :  10.3210/fst.25.31

学科分类：环境科学（综合）

来源: Tokyo University of Science * Center for Fire Science and Technology for Building

【 摘 要 】

References(21)Cited-By(2)In performance-based fire safety design of buildings, design fires are assumed based on relatively coarse information of potential combustible objects described by the object name, weight, size and constituent materials. The fire effect is calculated by using assumed design heat release rate (HRR) to judge appropriateness of fire safety provisions. For this purpose, a simple estimation method to estimate design HRR curve (full time history of HRR) was developed. The method is based on summary of available experimental datasets of various combustibles, which were categorized into groups by their names and constituent materials. As a nature of categorized groups, there are two types of variations of HRR characteristics within each category group. One type is that the object size is almost constant within each category group. For this type, HRR curves are simply averaged over the available datasets in order to obtain the characteristic design HRR curve. The method was applied to chairs and sofas. The other type is that the object size varies within each category group. To develop size-dependent HRR curves, rates of fire growth and decay were averaged over datasets in the group. Maximum HRR and total heat release (THR) were correlated with surface area and weight, respectively. The method was applied to Christmas trees. By using the proposed methods, it is possible to establish a simple formula to represent full HRR diagrams by their category names.

【 授权许可】

Unknown