The optimal design of fire fighting suits

2019 5th International Conference on Energy Materials and Environment Engineering

能源学;生态环境科学

Huang, Yiping^1

Renewable Energy School, North China Electric Power University, Beijing, China^1

关键词: Constant temperature;    Different thickness;    Functional expression;    Internal heat source;    Optimal thickness;    Temperature limits;    Temperature values;    Unsteady heat transfer;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/295/4/042035/pdf
DOI  :  10.1088/1755-1315/295/4/042035

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Fire fighting suits are very important for fire rescue workers. However, at present, the design is not optimal. In this paper, we design an optimal fire fighting suits, considering the temperature distribution of a dummy with a constant temperature. Because the dummy has a constant temperature, it cannot simulate human metabolism, which means the design process should be an unsteady heat transfer process with an internal heat source. Hence, we have made a reasonable simplification of the process. According to the principle of heat balance, since the temperature is dynamic, a recursive relation about the temperature is established, and the optimal thickness of layer II is 15mm through simulation. By integrating the recursive formula, the functional expression of temperature with respect to time, layer II thickness and layer IV thickness can be obtained under certain approximation. Since the outside temperature of the dummy is constantly rising, it is only necessary to ask the temperature value of the 25th minute and the 30th minute for each thickness condition to reach the desired temperature limit. Therefore, different thickness values are circulated discretely to establish the optimal function of thickness, and the thickness of layer II is 2mm and that of layer IV is 4mm.