期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2019
卷号：295
期号：4
页码：1-5
DOI：10.1088/1755-1315/295/4/042035
出版社：IOP Publishing
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.
