Pub Date : 2019-10-01DOI: 10.1109/ICFSFPE48751.2019.9055760
Pengfei Wang, Xuanya Liu, Longfei Chen
In this work, the flame displacement data along horizontal direction in small-scale fire whirl due to flame wander was extracted by the method of video image analysis, by which the appearance probability of flame center along horizontal direction and frequency of flame wander were calculated, respectively. Linear correlation between frequency data and flame circulation is still achieved in this work, and is compared with that obtained by particle image velocimetry (PIV) method in small-scale fire whirl and that obtained by video image analysis in medium-scale fire whirl in the previous work. The comparisons show that the linear correlation between the frequency of flame wander and flame circulation is independent of flame size, but the linear coefficient of the correlation is related to the flame size. And from the comparison, it can be also found that under the case of the same flame circulation, the frequency of flame wander in small-scale fire whirl is faster than that in medium-scale fire whirl.
{"title":"Experimental Study on Flame Wander of Small-scale Fire Whirl based on Video Image Analysis","authors":"Pengfei Wang, Xuanya Liu, Longfei Chen","doi":"10.1109/ICFSFPE48751.2019.9055760","DOIUrl":"https://doi.org/10.1109/ICFSFPE48751.2019.9055760","url":null,"abstract":"In this work, the flame displacement data along horizontal direction in small-scale fire whirl due to flame wander was extracted by the method of video image analysis, by which the appearance probability of flame center along horizontal direction and frequency of flame wander were calculated, respectively. Linear correlation between frequency data and flame circulation is still achieved in this work, and is compared with that obtained by particle image velocimetry (PIV) method in small-scale fire whirl and that obtained by video image analysis in medium-scale fire whirl in the previous work. The comparisons show that the linear correlation between the frequency of flame wander and flame circulation is independent of flame size, but the linear coefficient of the correlation is related to the flame size. And from the comparison, it can be also found that under the case of the same flame circulation, the frequency of flame wander in small-scale fire whirl is faster than that in medium-scale fire whirl.","PeriodicalId":6687,"journal":{"name":"2019 9th International Conference on Fire Science and Fire Protection Engineering (ICFSFPE)","volume":"40 3 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80847400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-10-01DOI: 10.1109/ICFSFPE48751.2019.9055844
Jie Wang, Yinqiu Wei, Xuepeng Jiang, Hongjie Zhang, K. Lu
The vertical shaft which can discharge fire smoke through the driving force of stack effect, is an effective natural smoke extraction method to control tunnel fire smoke and extend the available personnel evacuation time. Its natural smoke extraction efficiency would be affected by many factors such as the shaft structure. In order to search the optimum shaft structure, a series of tunnel fires with five kinds of shafts (the common shaft, 45 degree angle shaft, shaft groups, shaft with rectangular hood and board-coupled shaft (BCS)) are simulated by Fire Dynamic Simulator (FDS). Results show that the optimization design of the shaft structure, to a certain extent, can improve the smoke extraction efficiency, which are BCS shaft, shaft groups, 45 degree angle shaft, shaft with rectangular hood and common shaft respectively from large to small. There into, the smoke extraction efficiency of the BCS shaft can reach 70% due to the diversion and deflection of the smoke flow by BCS baffle, while the smoke extraction efficiency of ordinary shaft is 49%. Next the smoke extraction efficiency of shaft group can reach 57%, which makes the suction and penetration less likely to occur and directs the flow of fire smoke.
{"title":"Influence of the Shaft Structure on Natural Smoke Extraction Efficiency in Tunnel Fires","authors":"Jie Wang, Yinqiu Wei, Xuepeng Jiang, Hongjie Zhang, K. Lu","doi":"10.1109/ICFSFPE48751.2019.9055844","DOIUrl":"https://doi.org/10.1109/ICFSFPE48751.2019.9055844","url":null,"abstract":"The vertical shaft which can discharge fire smoke through the driving force of stack effect, is an effective natural smoke extraction method to control tunnel fire smoke and extend the available personnel evacuation time. Its natural smoke extraction efficiency would be affected by many factors such as the shaft structure. In order to search the optimum shaft structure, a series of tunnel fires with five kinds of shafts (the common shaft, 45 degree angle shaft, shaft groups, shaft with rectangular hood and board-coupled shaft (BCS)) are simulated by Fire Dynamic Simulator (FDS). Results show that the optimization design of the shaft structure, to a certain extent, can improve the smoke extraction efficiency, which are BCS shaft, shaft groups, 45 degree angle shaft, shaft with rectangular hood and common shaft respectively from large to small. There into, the smoke extraction efficiency of the BCS shaft can reach 70% due to the diversion and deflection of the smoke flow by BCS baffle, while the smoke extraction efficiency of ordinary shaft is 49%. Next the smoke extraction efficiency of shaft group can reach 57%, which makes the suction and penetration less likely to occur and directs the flow of fire smoke.","PeriodicalId":6687,"journal":{"name":"2019 9th International Conference on Fire Science and Fire Protection Engineering (ICFSFPE)","volume":"18 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81804283","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-10-01DOI: 10.1109/ICFSFPE48751.2019.9055771
Y. Chen, Long Chen, Yuzhuo Wang, Wen-ting Bao, Z. Huang
Oil burner has been widely applied for the aircraft cabin material and power plant fire testing. Currently new technology Sonic burner has been developed and approved for use in interior and fuselage testing. In order to make better understanding of the new Sonic burner, this paper researched the effect of air, including the inlet airflow pressure, inlet airflow temperature and ambient airflow velocity, on the output flame temperature distribution. Both vertical and horizontal mounting of burner were researched. The results revealed that there was a linear relationship between inlet airflow pressure and flame temperature, and inlet airflow temperature showed no significant effect on flame temperature. The increase of ambient airflow velocity, at different angels, was proven to have a negative effect on flame temperature. (Abstract)
{"title":"The Air Influence Study on Flame Characteristics of the Sonic Oil Burner Used for Aviation Fire Test","authors":"Y. Chen, Long Chen, Yuzhuo Wang, Wen-ting Bao, Z. Huang","doi":"10.1109/ICFSFPE48751.2019.9055771","DOIUrl":"https://doi.org/10.1109/ICFSFPE48751.2019.9055771","url":null,"abstract":"Oil burner has been widely applied for the aircraft cabin material and power plant fire testing. Currently new technology Sonic burner has been developed and approved for use in interior and fuselage testing. In order to make better understanding of the new Sonic burner, this paper researched the effect of air, including the inlet airflow pressure, inlet airflow temperature and ambient airflow velocity, on the output flame temperature distribution. Both vertical and horizontal mounting of burner were researched. The results revealed that there was a linear relationship between inlet airflow pressure and flame temperature, and inlet airflow temperature showed no significant effect on flame temperature. The increase of ambient airflow velocity, at different angels, was proven to have a negative effect on flame temperature. (Abstract)","PeriodicalId":6687,"journal":{"name":"2019 9th International Conference on Fire Science and Fire Protection Engineering (ICFSFPE)","volume":"14 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84579329","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-10-01DOI: 10.1109/ICFSFPE48751.2019.9055879
Shaogang Zhang, Yuedong Han, Xianbin Li, Kun He, Min Peng, Jinhui Wang
Equivalent fire heat release rate of double fires under different separating distances is proposed based on the theoretical analysis of smoke back-layering. Through a series of numerical simulations, the characteristics of equivalent fire heat release rate of double fires are investigated, and the results show that the curvy of equivalent fire heat release rate of double fires presents a “stair” shape with the increase of separating distance, which can be divided into three regions, namely the stable region, quickly decrease region and fluctuation region. Based on the equivalent fire heat release rate, a new model to predict the smoke back-layering length of double fires under different separating distances is developed. The model of equivalent fire heat release rate is verified by the experimental results.
{"title":"Equivalent Fire Heat Release Rate of Double Fires with Different Separating Distances in the Longitudinal Ventilated Road Tunnel","authors":"Shaogang Zhang, Yuedong Han, Xianbin Li, Kun He, Min Peng, Jinhui Wang","doi":"10.1109/ICFSFPE48751.2019.9055879","DOIUrl":"https://doi.org/10.1109/ICFSFPE48751.2019.9055879","url":null,"abstract":"Equivalent fire heat release rate of double fires under different separating distances is proposed based on the theoretical analysis of smoke back-layering. Through a series of numerical simulations, the characteristics of equivalent fire heat release rate of double fires are investigated, and the results show that the curvy of equivalent fire heat release rate of double fires presents a “stair” shape with the increase of separating distance, which can be divided into three regions, namely the stable region, quickly decrease region and fluctuation region. Based on the equivalent fire heat release rate, a new model to predict the smoke back-layering length of double fires under different separating distances is developed. The model of equivalent fire heat release rate is verified by the experimental results.","PeriodicalId":6687,"journal":{"name":"2019 9th International Conference on Fire Science and Fire Protection Engineering (ICFSFPE)","volume":"216 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79639111","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-10-01DOI: 10.1109/ICFSFPE48751.2019.9055883
C. Dong, Chun Guo, Kun Yang
Based on the evacuation path network in the TOD, the evacuation route allocation model and the evacuation pedestrian dynamic transmission model, the TOD personnel evacuation simulation is realized, and the software demonstration application is combined with the case to obtain the evacuation demand distribution status and evacuation under the emergency evacuation condition of the TOD internal personnel. Pedestrian flow dynamic transmission process and evacuation time provide support for a customized evacuation plan, improve evacuation efficiency. Through the simulation of the case, the evacuation of TOD is divided into four stages, and its congestion characteristics are quite different from those of the general building group. This paper puts forward practical suggestions for TOD evacuation based on the simulation results.
{"title":"TOD Evacuation Simulation Model and Implementation","authors":"C. Dong, Chun Guo, Kun Yang","doi":"10.1109/ICFSFPE48751.2019.9055883","DOIUrl":"https://doi.org/10.1109/ICFSFPE48751.2019.9055883","url":null,"abstract":"Based on the evacuation path network in the TOD, the evacuation route allocation model and the evacuation pedestrian dynamic transmission model, the TOD personnel evacuation simulation is realized, and the software demonstration application is combined with the case to obtain the evacuation demand distribution status and evacuation under the emergency evacuation condition of the TOD internal personnel. Pedestrian flow dynamic transmission process and evacuation time provide support for a customized evacuation plan, improve evacuation efficiency. Through the simulation of the case, the evacuation of TOD is divided into four stages, and its congestion characteristics are quite different from those of the general building group. This paper puts forward practical suggestions for TOD evacuation based on the simulation results.","PeriodicalId":6687,"journal":{"name":"2019 9th International Conference on Fire Science and Fire Protection Engineering (ICFSFPE)","volume":"8 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79613020","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-10-01DOI: 10.1109/ICFSFPE48751.2019.9055820
Chubei Chao, Wei Li
Pressure losses have great impact on firefighting operation of fire engines. The pipeline model in AMESim is built according to compressed air foam fire truck AP80; the fluid medium is simulated by setting different fluid parameters; the centrifugal pump is replaced by a constant current source; the length and diameter of the pipeline refer to the actual parameters of AP80; and the pneumatic valve in the pipeline is simulated by a solenoid valve model. Because of the low water pressure, the fluid is considered as incompressible fluid, the pressure of the constant current source is considered as the overall pressure loss of the pipeline as well. By simulating different working conditions, the pressure loss and flow rate under different working conditions are putting forward. It plays an active role in improving the firefighting capability, and is of great significance to the future study of pressure loss about fire engine.
{"title":"Simulation and Analysis of Pressure Loss and Flow Rate of Fire Engines","authors":"Chubei Chao, Wei Li","doi":"10.1109/ICFSFPE48751.2019.9055820","DOIUrl":"https://doi.org/10.1109/ICFSFPE48751.2019.9055820","url":null,"abstract":"Pressure losses have great impact on firefighting operation of fire engines. The pipeline model in AMESim is built according to compressed air foam fire truck AP80; the fluid medium is simulated by setting different fluid parameters; the centrifugal pump is replaced by a constant current source; the length and diameter of the pipeline refer to the actual parameters of AP80; and the pneumatic valve in the pipeline is simulated by a solenoid valve model. Because of the low water pressure, the fluid is considered as incompressible fluid, the pressure of the constant current source is considered as the overall pressure loss of the pipeline as well. By simulating different working conditions, the pressure loss and flow rate under different working conditions are putting forward. It plays an active role in improving the firefighting capability, and is of great significance to the future study of pressure loss about fire engine.","PeriodicalId":6687,"journal":{"name":"2019 9th International Conference on Fire Science and Fire Protection Engineering (ICFSFPE)","volume":"8 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87441192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-10-01DOI: 10.1109/ICFSFPE48751.2019.9055758
Yue Xiang, H. Zou, Caixia An, Yinuo Qian
To study the evacuation characteristics of laboratory personnel in university, the evacuation experiments were conducted under different layouts and scenes, that cross-combine three layouts forms and five scenes were carried out. Behavioral results were collected through several field experiments aimed at the door opening time, the personnel evacuation time with different layouts and evacuation ability. The results show that the evacuation ability of the evacuation door (0.9m wide) is about 120 persons/min when the evacuation door come into congestion, and the average of door opening time was 4 seconds. Meanwhile, a reasonable laboratory layout can reduce the evacuation time.
{"title":"Study on Evacuation Characteristics of Laboratory Personnel in University","authors":"Yue Xiang, H. Zou, Caixia An, Yinuo Qian","doi":"10.1109/ICFSFPE48751.2019.9055758","DOIUrl":"https://doi.org/10.1109/ICFSFPE48751.2019.9055758","url":null,"abstract":"To study the evacuation characteristics of laboratory personnel in university, the evacuation experiments were conducted under different layouts and scenes, that cross-combine three layouts forms and five scenes were carried out. Behavioral results were collected through several field experiments aimed at the door opening time, the personnel evacuation time with different layouts and evacuation ability. The results show that the evacuation ability of the evacuation door (0.9m wide) is about 120 persons/min when the evacuation door come into congestion, and the average of door opening time was 4 seconds. Meanwhile, a reasonable laboratory layout can reduce the evacuation time.","PeriodicalId":6687,"journal":{"name":"2019 9th International Conference on Fire Science and Fire Protection Engineering (ICFSFPE)","volume":"11 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87404863","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ship listing and motion affects individual movement pattern on board, thus individual walking behavior would be significantly different from those on level ground. To quantify the correlation between individual walking speed and gait parameters of individuals on board, we designed a ship corridor simulator, where we performed both fast and freely walking experiments considering the effect of ship heeling and trim. Results indicated that both step length and step frequency are positively linearly associated with individual walking speed with different degrees, with one exception that individuals could adopt quick and tiny steps in a much lower walking speed with even larger step frequency to keep balance when the trim-up or trim-down angle exceeds 20°. However, there is no direct relationship that could be observed between step width and individual walking speed, despite that walking with wider steps might weaken individual stability and increase fall risk. Moreover, though individual experimental subjects tend to walk along the right side due to cultural factors, the walking routes are more likely to be close to the handrail arranged on the opposite side for safety purpose when the trim-down angle exceeds 20° even though some of them did not use the handrail actually. This work would be a primary consideration in the development of evacuation models and the design of evacuation facilities on board.
{"title":"An Experimental Study on Spatiotemporal Step Characteristics of Individuals Considering the Effect of Ship Heeling and Trim","authors":"Jinlu Sun, Shouxiang Lu, Jiansheng Wu, Ting Sun, Kai Shi, Shenshi Huang","doi":"10.1109/ICFSFPE48751.2019.9055831","DOIUrl":"https://doi.org/10.1109/ICFSFPE48751.2019.9055831","url":null,"abstract":"Ship listing and motion affects individual movement pattern on board, thus individual walking behavior would be significantly different from those on level ground. To quantify the correlation between individual walking speed and gait parameters of individuals on board, we designed a ship corridor simulator, where we performed both fast and freely walking experiments considering the effect of ship heeling and trim. Results indicated that both step length and step frequency are positively linearly associated with individual walking speed with different degrees, with one exception that individuals could adopt quick and tiny steps in a much lower walking speed with even larger step frequency to keep balance when the trim-up or trim-down angle exceeds 20°. However, there is no direct relationship that could be observed between step width and individual walking speed, despite that walking with wider steps might weaken individual stability and increase fall risk. Moreover, though individual experimental subjects tend to walk along the right side due to cultural factors, the walking routes are more likely to be close to the handrail arranged on the opposite side for safety purpose when the trim-down angle exceeds 20° even though some of them did not use the handrail actually. This work would be a primary consideration in the development of evacuation models and the design of evacuation facilities on board.","PeriodicalId":6687,"journal":{"name":"2019 9th International Conference on Fire Science and Fire Protection Engineering (ICFSFPE)","volume":"20 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83304463","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this paper, a real-sized fire test platform for home kitchen is built, and oil pan fire, kitchen flue fire and cabinet fire tests are carried out on this platform. The evolution characteristics of different fire accidents in home kitchen are studied through the change and development of temperature, smoke and fire situation. The following conclusions are drawn from the experiment: the time of igniting 0.5L, 1.0L and 2.5L cooking oil by using gas stove fire is 200, 480 and 742s, respectively; when the range hood is open, the range hood can be ignited by the cooking oil fire above 1.0L, thus causing range hood fire. It is very difficult to extinguish cooking oil fire and kitchen flue fire with dry powder fire extinguisher, and it is very easy to re-ignite. Water-based fire extinguisher specially used for cooking oil fire is needed. Kitchen flue fire can ignite all combustibles in kitchen within 3 minutes, and reaching the state of flashover. The results of this study can provide reference for kitchen fire prevention, detection, disposal and other technologies.
{"title":"Experimental Study on Kitchen Fire Accidents in Different Scenarios *","authors":"Xiao-ying Xu, Pengfei Wang, Nian-hao Yu, Hong-ya Zhu","doi":"10.1109/ICFSFPE48751.2019.9055764","DOIUrl":"https://doi.org/10.1109/ICFSFPE48751.2019.9055764","url":null,"abstract":"In this paper, a real-sized fire test platform for home kitchen is built, and oil pan fire, kitchen flue fire and cabinet fire tests are carried out on this platform. The evolution characteristics of different fire accidents in home kitchen are studied through the change and development of temperature, smoke and fire situation. The following conclusions are drawn from the experiment: the time of igniting 0.5L, 1.0L and 2.5L cooking oil by using gas stove fire is 200, 480 and 742s, respectively; when the range hood is open, the range hood can be ignited by the cooking oil fire above 1.0L, thus causing range hood fire. It is very difficult to extinguish cooking oil fire and kitchen flue fire with dry powder fire extinguisher, and it is very easy to re-ignite. Water-based fire extinguisher specially used for cooking oil fire is needed. Kitchen flue fire can ignite all combustibles in kitchen within 3 minutes, and reaching the state of flashover. The results of this study can provide reference for kitchen fire prevention, detection, disposal and other technologies.","PeriodicalId":6687,"journal":{"name":"2019 9th International Conference on Fire Science and Fire Protection Engineering (ICFSFPE)","volume":"27 2 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89914833","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-10-01DOI: 10.1109/ICFSFPE48751.2019.9055874
Teng Xue, Xiaodan Zhang, Jing Jin, Jin-zhuan Zhang, Chengyao Li, Qiang Fu
The flowers, leaves and stems of artificial green plants have been chosen as the study objects and the pyrolysis characteristics of these three parts have been analyzed in order to identify the fire characteristics of the typical thermoplastic artificial green plants. The pyrolysis activation energy distribution of the three parts of the sample has been studied through Starink method and Firedman method respectively and the accuracy of the two methods have been compared. The most probable mechanism functions of the primary pyrolysis stages of the three parts have been discussed through Malek method. The Coats-Redfern method has been used to verify the obtained most probable mechanism functions. The results of thermogravimetric experiments show that the pyrolysis of the flowers and leaves of the artificial green plants can be divided into two stages. The temperature at which these two parts reach the maximum heating rate is basically the same. The residual amount of the flower sample keeps decreasing with the increase of the heating rate while the residual amount of the leaves increases with the increasing heating rate. The pyrolysis of stems involves three stages, in which the second stage owns the highest mass loss rate, and the residual amount of stems decreases with the rising heating rate. The analysis results of the pyrolysis kinetics of artificial green plants show that the activation energy of stems is relatively low, most likely to be pyrolyzed in case of fire. The partial activation energy of the leaves is relatively high, contributing to high thermal stability in case of fire. As the reaction proceeds, the pyrolysis mechanisms of the artificial green plant flowers, leaves and stems transform from random nucleation to two-dimensional diffusion, from random nucleation to phase boundary reaction and from chemical reaction to three-dimensional diffusion respectively.
{"title":"The Pyrolysis Characteristics and Kinetics Analysis on Typical Thermoplastic Artificial Green Plants","authors":"Teng Xue, Xiaodan Zhang, Jing Jin, Jin-zhuan Zhang, Chengyao Li, Qiang Fu","doi":"10.1109/ICFSFPE48751.2019.9055874","DOIUrl":"https://doi.org/10.1109/ICFSFPE48751.2019.9055874","url":null,"abstract":"The flowers, leaves and stems of artificial green plants have been chosen as the study objects and the pyrolysis characteristics of these three parts have been analyzed in order to identify the fire characteristics of the typical thermoplastic artificial green plants. The pyrolysis activation energy distribution of the three parts of the sample has been studied through Starink method and Firedman method respectively and the accuracy of the two methods have been compared. The most probable mechanism functions of the primary pyrolysis stages of the three parts have been discussed through Malek method. The Coats-Redfern method has been used to verify the obtained most probable mechanism functions. The results of thermogravimetric experiments show that the pyrolysis of the flowers and leaves of the artificial green plants can be divided into two stages. The temperature at which these two parts reach the maximum heating rate is basically the same. The residual amount of the flower sample keeps decreasing with the increase of the heating rate while the residual amount of the leaves increases with the increasing heating rate. The pyrolysis of stems involves three stages, in which the second stage owns the highest mass loss rate, and the residual amount of stems decreases with the rising heating rate. The analysis results of the pyrolysis kinetics of artificial green plants show that the activation energy of stems is relatively low, most likely to be pyrolyzed in case of fire. The partial activation energy of the leaves is relatively high, contributing to high thermal stability in case of fire. As the reaction proceeds, the pyrolysis mechanisms of the artificial green plant flowers, leaves and stems transform from random nucleation to two-dimensional diffusion, from random nucleation to phase boundary reaction and from chemical reaction to three-dimensional diffusion respectively.","PeriodicalId":6687,"journal":{"name":"2019 9th International Conference on Fire Science and Fire Protection Engineering (ICFSFPE)","volume":"29 1","pages":"1-8"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87213841","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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