STUDIES OF THE THERMAL EFFECT OF A FIRE TORCH IN A WINDOW OPENING OF A BUILDING ON ELEMENTS OF ADJACENT OBJECTS

  • V Nizhnyk The Ukrainian Civil Protection Research Institute
Keywords: building, distance, fire torch, fire prevention, temperature, thermal effect, heat transfer.

Abstract

The results of experimental determination of temperature change on the elements of adjacent objects from the thermal influence of thefire torch through the window opening of the building are given. The processing of the received experimental data by statistical parameters (absolute, relative and root-mean-square deviations, dispersions, and also Grabbs and Fisher criteria) was carried out. The experimental data obtained show that the temperature of the sample surface increases monotonically over the 30 minute thermal radiation source through the window opening and reaches the maximum values of 161 ° C, 94 ° C and 55 ° C, respectively, for distances from the combustion center of 2 m , 4 m and 6.8 m According to the results of the evaluation of experimental data for the presence of emissions and quasi-emissions, according to the Grabbs criterion, it has been established that the experimental data for the studied samples 1 (Fig. 3) and 2 do not contain emissions and quasi-emissions, and for sample 3 contain emissions and quasi-emissions. Experimental data, which are emissions or quasi-emissions based on the Grabbs criterion, were not taken into account during further processing of the results. An estimate of the data obtained for the absolute deviation of each experiment from the averaged values and established, the deviation does not exceed 5.8 ° C, which is 10.4% in the percentage and the maximum average deviation is 5.6 ° C, indicating satisfactory convergence of experimental data received In the assessment of the membership of temperature dispersions to one general population, Fisher's criterion found that the calculated value of Fisher's criterion does not exceed the table value. The temperature dependence on the facade of the building is constructed from the distance of such a building from the combustion center and the duration of the thermal effect.

Published
2019-10-04