Determination of the main parameters of the heated disk segment a thermosensitive element of a special construction products for fire detection
Quite often, fires move from one object to another. The main number of such fires damages or destroys buildings of the V degree of fire resistance. This is indicated in the fire statistics. Buildings of the V degree of fire resistance are built mainly using wood. An analysis of the literature indicates the presence of a significant number of solutions to ensure the fire safety of such houses. Basically, these solutions are aimed at fire protection. At the same time, there is no provision for the use of active protective equipment to detect a fire remotely. However, the use of these means is allowed when placing the receiving surface of the thermosensitive element of the specified means and the radiating surface in a certain way. These surfaces are not perpendicular. The purpose of the study is to establish the main parameters of the heated disk segment of the thermosensitive element. This disk is located inside a special construction product for detecting fire at nearby objects. The authors conducted bench tests to obtain empirical data. With the help of these data and taking into account the positions of planimetry and trigonometry, the equations were obtained. These equations describe the dependence of the heated surface area of the disk and its temperature on the central angle of this disk. The first equation characterizes the dependence of the area of the heated disk segment of the thermosensitive element of a special construction product on the value of the central angle of the disk. The second equation allows us to describe the dependence of the temperature of the heated segments of the disk of a thermosensitive element of a special construction product under given conditions on the value of the central angle of the disk. It is proposed to use these equations to estimate the intensity of thermal radiation at different angles of exposure during a fire. They allow you to determine the basic parameters of the disks of thermosensitive elements. These parameters are necessary for the manufacture of these disks, determining their installation locations and orientation to a potentially fire-threatening object.