Smoke and Heat Detectors Arrangement in Hallways

Jevtić, Radoje; Blagojević, Milan

doi:10.7562/se2017.7.02.04

Cited by 5 publications

(6 citation statements)

References 5 publications

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“…The distance between detectors is defined related to maximal detector`s covering area. The arrangements of smoke detectors in corridor related to different standards are presented on figure 5 [3,[5][6][7][8][9].…”

Section: Corridor Casementioning

confidence: 99%

Differences between standards related to fire protection systems design

Jevtić¹

2021

Tehnika

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Fire protection and design of fire protection systems present very important engineering tasks in protection of human lives, animals and material properties. Because of its great significance, everything in fire protection and fire protection systems design must be defined by appropriate standards. There are several different standards in use in different countries around the world. Very often, in solvation of different fire protection tasks, there are many questions asked which standard should be used. There are many similarities between standards, but there are also many differences between standards. Also, some standards don't define at all some cases that can be found in fire protection. This paper was written to present solutions for some particular tasks by some valid standards (EN 54, BS, NPB 88-2001, VDE 088-2 and NFPA 72) in fire protection and differences between them in the same cases.

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Section: Corridor Casementioning

confidence: 99%

Differences between standards related to fire protection systems design

Jevtić¹

2021

Tehnika

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“…To mitigate this effect, the authors propose increasing the number of fire detectors but there is no justification for the number of such fire detectors. In addition, study [5] notes that this approach is not effective and leads to an increase in financial costs. In [6], attention is paid to that the time of fire detector triggering is determined both by the nature and parameters of the input impact and by the properties of the fire detector.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

“…J 0 (µ), J 1 (µ) are the Bessel functions of the first kind of zero and first orders, respectively; H is the Hankel cumulative transformation operator. After two-time integration for parts of the additive component in (5), taking into account the differential Bessel equation with respect to the function J 0 (µ n r/R), as well as boundary conditions (2), the differential equation ( 5) will be transformed to the form ( ) ( )…”

Section: The Mathematical Description Of Thermal Processes In the Thermoresistive Sensing Element Of A Fire Detectormentioning

confidence: 99%

Substantiating the pulse method for determining the time parameter of fire detectors with a thermoresistive sensing element

Abramov

Basmanov

Kozak

2021

EEJET

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This paper substantiates the pulse method for determining the time parameter for fire detectors with a thermoresistive sensing element ‒ the time constant. The method is based on using the Joule-Lenz effect, which manifests itself when an electric current pulse passes through the thermoresistive sensing element of fire detectors. Thermal processes in such a sensing element are described by a mathematical model that belongs to the class of equations of mathematical physics. The solution to the differential equation of this class was derived using the Hankel integral transformation and is represented as a series relative to the Bessel functions. The resulting solution is used to construct a mathematical model of a thermoresistive sensing element in the form of a transfer function, which takes the form of the transfer function of the inertial link. To trigger the thermoresistive sensing element of fire detectors, a single pulse of electric current in the shape of a rectangular triangle is used. The integral Laplace transformation was applied to mathematically describe the response of a thermoresistive sensing element to the thermal effect of such a test influence. To obtain information about the time parameter of fire detectors with a thermoresistive sensing element, the ratio of its output signals is used, which are measured in the a priori defined moments. A two-parametric expression was built to determine the time parameter of fire detectors; a verbal interpretation of the pulse method to determine it was provided. The implementation of this method ensures the invariance of the time parameter of fire detectors with a thermoresistive sensing element relative to the amplitude of a single pulse of an electric current, as well as relative to the parameter that is included in its transfer coefficient.

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“…The walls were made from concrete with a thickness of 0.2 m. Inside the building, there were 25 cupboards of different dimensions (width and height) made of oak wood and pinewood. There were also 8 desks and 4 chairs made of plywood and metal located in the rooms [26,27].…”

Section: Fire Simulation Modelsmentioning

confidence: 99%

Simulation of Fire as a Form of Safety and Protection of Human Lives and Material Assets

Jevtić

2020

FU Work Liv Env Prot

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Fire is one of the most dangerous occurrences in human history. Many lives have been lost in fires. Apart from human lives, a fire can destroy everything on its way-animals, vegetation, assets. Fire protection is as old as fire occurrence. The task of fire protection is to mitigate the effects of fires. The best way is, undoubtedly, fire prevention, but, if a fire occurs, fire fighting must be carried out quickly and effectively in order to save endangered humans and material properties. One of the most effective, safest and cheapest ways of fire protection is the usage of simulation software. This paper has been written to demonstrate the reasons and the advantages of simulation software usage in prediction of fire situations, fire development, fire spread all with the aim to protect human lives, animals, vegetation and material property.

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Smoke and Heat Detectors Arrangement in Hallways

Cited by 5 publications

References 5 publications

Differences between standards related to fire protection systems design

Differences between standards related to fire protection systems design

Substantiating the pulse method for determining the time parameter of fire detectors with a thermoresistive sensing element

Simulation of Fire as a Form of Safety and Protection of Human Lives and Material Assets

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