No. 1 (Vol. 3) 2020
MODELING THE HEAT TRANSFER IN CABLE PENETRATIONS AT THE DETERMINATION OF FIRE RESISTANCE LIMITS
Irek R. Khasanov – Doctor of Technical Sciences, Main Researcher; Andrey A. Varlamkin – Head of Sector (FGBU VNIIPO EMERCOM of Russia)
A mathematical model of heat transfer in cable penetration at the thermal fire influence is proposed. This model allows to study the processes of heat distribution between the elements of cable products and cable penetration construction. A software package based on the finite element method was used for numerical implementation of the proposed mathematical model. To study the influence of cable penetration construction on the cable heating processes there are considered three most common types of penetrations. The dependences of the temperature both of the cable structural elements and the cable penetration on time are obtained. It has been established that if the construction includes air space or a material, that contributes to intensive heat exchange, its fire resistance limit increases. The most dangerous type of cable penetration with filling the entire internal space with fire-fighting foam based on polyurethane foam has been determined in terms of heating the cable and reducing the fire resistance limit.
FIRE AND EXPLOSION SAFETY AT RECLAMATION OF SPENT COAL DEPOSITS
Leonid P. Vogman – Main Researcher, Doctor of Technical Sciences; Alexander V. Ilyichev – Deputy Head of Department – Head of Sector; Natalia V. Kondratyuk – Senior Researcher (FGBU VNIIPO EMERCOM of Russia)
Mining, exploration, and other activities lead to the destruction of lands, and it is important to restore them and use in the national economy. Coal mining is accompanied by the formation of a significant number of empty rocks, from which dumps (waste banks) are formed. These dumps are dangerous because if they contain a large amount of coal, at good thermal insulation there can arise sources of self-heating and then of self-ignition. The article considers the following ways to prevent the formation of sources of ignition in the dump layer: using water in pipelines inside the dump; utilization of combustible gases in solid waste dumps through pipelines with access to the torch or gas processing. The most effective way of fire extinguishing in the dumps of mines can be a combined method, which provides cooling agent (water) supply to the heated area followed by insulation of heated carbon-containing rocks, for example, clay.
STUDY OF THE EXPERIMENTAL EQUIPMENT INFLUENCE ON THE RESULTS OF FROTHER TESTS ACCORDING TO GOST R 50588–2012
Sergey N. Kopylov – Doctor of Technical Sciences, Head of Research Center of Automatic Detection and Extinguishing Systems, Senior Researcher; Dmitry S. Shentyapin – Head of Department; Evgeny V. Baranov – Candidate of Technical Sciences, Deputy Head of Department – Chief of Sector; Vladimir V. Grishin – Senior Researcher; Evgeny E. Arkhipov – Senior Researcher (FGBU VNIIPO EMERCOM of Russia)
The article presents results of comparative experimental studies in accordance with GOST R 50588 using foam generators GPS-100, that are manufactured according to the drawings of FGBU VNIIPO of EMERCOM of Russia, and generators received in recent years by the units of FGBU FPS IPL within the framework of centralized delivery. They are used at frothers testing to determine one of their main indicators – «foam expansion».
HOW TO SHORTEN EXCESSIVE OFFICIAL CORRESPONDENCE IN THE FIELD OF FIRE SAFETY
Ivan A. Bolodyan – Main Researcher, Doctor of Technical Sciences, Professor, Honoured Reseacher of the Russian Federation; Vladimir A. Bylinkin – Chief of Sector, Candidate of Technical Sciences; Leonid M. Меshman – Leading Researcher, Сandidate of Technical Sciences, Senior Researcher (FGBU VNIIPO EMERCOM of Russia)
The necessity and legitimacy of citizens’ appeals to the state bodies on fire safety issues are considered. The correspondence volume between the Emergencies Ministry and VNIIPO of EMERCOM of Russia on the one hand and design firms and individual entrepreneurs on the other hand has been extremely increased recently. The role of self-regulatory organizations, which they should perform in training and professional development of specialists and personnel to their subordinate design organizations and individual designers, is pointed out. There are proposed measures to limit the flow of official correspondence.
SUPPORT FOR EXPORT OF RUSSIAN FIRE PRODUCTS
Andrey V. Kosov – Head of Sector; Kirill A. Mazaev – Deputy Head of Department; Olga G. Kaspina – Deputy Head of Department; Yuri V. Kapushchak – Senior Researcher; Anatoly A. Shestaev – Head of Sector (FGBU VNIIPO EMERCOM of Russia)
The article considers the main issues related to the development of export of fire-fighting products of Russian manufacturers. The main task of forming and maintaining the “Catalog of exported fire products of Russian manufacturers” is assigned to the Interdepartmental working group. This article can be useful for manufacturers of fire products as a reference material.
FIRE SAFETY OF ELECTRIC GENERATOR SETS
Gennady T. Zemsky – Candidate of Chemical Sciences, Leading Researcher, Senior Researcher; Alexander V. Ilyichev – Deputy Head of Department – Head of Sector; Natalia V. Kondratyuk – Senior Researcher (FGBU VNIIPO EMERCOM of Russia)
Autonomous power plants or individual power generators are used to obtain electric energy in the absence or failure of transmission lines from the Central power supply. Fire danger of these units is caused by the use of internal combustion engines operating on different types of fuel (diesel fuel, gasoline, compressed or liquefied gas).
Fire safety of electric generator sets is similar to fire safety of boiler rooms and garages. However, there are no special sections in fire safety regulations concerning the electric generator sets.
This article presents the necessary information taking into account some special features of electric generator sets and can be used at the reissue of regulations.
URGENCY OF DEVELOPMENT OF THE UPDATED METHOD FOR EVALUATING FIRE RESISTANCE OF OPENINGS FILLING IN FIRE BARRIERS IN FRAMEWORK OF THE EEU
Vsevolod V. Ushanov – Head of Sector; Valery I. Shchelkunov – Candidate of Technical Sciences, Leading Researcher; Sergey T. Lezhnev – Leading Researcher; Kseniya D. Isavnina – Researcher (FGBU VNIIPO EMERCOM of Russia)
There was developed the first version of the interstate standard draft based on the analysis of provisions of national, international and European standards that define the requirements to fire resistance test methods for openings filling structures in fire barriers. The relevance of developing a harmonized standard that fully corresponds to the current international standards is justified.
FEATURES OF FIRE RISK CALCULATIONS FOR SPORTS FACILITIES WITH MASS STAY OF PEOPLE
Aleksander V. Krasavin – Chef of Department of Industrial, Nuclear, Radiation and Fire Safety and GOCHS, Candidate of Technical Sciences; Vladimir L. Karpov – Main Specialist of Department of Management of Industrial, Nuclear, Radiation and Fire Safety and GOCHS (FAU «Glavgosexpertiza of Russia»); Maksim V. Fomin – Senior Researcher; Irina V. Ushanova – Researcher (FGBU VNIIPO EMERCOM of Russia)
There are considered the features of fire risk calculations for objects with mass stay of people in accordance with the provisions of “Methods for determining the fire risk ratings in buildings, structures and fire compartments of different classes of functional fire hazard”. The main errors and inaccuracies in fire risk calculations are formulated and their consequences are described. The standard variants of calculations are offered.
ASSESSMENT OF FIRE DISTANCES BETWEEN OBJECTS OF DIFFERENT PURPOSES. FIRE IN PREMISES OF RESIDENTIAL AND PUBLIC BUILDINGS. CALCULATION EXAMPLE
Alexey S. Baranovsky – Head of Sector; Peter A. Leonchuk – Head of Sector; Stanislav A. Zuev – Candidate of Technical Sciences, Leading Researcher; Valery G. Shamonin – Candidate of Physical and Mathematical Sciences, Leading Researcher, Senior Researcher (FGBU VNIIPO EMERCOM of Russia)
The work continues to consider approaches to the justification of fire gap reducing between objects of different functional purposes and is a continuation of publications [1–4]. There is carried out the evaluation of the temperature in a room (fire compartment) at fire at the mode controlled by ventilation, as the maximum temperature value is reached. Fire in a room on the first floor of a three-storey kindergarten building is analized. There are considered two limiting cases of heat exchange with room walls: isothermal and adiabatic. The calculation is carried out for the characteristic parameters of residential and administrative buildings (where fire occurs).
The solution of the system of 7 transcendental equations was carried out by Seidel method for two limiting cases: adiabatic and isothermal. The temperature values were close (the difference was ≈ 0.5 %).
FIRE SAFETY IN THE HAZE OF YEARS. GLORIOUS WAY OF FORMATION AND DEVELOPMENT