scholarly journals Improving the installation of fire gasing with gelelating compounds

2021 ◽  
pp. 4-14
Author(s):  
Kostiantyn Ostapov ◽  
Yuri Senchykhyn ◽  
Volodymyr Syrovоi ◽  
Vadym Avetisian
Keyword(s):  
Geometric Parameters ◽  
Design Parameters ◽  
Optimal Planning ◽  
Special Device ◽  
Initial Cross Section ◽  
Fire Extinguishing ◽  
Technical Requirements ◽  
Technical Solutions ◽  
Planning Of Experiments ◽  
General Technical

It is established that the organization of fire extinguishing with the use of gel-forming compounds is a promising direction to increase the efficiency of extinguishing, especially in multi-storey buildings and structures of various functional purposes. Given the shortcomings of existing technical solutions for the use of gel-forming compounds for effective fire extinguishing, the need to develop new structures (spray barrels) is justified. The proposed solutions should ensure, above all, the safety of the fire rescuer. New designs of spray barrels must have a distance of supply of gelling compounds to make work of the operator safe, as well as meet the general technical requirements for fire extinguishers. An autonomous installation of extinguishing with gelling compounds for remote fire extinguishing by plane-radial jets of components of gelling compounds has been developed. It is proposed to fix the spray barrels with a special device to guide them to the object that has to be extinguished with verification of the angles to the horizon, angles of deviation relative to the plane of aiming, the height and width of the symmetrical placement. In this manner, it allows more efficient feeding at a distance of up to 10 meters of the two components of the gelling compounds and prevents premature or delayed mixing. Full-scale samples of RS-10 spray barrels were designed and manufactured to supply flat-radial jets of gel-forming compounds at a distance of up to 10 m. The method of optimal planning of experiments was used to calculate rational values of geometric parameters of the initial cross-section of the RS-10 spray barrel. The problem of 4-factor (second-order) optimal planning of the experiment of the process of plane-radial jet supply by means of RS-10 spray barrels is formulated and carried out. The main design parameters of the spray barrel (cutout of the rigid plate sector and its thickness) are determined, which correspond to the area of rational geometric parameters. The obtained results can be used in the design of extinguishing systems with gelling compounds

scholarly journals The Problem of Fire Control by Automatic Fire Extinguishing System

2021 ◽  
Vol 320 ◽  
pp. 02001
Author(s):  
Leonid Tanklevskiy ◽  
Aleksandr Tarantsev ◽  
Ivan Balabanov ◽  
Elena Murashkevich ◽  
Denis Lobov ◽  
...  
Keyword(s):  
Research Work ◽  
Test Methods ◽  
Fire Departments ◽  
Federal Law ◽  
Fire Control ◽  
Fire Extinguishing ◽  
Technical Requirements ◽  
Fire Containment ◽  
Fire Extinguishing System ◽  
General Technical

According to Article 117 of Russian Federal Law 123 of 2008, there is a class of objects historical buildings, exhibition complexes, energy facilities, etc. For these objects, it is not so necessary to eliminate the fire with automatic fire extinguishing systems, as to contain it until the arrival of fire departments. However, this law does not specify certain requirements for automatic installations, the main working substance of which is water and the solutions. The current situation makes it difficult to design, install and test automatic fire control systems. Given this, as well as the foreign experience and domestic developments in the field of automatic fire extinguishing systems, it is important to conduct a special research work. In this work, it is necessary both to conduct several fire tests in terms of the development of a fire with a limited water supply intensity, and to develop a draft of standard “Water automatic fire containment installations. General technical requirements. Test methods”.

scholarly journals Wind Turbulence Intensity at La Ventosa, Mexico: A Comparative Study with the IEC61400 Standards

Energies ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 3007 ◽  
Author(s):  
C. Lopez-Villalobos ◽  
O. Rodriguez-Hernandez ◽  
R. Campos-Amezcua ◽  
Guillermo Hernandez-Cruz ◽  
O. Jaramillo ◽  
...  
Keyword(s):  
Wind Speed ◽  
Wind Turbines ◽  
Turbulence Intensity ◽  
Structural Damage ◽  
Atmospheric Stability ◽  
Design Parameters ◽  
Power Sector ◽  
Wind Speeds ◽  
Technical Solutions ◽  
Large Wind

Wind speed turbulence intensity is a crucial parameter in designing the structure of wind turbines. The IEC61400 considers the Normal Turbulence Model (NTM) as a reference for fatigue load calculations for small and large wind turbines. La Ventosa is a relevant region for the development of the wind power sector in Mexico. However, in the literature, there are no studies on this important parameter in this zone. Therefore, we present an analysis of the turbulence intensity to improve the understanding of local winds and contribute to the development of reliable technical solutions. In this work, we experimentally estimate the turbulence intensity of the region and the wind shear exponent in terms of atmospheric stability to analyze the relation of these design parameters with the recommended standard for large and small wind turbines. The results showed that the atmosphere is strongly convective and stable in most of the eleven months studied. The turbulence intensity analysis showed that for a range of wind speeds between 2 and 24 m/s, some values of the variable measured were greater than those recommended by the standard, which corresponds to 388 hours of turbulence intensity being underestimated. This may lead to fatigue loads and cause structural damage to the technologies installed in the zone if they were not designed to operate in these wind speed conditions.

Design on Parameterized Drafting System of Centrifugal Fan

2010 ◽  
Vol 34-35 ◽  
pp. 192-196
Author(s):  
Jiang Zhu ◽  
Limin Chen ◽  
Ping Yuan Xi
Keyword(s):  
Aerodynamic Force ◽  
Geometric Parameters ◽  
Rapid Response ◽  
Design Parameters ◽  
Centrifugal Fan ◽  
Aerodynamic Design ◽  
Key Factors ◽  
Fan Speed ◽  
Force Calculation

The impeller is the important pneumatic part of centrifugal fan, and its structure performances are key factors which affect the whole performances of fan. The CAD module of centrifugal fan can realize the automation of aerodynamic force calculation. According to demands, computer can automatically complete aerodynamic force calculation and further determine major geometric parameters of impeller of fan. Speed coefficient and diametral quotient are two important parameters reflecting the character of ventilating fan. The relation curve between the speed coefficient and diametral quotient of various fans is plotted in this paper. The CAD module of impeller of centrifugal fan can realize such functions as aerodynamic design and parameterization drawing of impeller, and can accomplish rapid response from receiving design parameters to profiled impeller of fan, so that it can improve the quality of drawing.

scholarly journals GENERAL TECHNICAL ISSUES AS TO INTRODUCTION OF ILLUMINATING AND ORIENTING AND LIGHTING FIRE EQUIPMENT

2018 ◽  
Vol 1 (2) ◽  
pp. 37-42
Author(s):  
O Тymoshenko ◽  
O Borys ◽  
T Skorobahatko
Keyword(s):  
Light Flux ◽  
Test Methods ◽  
Technical Committee ◽  
Performance Standard ◽  
Light Power ◽  
Power Sources ◽  
Technical Requirements ◽  
Technical Specifications ◽  
Conducting Research ◽  
General Technical

The issue of the necessity of developing state standards in the sphere of illuminating and orienting and lighting fire equipment in Ukraine as for classification and general requirements in general and general technical requirements and methods of fire-rescuer lantern tests, in particular, are considered. The main provisions of these standards, which are developed in the Ukrainian Civil Protection Research Institute (UkrCPRI) and on the recommendation of the Standardization Technical Committee of Ukraine TC 25 "Fire safety and fire protection equipment" are outlined and have been earlier introduced to the Program of works for the national standardization for the year of 2018. The application of the basic provisions of these standards will contribute to the introduction of the leading world scientific and technological achievements in Ukraine in the development and production of illuminating and orienting and lighting fire equipment in general, and in particular testing of purchased foreign lanterns for compliance with standardized technical requirements, which will allow more objectively evaluate and compare their technical specifications. In this case, the results of the testing of some test methods and test equipment are presented, according to ANSI/NEMA FL1-2009 Flashlight Basic Performance Standard, when conducting research in UkrCPRI of the best world models of lanterns equipped with modern LED sources of light, power sources, electronics, etc., in particular two fire-rescuer lanterns: Peli 3765 LED (USA) and Vantage®180 (USA), a group fire lantern VULCAN® LED ATEX LANTERN (USA), which are currently supplied domestic fire trucks ООО «VК «Pozhmashyna» and experimental model of  personnel fire lantern developed in UkrCPRI. The specified test methods apply to the following basic lighting technology characteristics of the lantern, such as: light flux, peak power of light and duration of operation of the lantern, useful range of light beam.

scholarly journals An Overview on Major Design Constraints, Impact and Challenges for a Conventional Wastewater Treatment Design

2020 ◽  
Vol 9 (1) ◽  
pp. 7-16
Keyword(s):  
Wastewater Treatment ◽  
Analytical Calculation ◽  
Treatment Plant ◽  
Field Application ◽  
Design Parameters ◽  
Plant Design ◽  
Political Commitment ◽  
Design Constraints ◽  
Technical Requirements ◽  
Set Up

The conventional wastewater (WW) treatment plant includes physical, chemical, and biological treatment processes that can protect the receiving water bodies from water pollution. The common design constraints, challenges as well as environmental impact would make the wastewater treatment plant’s (WWTP) construction and operation more complex and demanding tasks. Major project constraints for WW plant design are economic, accessibility, fulfilling technical requirements, institutional set-up, health and environment, personnel capacity, and political commitment etc. Design methodology adopted in the current study included project location, unit selections, the design capacity, design period as well as proximity to the population and layout plan. The present manuscript discussed briefly about effluent quality requirements, design issues, environmental impacts, details, and safety concerns. It also highlighted the necessary flexibility to carry out satisfactorily within the desired range of influent WW characteristics and flows. In the present study, every step of the design was verified with Environmental Regulations and suggested to overcome all constraints while designing WWTPs so that standard operational code for the specific region could be implemented to achieve the best treatment performance. The results obtained from analytical calculation were optimized to achieve the best design parameters for field application. The optimized values also reduce the construction and operation cost during the field application.

Requirements for Future Civil Aircraft

1969 ◽  
Vol 73 (701) ◽  
pp. 397-407
Author(s):  
D. G. Brown
Keyword(s):  
Short Range ◽  
Market Research ◽  
Air Transport ◽  
Civil Aviation ◽  
Market Penetration ◽  
Technical Requirements ◽  
Civil Aircraft ◽  
Project Engineer ◽  
Technical Solutions ◽  
Market Requirement

Requirements fall into two categories: — (i) the demands of the market leading to a capacity requirement, which, dependent on the technical solutions, leads to a market requirement in terms of the number of aircraft. (ii) the technical requirements in terms of the vehicle characteristics required to provide the most competitive aircraft to achieve maximum market penetration. An appreciation of future civil requirements is presented as seen through the eyes of a project engineer rather than a market research economist. The title of the symposium suggests a focusing of attention on two main fields of air transport, namely, the successors to the supersonic long-range aircraft and the large subsonic short-range aircraft. It is, however, the intention to broaden the survey to cover the major areas of activity in civil aviation, since in many ways there may be inter-relations between the developments in different fields.

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