Hydraulic calculation of the fire extinguishing system of port facilities

Цель статьи – разработать алгоритм расчёта гидравлических характеристик системы пожаротушения для портовых сооружений. В системе пожаротушения имеется погружной насос, трубопроводы, предназначенные для транспортировки воды от места ее забора, до места возможного возгорания. Использован насос UGP-M-1210-04. Задачи исследования: анализ результатов испытаний; получение эмпирических зависимостей показателей работы насоса от его производительности, исследования работы насоса в сети. Проведены расчеты скорости истекающей струи и полной реактивной силы в рабочей точке насосной установки. Исследовано влияние скорости на реактивную силу. Анализ результатов показывает, что точность расчетов приемлема для инженерных расчетов. Полученный алгоритм расчета может быть использован при проектировании систем тушения пожаров в портовых сооружениях. The purpose of the article is to develop an algorithm for calculating the hydraulic characteristics of a fire extinguishing system for port facilities. The fire extinguishing system has a submersible pump, pipelines intended for transporting water from the place of its intake to the place of possible ignition. The UGP-M-1210-04 pump is used. Research objectives: analysis of test results; obtaining empirical dependencies of pump performance indicators on its performance, research of pump operation in the network. Calculations of the velocity of the expiring jet and the total reactive force at the working point of the pumping unit are carried out. The effect of velocity on the reactive force is investigated. Analysis of the results shows that the accuracy of calculations is acceptable for engineering calculations. The resulting calculation algorithm can be used in the design of fire extinguishing systems in port facilities.

Motion Control System Design for a Flying-Type Firefighting System with Water Jet Actuators

This paper presents the design and modeling of a flying-type fire extinguishing system. Fire accidents present very hazardous environments, and firefighters are in danger of losing their lives while putting out the fire. Strict safety measures should be considered to guarantee safe working conditions for firefighters, which is not the case every time, as fatalities and casualties are still being recorded. For this reason, a novel fire extinguishing system is proposed to provide more safe firefighting and survivor searches. The system studied in this paper is a pilot model that consists of a water jet-based actuation system to control the flying motion of the robot. The dynamic model of this flying robot is derived using the actuation forces, water jet system characteristics, and related information. The mathematical system model is detailed, a sliding-mode control system and a proportional-integral-derivative controller are designed, and comparative simulation tests are carried out.

Modern fire safety systems in shopping and entertainment centers

Currently, the number of shopping centers in Russia is increasing. For their construction, new combustible materials and design solutions are used. This creates a high fire load and requires fire safety measures. To ensure the fire safety of visitors, structural features of buildings are essential; it is also crucial to take into account the psychophysiological characteristics of people in these buildings and their level of familiarity with the main structural elements of the building, willingness to find the fire sign and do their best to leave the building. The article describes promising fire safety systems for shopping centers, their advantages and disadvantages. A specialized system of fire extinguishing means consisting of interconnected software controls and structures and a gas fire extinguishing system and smoke curtains are described.

Numerical Study on Flow and Release Characteristics of Gas Extinguishing Agent under Different Filling Pressure and Amount Conditions

The fire-extinguishing system is an indispensable fire-protection facility on the aircraft. In order to guide weight reduction of the aircraft’s fixed gas fire-extinguishing system by improving its release efficiency, so as to improve fuel economy and reduce carbon emissions, the influence of filling pressures and filling amounts on the release efficiency of gas extinguishing agent along pipelines were studied based on numerical simulations. The release process of the fire-extinguishing system was analyzed. The effects of the filling pressure and filling amount of Halon 1301 agent on the release characteristics, such as release time, mass flow rate, and gasification ratio, were studied. Results show that the release process can be divided into three major phases, which are firstly the initial rapid filling of the pipeline, secondly the concentrated release of the liquid extinguishing agent, and thirdly the gas ejection along the pipeline. The second phase can also be subdivided into two stages: the outflow of the liquid extinguishing agent from the bottle, and the release of the residual liquid extinguishing agent along the pipeline. The release characteristics of the fire-extinguishing agent were obviously affected by the filling pressures and filling amounts. When the filling pressure was relatively low (2.832 MPa), increasing the filling pressure can significantly increase the mass flow rate, shorten the release time, and reduce the gasification ratio of the extinguishing agent during the release processes. Under the same filling pressure, with the increase of the filling amount of the extinguishing agent, the release times and the gasification ratio showed a linear increase trend, while the average mass flow rates showed a linear decrease trend.

Design and implementation of IOT based Gas detection & fire extinguishing System

The protection of housesfrom thefire is a major challenge due to the growing population andgrowth of number of buildings. The gas detection and circuit breaking definitely will be the first step to reduce this problem. Furthermore it is more useful to provide much more security to the mines with less cost and without sacrificing the quality of equipment.The project presents a new way for securing the domestic and industrial buildings from causing the fire and providing the information to the user as soon as it detects the gas and fire. It also uses the IOT system, when identified the fire and informing the user through an application.As soon as the gas is detected the module turns off the nearby circuit board using H-bridge, so that nearby electrical devices would not cause any type of the causes for the fire. The usage of the low power devices would not consume much of the power. It also turns on the ventilator fan for exhausting of the gases.Using this kind of modules would enhance the opportunities for the safety of thebuildings and saving more lives.In this paper we have designed Internet of Things based system which enables the early detection of fire and gas leaks.

DESIGN OF A BUILDING FIRE PUMP SYSTEM WITH INTEGRATED PARALLEL PUMP

Multi-storey building must be equipped with a reliable building fire extinguishing system. The existing fire extinguishing system design is not equipped with a backup pump and a jockey pump. Based on The DKI Jakarta Governor Regulation No. 92/2014 and the Indonesian National Standard, to solve this problem, a building fire pump system is designed with a combination of the jockey pump, main pump and backup pump that connected in an integrated parallel arrangement. This design allows the backup pump to automatically run due to a pressure drop in the system pipe if the main pump fails or unable to build up pressure. When a fire occurs and a lot of hydrants are used, the backup pump will automatically run to help the main pump with a signal triggered by the pressure switch.