Design, consultation and supervision of carpark ventilation and smoke management systems

In recent years, due to the expansion of the construction of high-rise buildings in large cities, and the presence of spacious and multi-storey car parks in the basement, ventilation of parking spaces is of considerable importance. Due to the closeness of the space and the possibility of human and financial damage, the safety and ventilation in accordance with international standards in normal and emergency conditions (fire) is one of the important issues that the ventilation system in normal conditions in order to maintain the quality and provide the required air And in emergencies, it is used to control and extract smoke. Given the above, the importance of designing and consulting air-conditioning systems for parking and smoke management is clear. The senior experts in the technical department of Madi Ayman Pasargad, using the world's knowledge and also with the help of CFD simulation in this field, can provide the most efficient design from a technical and economic perspective. It is worth noting that the design of these systems is in accordance with international standards such as BS7346 and NFPA92 and compliant with internal regulations and regulations.

design, consultation and monitoring of fire extinguishing systems

In recent decades, automatic fire fighting systems have played a very important role in protecting people's lives and their capital against fire. In the time of fire, the most important principle for preventing its propagation is the type of fire. The senior technical department of the Madimen Pasargad Company, using the world's knowledge and also with the help of specialized software in this field, can provide the most efficient design from the technical and economical point of view. It is worth noting that the design of these systems is in accordance with international standards and compliant with domestic laws and regulations.

 
 

Computational Fluid Dynamics (CFD) (CFD)

CFD is one of the branches of fluid mechanics, which uses numerical analysis and numerical algorithms, analyzes issues involving fluid dynamics. Computers are used to simulate the interaction of fluids and gases with boundary conditions. This branch of fluid mechanics connects old mechanics to computer science and its new computational abilities in the second half of the twentieth century and in the new century.

In this method, by converting certain differential equations governing the fluids into algebraic equations, numerical solution of these equations can be provided. By dividing the desired region into smaller elements and applying boundary conditions for boundary nodes, approximations of a linear equation system are obtained. By solving this system, the algebraic equations, the velocity, pressure, and temperature fields are obtained in the desired region. Using the results obtained from solving the equations, we can calculate the effects of input forces on the levels, the coefficients for and after, and the heat transfer coefficient.

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Using CFD to analyze smoke control systems

Fire is known as a phenomenon that has made human progress throughout history. But fire is as good as it is, it has created and harmed man and nature. The fires of natural areas and the fires of buildings and centers where people live or work are sometimes not compensated.

Engineers are always looking for solutions to predict and eliminate potential fire risks. Fire simulation is very difficult due to its complex nature and that it is highly dependent on environmental factors and in some cases unpredictable. Today, with the help of technology and its ever-increasing advances, they have been able to simulate the fire. Something that was very difficult and uncomplicated some decades ago.

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Simulating Car Park ventilation System using CFD

In recent years, the construction and operation of commercial and administrative complexes has grown in large cities due to the optimal use of existing space. Due to the compactness of space in such complexes, the design of parking, especially class parking, assumes the use of the maximum possible space. With these explanations and the abundant amount of cars in the closed space, these parking spaces surely require the design of a very powerful ventilation system. In such a situation, the use of a jet fan for parking is recommended. It is worth noting that in order to install a car park ventilation system, first, an air flow simulation in the parking should be made.

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Simulation of tunnel and subway ventilation using CFD

The main methods of ventilation of the tunnel can be described below:

A. Natural ventilation of the tunnel

B. Ventilation caused by the piston effect of the vehicle

C. Longitudinal ventilation

D. transverse and semi-permeable ventilation

E. Ventilation using chemicals

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Fire Alarm System

One of the security systems that affect commercial, office, residential building and other situations similar to this is fire alarm system. The fire detection system is referred to a collection of electronic components that is responsible for detecting fire at various locations.

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Fire extinguishing methods

In general, if we could control and limit one of the sides of the fire pyramid, which includes oxygen, heat, flammable materials or chain reactions, the fire will be restrained.

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fire extinguishing system FM200

Halon 1301 gas is one of the oldest and most effective fire extinguishing gases and is used in sensitive locations such as telecommunication and electronic industries. Halon gas has the lowest design concentration relative to all other gases. 

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Sprinkler systems

Sprinkler systems are the oldest automatic fire suppression system that are used for protecting people's lives and property from the risk of fire in residential homes, factories, warehouses and so on.

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CO2 Fire extinguishing system

Carbon dioxide or CO2 is a non-combustible, non-flammable, colorless, non-conductive, non-corrosive, and heavier than air, with a density of 1.5. It is extinguishing method is based on diluting oxygen and cooling the fire.

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Foam fire Suppression system

Foam fire suppression systems consist of three parts: thick foam, water, air. When the correct mixture of these three items is fixed, this part will be treated as a flame homogeneous foam blanket by combining mechanisms such as cooling, separating the flame source from the surface of the product, vapors, and choking the fire.

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Aerosol fire suppression system

Aerosol fire suppression system is based on powder (solid particles) and gas (aerosol). The solid aerosol is non-toxic and remains stable until it is activated electrically or by thermal reaction, and if activated A combination of powder and gas (Aerosol) with a silent effect.

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Watermist Fire Suppression system

The watermist fire suppression system is classified according to the NFPA750, which is a high pressure system, a medium pressure system and a low pressure system.

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Car Park Ventilation System with jet fan

According to the requirements, all buildings with a basement of three floors or more, or the with area of over 500 square meters in each basements, should be provided with car park ventilation system Equipped with a jet fan or a canalization system, in order to prevent the spread of heat, smoke and fire-fighting products.

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Car Park Ventilation Equipment

Jet Fans

The device is equipped with air blower, which are usually used with two speeds. Low speed and high speed. If the co-sensor senses the smoke congestion from cars, the co-controller controls the speed of the low or high speed operation in proportion to the smoke density.

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Smoke Control Systems (Smoke Control Systems ) 

When a building is burned, smoke usually spreads rapidly to points far from the place of fire.In fire engineering, smoke has been identified as the most important fatal agent in the fire of buildings. 

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Concepts and principles of smoke control

Smoke is the main cause of casualties in the event of fire.

According to statistics, 70% of the fire deaths in buildings are due to smoke and combustion products. Smoke from the fire space quickly moves to other spaces and floors and threatens human safety.

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