Design of the Ventilation System in an Underground Car Park: Local Mean Age of Air

2015 ◽  
Author(s):  
Sherif Gomaa ◽  
Mahmoud A. Fouad ◽  
Ahmed A. Fahim ◽  
Essam E. Khalil
Keyword(s):  
Ventilation System ◽  
Car Park ◽  
Local Mean

scholarly journals SMOKE CONTROL AND NOXES IN CAR PARKS

2017 ◽  
Vol 18 (2) ◽  
Author(s):  
COSTEL-MARIAN PIETREANU ◽  
ROBERT-DUMITRU STRUGARIU ◽  
VALERIU PANAITESCU
Keyword(s):  
Control System ◽  
Ventilation System ◽  
Extraction System ◽  
Energy Costs ◽  
Jet Ventilation ◽  
Smoke Control ◽  
Car Park ◽  
And Control

<p>The main purpose of this article is to describe the principles of CO ventilation in car parks and to provide a brief description of smoke extraction and control system. It provides information on the possibilities provided by jet ventilation. In closed car park, inRomania, we use for CO and smoke extraction system fans and a lot of ducts. In many country of theEurope, they use for this jet ventilation system, without ducts, characterized by low installation and energy costs.</p>

scholarly journals Designing Jet Fan Ventilation for an Underground Car Park by CFD Simulations

2018 ◽  
Vol 63 (1) ◽  
pp. 39-43 ◽  
Author(s):  
Miroslava Kmecová ◽  
Michal Krajčík ◽  
Zuzana Straková
Keyword(s):  
Exchange Rate ◽  
High Efficiency ◽  
Ventilation System ◽  
Cfd Simulations ◽  
Air Exchange Rate ◽  
Air Supply ◽  
Car Park ◽  
Computational Fluid Dynamics Cfd ◽  
Alternative Designs ◽  
Air Exchange

The aim of this study was to design a fire ventilation system with impulse jet fans for an underground car park. With respect to the number of parameters affecting the spread of smoke that need to be considered, there is a good chance of miscalculations if only conventional plain calculations are used in the design process. To avoid mistakes, visualize the fluid flow, and to compare the design variants it is practical to use computational fluid dynamics (CFD). In this study, CFD simulations were used to compare alternative designs of a fire ventilation system. In one alternative the exhaust shafts were located in both parts of the car park and the jet fans were directed to the corresponding shafts. The air exchange rate was 10-times per hour. In another alternative both exhaust shafts were located on one side opposite to the main air supply, and the air exchange rate was 15-times per hour. The results showed preference of the second alternative, when the smoke was completely exhausted and the visibility improved substantially, whereas in the first alternative the car park was not sufficiently ventilated even 600 seconds after the fire had been put out. The results emphasize that proper location of elements of the ventilation system is crucial to attain high efficiency of fire ventilation.

scholarly journals Study of Radon concentrations in a single-family home and their relationship with the ventilation system

2020 ◽  
Vol 19 (3) ◽  
pp. 443-456
Author(s):  
Pablo Villalba Espinosa ◽  
◽  
David Hidalgo García ◽  
Julián Arco Díaz ◽  
Juán Villalba Moreno ◽  
...  
Keyword(s):  
Present Article ◽  
Ventilation System ◽  
Single Family ◽  
Ambient Conditions ◽  
Two Samples ◽  
Car Park ◽  
Family Housing ◽  
Family Home ◽  
Dining Room ◽  
Radon Concentrations

In the last decade he has caused himself an increase of the education of the interior ambient conditions of the buildings caused by the appearing of numerous scientific reports that they relate them to serious diseases. Between these, the education of concentration of radon branded like carcinogen wilfully publicise one. The present article parses the concentrations of this gas that have taken place in a single-family housing and as the ventilation system in work has influence upon her. For it, two samples in three outbuildings of the house have been taken, (car park, dining room and bedroom). The first unaccomplished sample the ventilation of the spaces and the second with ventilation. The obtained peak concentrations when the ventilation system does not find itself in operation evidence values from among 391 and 94 Bq/ m3 coming right across over the doorsteps established in the standard 2013/59 EURATOM. On the contrary, the peak concentrations of radon decrease to values from among 71 and 29 Bq/ m3 interveningventilation. In this sense, it is confirmed that the ventilation system in work is determining to decrease the concentration of the gas in the analysed sojourns getting an average efficacy from the 62 %.

scholarly journals Simulation of Naturally Ventilated Underground Car Park with CFD

2020 ◽  
Vol 3 (SI3) ◽  
pp. SI22-SI28
Author(s):  
Huong Mai Thi Nguyen ◽  
Trương Tích Thiện
Keyword(s):  
Fire Safety ◽  
Natural Ventilation ◽  
Ventilation System ◽  
Urban Land ◽  
Navier Stokes ◽  
Ansys Fluent ◽  
Car Park ◽  
Effective Ventilation ◽  
Fire And Explosion ◽  
Cfd Method

Nowadays, the speed of urbanization is increasing rapidly, so the urban land area is fully utilized to build high-rise buildings, apartments, and commercial centers, and thus, the car tunnel parking and basement parking basements also become more popular. However, apartment fire and explosion, especially car fire and explosion is an extremely important issue that must be concerned in construction design. Therefore, it is essential to design an effective ventilation system in the parking basement when a fire occurs an effective ventilation system for the tunnel is really necessary for basement firefighting. When building up the car park, the importance is not only a reasonable architecture but also the ventilation and air quality of the tunnel because it directly affects human health. Decades ago, scientists had studied the solution to ventilate the car park. The computational fluid dynamics (CFD) method is also applied to determine the pressure and velocity intensity for buildings that detect residuals in architecture, thereby improving and providing a superior solution. More for this problem. Many studies related to this issue have been published internationally. Jiang (Jiang, Allocca, & Chen, 2004) also investigated natural ventilation by using Reynolds Averaged Navier - Stokes turbulence model (RANS). Khalil (Khalil, Shoukry, H.A, & Harridy, 2015) also examined the distribution of CO emissions from buses in a basement in Cairo using ANSYS FLUENT software.The basement car park is a popular solution to effectively use urban land, especially in commercial centers and apartments. However, the situation of apartment fire and explosion is a hot problem, partly due to the tunnel ventilation has not met the requirements of fire safety. Therefore, the design of the car park basement ensures fire safety as well as bring comfort to people. In this study, the problem of basement temperature and wind velocity by natural ventilation method will be analyzed and evaluated in accordance with ADPI standard and Carbon monoxide concentration with WHO standard to identify areas of unsatisfactory temperature and velocity to reasonably adjust and propose other suitable ventilation options.

scholarly journals Control of smoke flow using a jet-fan in an underground car park

2019 ◽  
Vol 128 ◽  
pp. 10007
Author(s):  
Marek Borowski ◽  
Marek Jaszczur ◽  
Michal Karch ◽  
Tomasz Burdzy
Keyword(s):  
Ventilation System ◽  
Flow Analysis ◽  
Contamination Level ◽  
Flow Visualisation ◽  
Cfd Simulations ◽  
Car Park ◽  
Simulation Results ◽  
Jet Fan ◽  
Dynamics Simulations ◽  
The Impact

Ventilation systems are used to provide ventilation for covered car parks and to control the smoke in the event of fire. In this paper the interaction between the fire ceiling jet and the flow driven by jet-fans is studied using CFD simulations. There is a number of parameters that can affect the flow of smoke that need to be considered. To avoid mistakes, fluid flow visualisation is highly required as well as in order to directly compare the different design variants. One of the best option to make flow analysis is to performed Computational Fluid Dynamics simulations (CFD). By CFD it is possible to detailed analyse and keep control of the flow of fluid, heat transfer and other related phenomena. It also helps predict the contamination level of Carbon Monoxide, heat and smoke intensity and distribution. In this study, CFD simulations were used to design, test and compare different design of a fire ventilation system. The research drew attention to the location of jet-fan type fans. The main objective of the study was to assess the impact of jet-fans on fire and to check if it is possible to evacuate people from the garage in less than 10 minutes. The simulation results emphasize the important location of the different elements on the functionality and efficiency of a fire protection system. Due to the evacuation of people from the garage, the simulation results suggest a 10 minute safety time for evacuation. During this period, high visibility and oxygen concentration, as well as low temperature allow for rapid evacuation.

scholarly journals CFD Analysis of Smoke and Temperature Control System of Car Park Area with Jet Fans

2020 ◽  
pp. 27-40
Author(s):  
M. T. Çakir ◽  
Ç. Ün
Keyword(s):  
Ventilation System ◽  
International Standards ◽  
Temperature Control System ◽  
City Hospital ◽  
Cfd Analysis ◽  
Closed Area ◽  
Parking Lot ◽  
Car Park ◽  
Jet Fan ◽  
Park Area

Basements of hospitals are generally used as indoor parking area.  When underground car parks are examined physically, it is not possible to ventilate them by natural roads. Therefore, in order to keep the density of harmful gases below certain limits; ventilation systems must be used. In this study, for a parking lot with a closed area of 19438.59 m²; jet fan system is designed and the performance of the system is simulated with Computational Fluid Dynamics (CFD). The covered parking area examined is located in Isparta; It is located on the 2nd basement of Isparta City Hospital.  The parking area is divided into 5 zones and CFD smoke analysis is made for the jet fan ventilation system designed for the parking area. The purpose of this study in Isparta City Hospital (basement-2) to examine the ventilation system is designed for parking areas using CFD.  The CFD analysis made allowed us to see the correct placement of the jet fans and to decide the best placement. In case of a fire, various scenarios were prepared in accordance with international standards and the best results were obtained.

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