Introduction of 'Neutral zone position control type pressure differential system'

I would like to briefly introduce the 'Neutral zone position control type Pressure differential system(PDS)', which has the same functions as the existing fan air supply/exhaust pressure differential systems, but can be implemented at low cost. Please take a look at the information below and, if possible, I would like to hear your opinion.

​

1. Overview

This smoke control system is a neutral zone position control type smoke control system that can effectively prevent the spread of smoke to other floors due to the stack effect at low cost without applying the air supply and exhaust by fans. As of October 12, 2023, the application has been filed in Korea and the patent registration examination is in progress.

​

2. Problems with existing smoke control systems

Most conventional PDS use a smoke control method by supplying pressurization of outdoor air or depressurizing the discharge of smoke using fans. The investment cost per square meter for this PDS through fan supply/exhaust is very high compared to other systems(sprinkler fire extinguishing system, fire alarm system, etc.). The investment cost is known to be approximately 2 to 7 $/m^2 for sprinkler systems, approximately 1 to 3 $/m^2 for fire alarm systems, and approximately 10 to 30 $/m^2 for PDS. Although a detailed analysis has not yet been conducted, the cost of applying my new type is expected to be lower than the cost of 'fire alarm system'.

​

3. Solution

Method 1: Instead of applying the fan supply and exhaust method to the building, relatively large dampers are installed at the top and bottom of the building, and the position of the neutral zone is adjusted by adjusting the opening area to control the pressure at the vertical shaft at the same height as the fire floor. It is about a smoke control system that ensures this positive(+) pressure.


Method 2: The currently popular PDS applies the concept that all floors must be pressurized for one vertical shaft and/or its vestibules. However, this concept appears to be causing the cost of smoke control systems to be higher than that of other systems. Therefore, this patent applies the method of pressurizing the vestibules or corridors connected to all vertical shafts in the building only for the fire floor and one upper and lower floor. However, construction measures must be taken to ensure that the spread of smoke to other floors through the floor in areas excluding vertical shafts is minimal.


Method 3: Apply the above Method 1 and/or Method 2 independently or together, considering the characteristics of the building and the occupants.

​

4. Effect

a. The PDS by neutral zone position control can be implemented at a lower cost than that by supply/exhuast volume flow rate control.

b. By monitoring the status of the neutral zone location of a fire building, a fire suppression strategy can be effectively established by reasonably identifying the appropriateness of the entry location through the firefighter's entry window or door and the appropriateness of the firefighter's entry time.




Copyright 2023. Eam Taekyoung all right reserved.



#PDS #Pressure #differential #system #patent

댓글

댓글 쓰기

이 블로그의 인기 게시물

CONTAM simulation results of ‘Neutral zone position control type pressure differential system’

이미지
 I conducted a simulation of applying 'Neutral zone position control type pressure differential system' to a tall building in South Korea. 1. Building overview It is a tall building consisting of parking lots (B7F~B1F), commercial facilities(1F~2F), and apartment complexes (3F~43F, 6 households/floor), and has a structure in which one corridor in the center is connected to the 9 vertical shafts. The parking lots on each floor are connected to each other through vehicle ramps. Figure 1 - Basement floor Figure 2 - 3rd floor 2. Overview of 'Neutral zone position control type pressure differential system'    - Installation of 9 dampers connecting each of the 9 vertical shafts and the parking lot on the first basement floor (See Figure 1).    - Installation of 9 dampers connecting each of the 9 vertical shafts and outdoor air on the rooftop. 3. Scenario conditions    - Scenario common conditions (cold weather, dawn): outside temperature -10.4℃, atmospheric pressure 100,499 P
자세한 내용 보기

Evacuation strategies, 'Stay Put' vs 'Simultaneous Evacuation'

Q(Eam Taekyoung) : Evacuation strategies in the event of fire may change as the situation changes. However, basically, it seems necessary to understand that the Stay put strategy is an appropriate strategy to use when all three conditions below are met. 1. The building is designed to be fire-resistant, so each floor or apartment can be isolated from fire for a certain period of time. 2. Supply pressure smoke suppression equipment that protects the evacuation route from smoke infiltration is not installed. 3. Fire brigade can arrive quickly. A(ChatGPT 4) : In the context of fire safety and evacuation strategies, the "Stay Put" policy is indeed a strategy that is employed under specific conditions, primarily in certain high-rise buildings. This approach is based on several key factors: 1. Fire-Resistant Design: Buildings that are suitable for a "Stay Put" strategy are typically designed with fire-resistant materials and structures. Each floor or apartment is construct
자세한 내용 보기
A case where a fire on a high floor resulted in casualties on a lower floor? Q (Research Institute): Are there any cases around the world where smoke from a fire on the upper floor of a high-rise building spread to the lower floor? A(chatGPT): There have been several cases around the world where smoke spread from upper floors of high-rise buildings to lower floors. These incidents provide important lessons in many areas, including building design, fire safety standards, and evacuation planning. For example, the 2017 Grenfell Tower fire in London is one such example, where the fire quickly spread throughout the building, causing many casualties. This incident highlighted the safety of building materials, the importance of fire response systems, and the importance of evacuation plans in high-rise buildings. Another example is the 2010 Shanghai apartment fire in Shanghai. The fire broke out during construction, and flames and smoke quickly spread to the upper floors of the building, causi
자세한 내용 보기