CONTAM simulation lab

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

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

 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

1. Venting (opening of natural ventilation elements such as exhaust windows): Opening of a vent increases the leakage gap area at the height where it is located. Therefore, it plays a role in pulling the neutral band to the venting position(Refer to the Figure 7.9 of "Smoke Movement and control in High-rise Buildings - George T. Tamura, P.E/1994"). 2. Outside air Supply to the vertical shaft : Pressurization by the supply of outside air moves the vertical shaft pressure line to the right, and the resulting temperature change causes the slope of the pressure line to approximate that of the outside air. The volume flow rate of pressurization and the amount of parallel movement of the vertical shaft pressure line to the right are proportional. #Vertical #shaft #pressure #changes #venting #pressurization

Q(Lab) :  I'm looking for information on what the combustion products are for each type of combustible, can you help me? A(ChatGPT) :  Sure, I can help you with that. However, the combustion products depend on the type of combustible being burned. Here are the common types of combustibles and their combustion products: Hydrocarbons (such as natural gas, propane, gasoline, and diesel fuel) - The combustion products of hydrocarbons are water vapor (H2O) and carbon dioxide (CO2), along with other gases such as carbon monoxide (CO) and nitrogen oxides (NOx) that are produced depending on the combustion conditions. Biomass (such as wood, charcoal, and agricultural waste) - The combustion products of biomass are primarily water vapor (H2O), carbon dioxide (CO2), carbon monoxide (CO), and small amounts of other gases like nitrogen oxides (NOx) and sulfur dioxide (SO2). Coal - The combustion products of coal depend on the type of coal being burned, as well as the combustion conditions. Gen

​ Predict vertical shaft temperature just before a fire starts * Vertical shaft temperature variable - Weather factors: ambient temperature, wind, sun position - Architectural factors: location of the vertical shaft in the building (center, edge), leakage characteristics of the vertical shaft, insulation characteristics of the building - Thermal factors: outside air entering the building, heating load, cooling load, people, thermo-equipments * Vertical shaft temperature prediction method - Option 1: Using EnergyPlus program, https://blog.naver.com/hbscd/222929116510 - Option 2: Reflect the contents of EN 12101-13 (2022), clause 8.2.2 in the domestic TAB procedure --> Reflect the temperature of buildings of similar use and scale Prediction of temperature according to pressurization of vertical shaft after fire * Vertical wind temperature variable - Weather factors: outside air temperature, wind, sun position - Architectural factors: location of the vertical sh