• Proceedings of the Korean Institute of Building Construction Conference
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• 2022.11a
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• pp.141-142
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• 2022

Recently, fires in logistics warehouses in Korea are continuously increasing. In addition, the need for fire safety in logistics warehouses is emerging. So, it is believed that it is necessary to establish standards for vent facilities under effective smoke control for the evacuation safety of residents in logistics warehouses. Therefore, this paper compares the standards related to combustion facilities in Korea, the United States, and Japan, and applies the design method to logistics warehouses of domestic materials to predict smoke drop time and use it as a basic data for improving domestic smoke facilities standards.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2008.04a
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• pp.209-213
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• 2008

The effects on the performance of natural smoke exhaust ventilators installed in high-rise buildings were analyzed depending on the wind velocities and smoke temperatures using CONTAMW tool. The results showed that the smoke exhaust ventilators can maintain given performances in such conditions as low smoke temperatures and low wind velocities. However, high smoke temperatures and high wind velocities can prevent the smoke ventilators to exhaust smokes from the fire room. Significant changes in stack effects in high-rise buildings can also occur with the opening of smoke ventilators in the fire floor.

• Journal of the Korean Ceramic Society
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• v.43 no.5 s.288
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• pp.284-292
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• 2006

$MgTiO_3{\cdot}CaTiO_3{\cdot}SrTiO_3$ system ceramics (MCST) were synthesized to study the effect of Ca addition amount and Sr substitution on temperature coefficient of resonance sequency. Temperature coefficient of resonance frequency was slightly increased by small amount ($i.e.{\sim}5%$) of Sr substitution. In case of 50% to 75% addition amount of $MgTiO_3$, decrease of quality factor was not observed with increasing dielectric constant.

• Fire Science and Engineering
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• v.32 no.5
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• pp.57-66
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• 2018

A sports center fire in Jecheon that caused 29 deaths and 40 injuries was analyzed based on initial response and management in order to investigate the causes of the casualties. The aspects of initial response included delay of reporting 119, not being guided to the exit for the body scrubber on the $2^{nd}$ floor for escape, opening the fire doors of the exits on the $1^{st}$ floor and $3^{rd}$ floor, not closing the fire door of the main stairs on the $3^{rd}$ floor, and not doing an emergency broadcast. The management aspects included closing the alarm valve of the sprinkler system on the $1^{st}$ floor, starting-stop of the fire pump controller, neglecting leakage of water and electricity between the false ceiling and ceiling in the parking lot, hiding the exit light in the ladies bathroom lounge on the $2^{nd}$ floor and piling up things in the exit, neglecting the button of an automatic door on the $2^{nd}$ floor, conventional fire safety management, insufficient inspection of fire equipment, and not working fire shutters and smoke exhaust windows.

• The Journal of the Korea Contents Association
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• v.20 no.10
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• pp.308-325
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• 2020

This study examines factual facilites safety of long-term care facilities for eldery, for improvement of Korean policy. So, This study reviewed policies of facilites safety of long-term care facilities on main OECD countries. We analyzed factual survey of facilites safety of long-term care facilities in Seoul metropolitan area. The results of the study were as follows: First, There were differences of law and rule of facilites safety of long-term care facilities in comparison with those of social welfare facilities, child day-care center, hospital. Second, it was the result of location condition analysis. Long-term care facilities in the Seoul metropolitan area were located on more than six floors of buildings. The location conditions of private facilities are weak compared to those of corporations and local governments. Third, there were the result of internal structure of facilities. Overall, the placement status was insufficient. For instance, there are smokeproof masks/fireproof blankets, smoke windows(fire safety windows), smoke smothering. In addition, there were places where legal essential installation structures were insufficient. Private facilities were generally insufficient in facility structures compared to those of local governments and welfare corporations. Fourth, there were the result of safety management. It was confirmed that private facilities were insufficient compared to local government facilities. For instance, there are safety management analysis, response manuals, fire preparedness training, etc. Finally, implications and future directions policies of facilites safety of long-term care facilities were discussed based on the finding of the study.

• Applied Chemistry for Engineering
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• v.9 no.2
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• pp.278-285
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• 1998

In a fixed bed reactor, adsorption capacity of $SO_2$ in simulated flue gases was investigated with NMO(natural manganese ore), composed of various metal oxides, iron ore and $CuO/{\gamma}-Al_2O_3$ as adsorbents. The experiment carried out in a fluidized bed reactor with variables such as gas velocity, temperature and particle size. Iron ore was excluded in the fluidized bed reactor experiment for the lower adsorption capacity. The adsorption of $SO_2$ in metal oxide is a typical chemisorption because the adsorption capacity of all adsorbents increased with temperature. The effect of particle size on the adsorption capacity was varied with the ratio, $U_o/U_{mf}$ and the difference of $U_o-U_{mf}$. $U_o$ is the gas velocity, $U_{mf}$ is the minimum fluidization gas velocity. $U_o/U_{mf}$ and $U_o-U_{mf}$ explain the behavior of the gas and solids in the fluidized bed reactor. From the performance equation of the fluidized bed reactor, kinetic reaction rate constants were obtained by the non-linear least square method. The adsorption capacity of NMO proved the potential use of $SO_2$ adsorbents.

• Journal of the Society of Disaster Information
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• v.13 no.2
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• pp.233-248
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• 2017

Uniform laws and regulations and reasonable design is necessary for the prevention of possible fire in super high-rise building. To this end, this study focused on super high-rise and massive building-related architectural review performance-based design (PBD) evaluation disaster impact assessment (DIA), and provided fire engineering measures for improving fire prevention on the basis of performance-based design by analyzing the buildings subject to these systems and problems in terms of contents. Above all, in the aspect of law and standard improvement, first, with regard to dual parts of two statutes though significant portion of them has the same contents in performance-based design (PBD) evaluation and disaster impact assessment (DIA), it is necessary to operate the systems after making them conform with each other and consolidating or abolishing them. Second, if it is impossible to consolidate or abolish performance-based design (PBD) evaluation and disaster impact assessment (DIA), the areas of contents of performance-based design (PBD) evaluation and disaster impact assessment (DIA) should be precisely classified and established. Next, engineering improvement measures against fire hazard in super high-rise building are as follows. First, it is necessary to revise the provisions of straight-run stairs in special escape stairs. And in case of installing a mechanical smoke exhaust system instead of smoke vent, sandwich pressurization used in the United Stated should be permitted. Second, with regard to smoke control system for special escape stairs, it was shown that there was necessity for revising the standards in order to enable air to be supplied according to section in case of fire, carrying out performance-based design, and the like from the early design stages to the completion stages. In the future, it is expected that an epoch-making contribution will be made to a decrease in casualties and property damage due to fire in case of super high-rise building where the results can be reflected after carrying out a study on maintenance and carrying out an additional study on other considerations of super high-rise building together with reflecting the improvement measures provided in the above-mentioned study.