Abstract
In the present study, the relevance of the airflow to the response time of the smoke detector has been investigated regarding the different air purifier locations by Fire Dynamics Simulator (FDS). Particular attention has been devoted to the impact on the smoke detector response with different device types, i.e., top-discharge and front-discharge air purifiers. Additionally, the response delay rate regarding the fire sizes (200 kW and 550 kW) was also evaluated with the top-discharge type purifier. The obscuration plots suggest that the response delay rate generally increases when the air purifier and the smoke detector are in a straight line. The change in the delay rate of the detector was distinct for the top-discharge type device due to the formation of a current barrier by the ceiling jet flow, and a nearby physical barrier (e.g., wall) can further suppress the flow diffusion during a fire event. The delay rate tends to decrease with the increment of the fire intensity.
Highlights
Detector Revealed by Fire DynamicsRapid global warming is likely to be related to the increase of the periodical appearance of severe dust storms in East Asia, namely, the yellow dust is an atmospheric phenomenon that carries industrial pollutants via strong winds, threatening the environment and human health
The present study aims to explore the link between the responsivity of a smoke detector The present study aims to explore the link between the responsivity of a smoke defrom automatic fire detection systems and the indoor airflow generated by an air purifier in tector from automatic fire detection systems and the indoor airflow generated by an air the presence of home of appliances
The response time of the smoke detector during the air purification was analyzed by the response delay rate of the detector regarding the mounted location
Summary
Rapid global warming is likely to be related to the increase of the periodical appearance of severe dust storms in East Asia, namely, the yellow dust is an atmospheric phenomenon that carries industrial pollutants via strong winds, threatening the environment and human health. A study by Shim et al.The found thatinthe response characteristic of smoke detectors changes clean effect regarding the. Park et al reported that ionized smoke detectors have an inversely proportional effect to the response characteristics of wind speed changes [13]. A study by Shim et al found that the response characteristic of smoke detectors varies according to the initial combustible types such as oil, wood, rubber, and wet wood. The changescharacteristics in clean effect regarding the discharge directionair of conditioning the response of fire detectors in a ceiling environment At this time, the air discharged through the outlet circulates the indoor air and operates as a circulation-type air purifier that moves particles, such as indoor dust, to the vicinity of the lower inlet [20].
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