摘要：In this paper, the fire growth and smoke spread process in Large-space building have been investigated through the Fire Dynamics Simulator (FDS). What's more, the alarm process of the Line-type Infra-red Beam Smoke Fire Detector (LSD) and the Aspirating Smoke Detection System (ASD) have discussed, some valuable results have been obtained. The results indicated that the raise of the difference between the two height, and the smoke spread process is becoming slower at the constant heat release rate. The set of fire alarm system in large-space should be consider the “height advantage”, as the higher set of the smoke decent responding earlier than the lower ones. What's more, referring to the ASD system the aspirator samplers close to the building's edge should be affected by the edge. For the LSD system should determine the parameter of install by the numerical or experimental test to optimizing the performance of the LSD, which has been proposed in the paper. In summary, the research investigates the basic fire alarm process for the LSD and the ASD System in the large-space buildings, and these are valuable for the selecting and setting of fire alarm system in the large-space buildings.
