Abstract
Recently, sprinkler systems have been designed based on hydraulic calculations to determine the diameter of the water supply pipe. However, the hydraulic calculation currently applied in the underground parking lot area of apartments is generally applied for economic benefits obtained by reducing the pipe size specified in the National Fire Safety Codes Installation Standard. However, the Standard overlooks the nature of hydraulic calculation. Therefore, this study examines and analyzes the flow rate, pressure, and flow rate relationship obtained by supplying a capacity higher than the water supply-demand capacity required for the hydraulic calculation as the water supply capacity of the fire pump. Accordingly, through suggesting an improvement in pressure-reducing valve installation, the firefighting system separation, pipe-diameter change application, the engineer's skill, water supply capacity, and water demand capacity could be matched to uniformly supply the minimum pressure and flow rate for each sprinkler head. It is expected that it can be improved in a direction that satisfies the hydraulic calculation standards.
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