XU De-qian,QIAN An-zhen.Research on Calculation Method of Design Flow of Sprinkler System[J].China Water & Wastewater,2020,36(22 22):130-135.
Research on Calculation Method of Design Flow of Sprinkler System
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第36卷
Number:
22 22
Page:
130-135
Column:
Date of publication:
2020-11-17
- Keywords:
- sprinkler system; design flow; asymmetrical arrangement; precise calculation method; simplified calculation method
- Abstract:
- Code for Design of Sprinkler Systems (GB 50084-2017) stipulates that the design flow of the system should be determined by the total flow of the sprinkler within the working area at the most unfavorable point when they are spraying simultaneously. The hydraulic calculation of pipe network can be carried out by the characteristic coefficient method when the system is symmetrically arranged. Most automatic sprinkler systems in practical projects are asymmetrically arranged, which makes the characteristic coefficient method only applicable for the most unfavorable branch pipe. For solving this problem, the hydraulic characteristics of the sprinkler system was analyzed, and formula named precise calculation method, which can be used to calculate flow of the sprinkler in the other branch pipe when system is arranged asymmetrically was deduced. The formula should be used with the assistance of progressive approximation method. Besides, the outflow of the other branch pipe in non-computational pipeline can be assumed as a hypothesis sprinkler. Introducing the parameters “k” and “n” to derive the relationship between outflow and water pressure at the end of the branch pipe, based on which a simplified calculation method was proposed. Through comparing and analyzing the results of the two methods, the feasibility of simplified calculation method can be verified.
Last Update:
2020-11-17