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Which of the following statements is incorrect regarding the design flow calculation of rainwater pipe sections? ()
[Answer]: The design flow damage of D rainwater pipe section can usually be calculated using two methods: area superposition method and flow superposition method. The area superposition method for calculating rainwater design flow is simple, but the resulting design flow is relatively small and is generally used for planning, design, and calculation of rainwater pipes and channels; The flow superposition method requires segment by segment calculation and superposition, which is a complex process. However, the measured flow obtained by the method is usually larger than the area superposition method and tends to be safer. It is generally used for engineering design calculations of rainwater pipes and channels. The rainwater design flow rate of each designed pipe section is equal to the sum of the upstream pipe section transfer flow and the flow generated by this pipe section, that is, the flow superposition. Option D, this statement clearly describes the area superposition method.
2. Design flow rate of automatic sprinkler water
1. Two sets of automatic sprinkler systems designed for a certain garage have a clear height of no more than 8 meters.
. According to the regulations on page 10 of the Spray Regulations, the spray intensity is 8 liters per minute per square meter, and the effective area is 160 square meters. Therefore, the calculation of self spraying water consumption Q is as follows: according to the Yuqing Plan: self spraying water consumption Q=spray intensity x action area=8 × 160/60=21.33 liters/second2. According to the regulations on page 140 of the "Drainag
3. Hydraulic calculation results show that the actual water consumption of the two automatic sprinkler systems is Q1=35.05 liters/second and Q2=38.48 liters/second, respectively. When calculating the capacity of a fire water tank or fire water pool, it should be calculated according to Q2. Additional information: Automatic sprinkler system is a type of fire extinguishing device widely used in various fixed fire-fighting facilities. Its price is relatively low and its fire extinguishing efficiency is high. According to different functions, automatic sprinkler systems can be divided into two types: manual control and automatic control. The system is equipped with an alarm device that can automatically sound an alarm in the event of a fire. The automatic control fire sprinkler system in Zhenhe can not only spray water automatically, but also work synchronously with other fire-fighting facilities, effectively controlling and extinguishing initial fires. (Reference source: Baidu Baike - Automatic Sprinkler System)
3. Calculation formula for design second flow rate of water supply
The calculation formula for design second flow rate of water supply is Qs=μ × n × Qd. In the formula for calculation code of design second flow rate of water supply, Qs represents the design second flow buffering amount, measured in liters per second (L/s). μ is the coefficient of flow variation, taken from 1.1 to 1.2, used to consider the peak and fluctuation factors of flow, en
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