Indoor fire hydrant flow calculation | How to calculate how much water has been stolen from a fire hydrant?

『Calculation of indoor fire hydrant flow rate』Related information(v cone flow meter|rotary gas meter|gallon meter|gear meter|metal tube rotameter|glass tube rotameter|nutating disk meter|transit time ultrasonic flow meter|wedge flow meter|pd meters|hydraulic flow meter|ultrasonic water flow meter|water flow meter|air flow meter|magnetic water flow meter|oxygen flow meter|gas flow meter|argon flow meter|air velocity meter|gasoline flow meter|fuel flow meter|ultrasonic water meter|digital water meter|nitrogen flow meter|solid flow meter|Oxygen tank flow meter|digital water flow meter|diesel fuel flow meter|steam flow meter|02 flow meter|compressed air flow meter|oil flow meter|liquid flow meter)

1. Fire hydrant monitoring equipment

2. Analysis of the calculation of the volume of the fire water pool

The minimum effective volume of the fire water carrying tank needs to be determined based on the design flow rate and fire duration of each fire protection system. The answer to this question is 576m3 (option C), and the calculation process is: indoor fire hydrant water consumption (40L/s × 3h × 3.6)+automatic sprinkler fire extinguishing system water consumption (40L/s × 1h × 3.6)=576m3. The following is a specific analysis: According to Article 3.1.2 of the Technical Specification for Fire Water Supply and Fire Hydrant Systems (GB50974-2014), the volume of the fire water pool needs to meet the sum of the design flow rates of all fire protection systems acting simultaneously, and based on... Calculate the total water consumption based on the duration of the fire. If there is water replenishment, the amount of water replenishment during the duration of the fire needs to be deducted (this question does not mention water replenishment, so it does not need to be deducted). The key condition for this question is that a comprehensive building with a height of 75m belongs to a high-rise building. The flow of outdoor fire hydrants is supplied by the municipal pipeline network and is not included in the volume of the fire water tank. Design flow rate of indoor fire hydrant: 40L/s; The design flow rate of the automatic sprinkler fire extinguishing system is 40L/s. Fire duration: Indoor fire hydrant system: 3 hours for high-rise comprehensive buildings (according to Table 3.6.2 of GB50974-2014). Automatic sprinkler fire extinguishing system: 1 hour (according to Article 5.0.16 of GB50084-2017). Unit conversio

Calculation of indoor fire hydrant flow rate

n for calculation steps: 1L/s=3.6m3/h (conversion factor for the product of flow rate and time). Water consumption of indoor hydrant: $$40, text {L/s} times 3, text {h} times 3.6=432, text {m3} $$Water consumption of automatic sprinkler system: $$40, text {L/s} times 1, text {h} times 3.6=144, text {m3} $$Total volume: $$432, text {m3}+144, text {m3}=576, text {m3}, which cannot be superimposed (this question only involves fire hydrants and sprinkler systems, which can be added directly). Fire duration: Fire hydrant system: determined based on building type and height (e.g. 3 hours for high-rise buildings and 2 hours for low rise buildings). Automatic sprinkler system: generally not less than 1 hour, and may be extended in special locations (such as stacking warehouses). Water replenishment deduction: If there are two reliable ways to replenish water in the fire water tank, the amount of water replenishment needs to be calculated and deducted (this question does not provide the flow rate of water replenishment, so it is ignored). Minimum volume limit: When two water supplies are used, the effective volume should not be less than 100m3 (not less than 50m3 for fire hydrant systems only). The calculation result of this question is 576m3, which meets the requirement. A common mistake is to mistakenly include the flow rate of outdoor fire hydrants in the volume of the fire water tank. Confusing the duration of the fire (such as mistaking the sprinkler system time for the fire hydrant hall time). Ignoring unit conversion (directly multiplying L/s with hours results in incorrect results). Summary: The calculation of the volume of the fire water pool needs to clarify the system composition, design flow rate, and fire duration, a

Indoor fire hydrant flow calculation | How to calculate how much water has been stolen from a fire hydrant?

1. Fire hydrant monitoring equipment

2. Analysis of the calculation of the volume of the fire water pool

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