How should the exhaust volume for hazardous materials warehouses be calculated?
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Hazardous chemicals warehouse (180 sqm, 5m in height). It contains only solid sodium cyanide. How should the ventilation rate be calculated for natural ventilation?
Calculating the natural ventilation volume mainly takes into account the space size, gas emission volume, and air change rate. The specific steps are as follows: 1. First, determine the volume of the warehouse: 180 square meters × 5 meters = 900 cubic meters. 2. Then, determine the required number of air changes based on the properties of the stored items (such as solid sodium cyanide) and safety standards. Under normal circumstances, it is recommended that the ventilation rate in hazardous materials warehouses be 6–10 times per hour. 3. Calculate the total exhaust volume based on the number of air changes: Assuming an air change rate of 8 times per hour, the total amount of air that needs to be exhausted per hour is 900 cubic meters × 8 times = 7200 cubic meters. This result is a theoretical value; in actual operation, other factors such as the efficiency of the ventilation system and the outdoor environment must also be taken into account, with appropriate adjustments made. It is recommended to consult relevant professionals or use specialized ventilation calculation software for detailed design. .
This should be determined in accordance with the codes for ventilation design of industrial and civil buildings.