Issues with fan airflow in accidents involving major liquid chlorine hazard sources
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I would like to ask how to select the air volume for an emergency fan? Is it calculated based on the volume of the building containing major hazard sources multiplied by the number of air changes, or is there another method? What are the requirements for the number of air changes? Are there any standards that specify requirements for ventilation volume? Thank you everyone
It should be determined by the air volume required by the system
First, determine the pattern of air flow, as well as the cross-sectional areas at the intake and exhaust positions; in particular, decide on the location for air intake within the building (such as through doors and windows or by using dedicated intake openings), and calculate the wind speed. The key is that the moving wind energy plays a vital role in effectively removing the leaked harmful gases. Especially in indoor factories in the north where warmth is needed during winter, the location of air intake should be taken into consideration. Axial flow fans are usually chosen, in combination with an online analysis alarm system for interlocking. Things like the fans automatically turning on when the concentration exceeds the limit, and so on. For reference.
In my understanding, the facility for storing liquid chlorine is a sealed space. In the event of an accident, the gas in the room is removed and treated using fans. I just don’t know how to calculate and determine this air exchange rate
I just can’t figure out what level of airflow is needed to remove the leaked harmful gases. So I think there should be a requirement for the air exchange rate in rooms. For example, if the air in a room is replaced twice per hour, then the volume of my room multiplied by 2 gives me the minimum airflow requirement for my fan. And then calculate the pipe diameter
To put it simply, refer to household exhaust hoods. There might be an issue with the reasoning; if it is the case that \"the facility for storing liquid chlorine is sealed.\" In the event of an accident, the gas in the room is removed and treated using fans. ”It’s practically impossible, right? In the case of using a household exhaust hood for ventilation in a sealed indoor space, with no external air supply, the smoke cannot be displaced. So perhaps there is an issue with the approach; with all due respect, this is just for your reference.