Relationship between induced draft fan flow rate and operating condition flow rate
Thread Content
In a system, the parameters of the exhaust fan are 180,000 Nm3/hour, and the local air pressure is 81.55 KPa. There is a tower-type device in front of the exhaust fan, and it is necessary to calculate the gas velocity inside the empty tower; the operating temperature is 40°C. So does the gas volume need to be converted into the operating condition gas volume? It is still calculated based on the induced draft fan parameters of 180,000 m3/hour. My skills are limited, so I hope everyone can give me some advice.
I did the calculations and found that this corresponds to a flow rate of 250,000 m3/H under operating conditions. So, should the gas flow rate inside the tower be calculated based on 250,000 m3/H or 180,000 m3/H?
With such high airflow, what kind of system is needed? The airflow should be calculated based on the actual operating conditions; the value indicated on the fan’s nameplate is merely a reference. The normal airflow is not as high as that indicated on the nameplate. If the actual airflow is higher than what is specified on the nameplate, it is possible for the gas to be under pressure. Additionally, if the current flowing through the fan is higher, the airflow delivered can also be higher than the rated value, though overloading may cause some damage
http://bbs.hcbbs.com/thread-680580-1-1.html