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Cyclones 115

Fig. 6. Collection efficiency as a function of particle diameter, for three entry velocities:
curves obtained from the Iozia and Leith model (13) and experimental points from Dirgo and
Leith (17).

In the conditions of this example, the case of higher power consumption occurs for
the gas entry velocity of 20 m/s and particle-free gas. In this case, Eqs. (32)–(34) give
(  0.151 m )(0.060 m ) 
∆H =16  2 
 (0.151 m ) 

()a ∆H = 6.4

(  0.151 m )(0.060 m )  2
∆H =11.3  2  + 3.33
 (0.151 m ) 

()b ∆H = 5.1

(  0.151 m )(0.060 m ) 
∆H = 20  2 
 (0.151 m ) 
1
 0.151 m 0.302 m  3
×  
 (1.208 m 0.302 m )(0.453 m 0.302 m )(0.113 m 0.302 m ) 

()c ∆H = 4.8

The pressure drop [Eq. (31)] calculated utilizing the above values of ∆H above are
respectively