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140 José Renato Coury et al.

Table 20
Detailed dimensions of the AN 3.68 cyclone
Dimension (cm) AN 3.68
D 3.68
c
D 1.01
in
D 1.09
e
B 1.28
H 7.07
h 2.33
Z 4.74
S 1.55
H 2.26
cup
D 3.10
cup
Source: Adapted from Peters et al. (57), with permission from Elsevier Science.

can be better adjusted to the PM criteria; however, it has a D cut size of 2.7 µm at
2.5 50
its design flow rate. The SCC curves show a longer tail in the coarse particles region.
Field experiments were carried out by monitoring the ambient air of a US city. The
authors had some concern about the effect of the particle loading variations and with
the performance of the separators after becoming dirty from use.
4.6. Examples
Example 7
Deduce the flow rate and derive the performance curve for the SRI II cyclone working at
23°C at atmospheric pressure for a cut diameter of 2.5 µm. Compare it with the PM
2.5
(WINS) criterion.

Table 21
Adjusted Parameters for Eq. (74), Referring to the SCC 2.141, SCC 1.829, and AN
3.68 Cyclones and the WINS Impactor
Cyclone: SCC 2.141 SCC 1.829 AN 3.68 WINS

Flow rate: 6.7 L/min 7.0 L/min 5.0 L/min 24.0 L/min 28.1 L/min 16.7 L/min
a 1 1 1 1 1 1
b −1 −1 −1 −1 −1 −1
c a 2.52 2.35 2.44 2.72 2.33 2.48
d 0.1823 0.1534 0.1270 0.1926 0.1945 0.3093
e 0.3005 0.2640 0.2160 0.6318 0.6688 3.3683
D (µm) 2.09 1.96 2.08 2.38 1.98 2.05
84
D (µm) 3.22 3.04 3.16 3.17 2.76 2.85
16
GSD 1.24 1.24 1.23 1.15 1.18 1.18
a c = D .
50
Source: Adapted from Peters et al. (57), with permission from Elsevier Science.