Lenze DSD - Manual (Page 179)

Lenze · Drive Solution Designer · Manual · DMS 4.2 EN · 12/2013 · TD23
179
7 Applications
7.19 Fan
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7.19.1.1 Symbols used
7.19.2 Data for the entry
7.19.2.1 Volume flow
7.19.2.2 Pressure increase
7.19.2.3 Efficiency of the fan
7.19.2.4 Fan rated speed
Symbol Description Dimension unit
J
add
Additional moment of inertia kgm 2
M
App
Torque of the application Nm
M
rated
Rated torque of the fan Nm
n
rated
Rated speed of the fan rpm
P Power of the medium kW
P
Vlt
Required power of the fan kW
Q Volume flow m 3 /s
Δp Pressure increase N/m 2
η
Vlt
Efficiency of the fan
Symbol Description
Q Volume of the fluid to be transported per time unit
Symbol Description
Δp Pressure difference between intake and outlet
Symbol Description
η
Vlt
Fan efficiency (see fan data sheet)
Symbol Description
n
rated
Rated speed of the fan (see fan data sheet)