Lenze DSD - Manual (Page 175)

Lenze · Drive Solution Designer · Manual · DMS 4.2 EN · 12/2013 · TD23
175
7 Applications
7.18 Pump
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7.18.1.1 Symbols used
7.18.2 Data for the entry
7.18.2.1 Volume flow
7.18.2.2 Pumping height
7.18.2.3 Medium density
7.18.2.4 Efficiency of the pump
7.18.2.5 Rated speed of the pump
Symbol Description Dimension unit
g Gravitational acceleration (g = 9.81 m/s 2 ) m/s 2
Q Flow rate m 3 /h
h
opr
Pumping height m
J
add
Additional moment of inertia kgm 2
M
App
Torque of the application Nm
M
rated
Rated torque of the pump Nm
n
rated
Rated speed of the pump rpm
P Power of the conveyed medium kW
P
Pmp
Required power of the pump kW
η
Pmp
Efficiency of the pump
ρ The specific density of the conveyed medium . kg/dm 3
Symbol Description
Q Volume of the medium to be pumped per time unit
Symbol Description
h
opr
Pumping height
Symbol Description
ρ Specific density of the medium to be pumped
• Value can be entered directly or selected from the "Physical coefficients" table.
Density of liquids
Symbol Description
η
Pmp
Efficiency of the pump (data sheet of the pump)
Symbol Description
n
rated
Rated speed of the pump (see data sheet of the pump)