Example: Dimensioning The Cooling - Siemens SIMOTICS L-1FN3 Configuration Manual

5.3.3.2

Example: Dimensioning the cooling

Requirement
A peak load motor with a primary section of the 1FN3300-2WC00 series is to be operated
with an effective force of the duty cycle F
necessary for this application. The primary section precision cooler and the secondary
section cooling system should also be used to prevent heat being transferred to the
machine.
The secondary section track is approximately 1.6 m long. There is a coupling point for the
heatsink profiles. The flow and return lines of the secondary section cooling system are
connected via combi distributors.
The medium flows through the primary section precision cooler, secondary section cooling
system and primary section main cooler in that order. To maintain the temperature difference
of 4 K between the flow temperature and the surface of the primary section precision cooler,
the recommended values from the corresponding data sheet are used.
Data from data sheet:
Volume flow:
Pressure drop:
Maximum heat dissipation:
Calculating the cooling capacity
Individual cooling circuits
The following results for the individual cooling circuits:
P
kühl,P,H
P
kühl,P,P
P
kühl,S
Total cooling
For a heat-exchanger unit that is designed for the complete series configuration, the
following must be assumed as a minimum cooling rating:
P
kühl,gesamt
P
kühl,gesamt
1FN3 linear motors
Configuration Manual, 10/2018, 6SN1197-0AB86-0BP2
= Q ≃ 995 W ‧ 0.8
2
P,H
= Q ≃ 35 W ‧ 0.8 = 22.4 W
2
P,P
= Q ≃ 93 W ‧ 0.8 = 59.52 W
2
S
= P + P
kühl,P,H kühl,P,P
= 718.72 W
= 0.8 F . A primary section main cooler is
eff N
V ̇ = 4 l/min
g esamt
Δp = 0.32 bar
P,H
Δp = 0.33 bar
P,P
Δp = 0.09 bar/m
S
Δp = 0.42 bar
KV
Δp = 0.31 bar
KS
Q = 995 W
P,H,MAX
Q = 35 W
P,P,MAX
Q = 93 W
S,MAX
= 636.8 W
+ P = 636.8 W + 22.4 W + 59.52 W
kühl,S
for all coolers
for main cooler
for precision cooler
for heatsink profiles
for each combi distributor
for each coupling point
for main cooler
for precision cooler
for secondary section cooling system
Configuration
5.3 Examples
133