Dimensioning The Cooling System; Basic Information - Siemens SIMOTICS L-1FN3 Configuration Manual

Configuration
5.3 Examples
5.3.3

Dimensioning the cooling system

5.3.3.1

Basic information

Individual coolers
Based on the required effective force of the duty cycle F
by the individual coolers can be calculated first of all. This also corresponds to the cooling
capacity P
considered.
The values for rated force F
obtained from the data sheets.
The volume flow rate is defined; however, the value that is specified in the data sheet tables
should be used.
The pressure drop associated with the volume flow rate can be taken from the
characteristics for the primary section main cooler as well as for the primary section
precision cooler and secondary section cooling.
Temperature rise ΔT
determined for a given volume flow rate
Variables ρ and c
ρ = 998 kg/m
Connecting coolers in series
For cooling circuits connected in series, the greatest volume flow rate that results for the
individual coolers is the determining value for the entire system:
V ̇
g esamt
Calculate the individual pressure drops and temperature rises. Calculate the sum for the
pressure drop Δp
Δp
gesamt
ΔT
gesamt
If you are using one cooling unit or heat exchanger for all cooling circuits together, the
necessary cooling capacity P
follows:
P
kühl
132
, which a cooling unit or a heat exchanger must have for the cooling being
kühl,i
between the flow and return for the individual coolers can be
K,i
designate the density or the specific thermal capacity of water as coolant:
ρ
, c = 4180 J/(kg·K).
3
ρ
= max(V ̇ , V ̇ , V ̇ , ...)
1 2 3
and the temperature rise ΔT
gesamt
= Δp + Δp + Δp
K,1 K,2
= ΔT + ΔT + ΔT
K,1 K,2
= P + P + P
kühl,1 kühl,2 kühl,3
and heat Q to be dissipated under full load conditions is
N K,MAX
+...
K,3
+...
K,3
is calculated from the individual cooling capacities P
kühl
+... = Q + Q + Q
K,1 K,2 K,3
Configuration Manual, 10/2018, 6SN1197-0AB86-0BP2
, heat Q that must be dissipated
eff K,i
in each case:
gesamt
+...
as
kühl
1FN3 linear motors