Calculating System Thermal Output - Juniper MX10003 Hardware Manual

Table 28: MX10003 Router Power Requirements at Maximum Temperature (55° C)
Fixed Chassis Configuration
Fully configured chassis running at high activity,
with QSFP28 optics and JNP-MIC1
Fully configured chassis running at high activity,
with QSFP28 optics and JNP-MIC1-MACSEC
Table 29 on page 73 shows how much power is available with AC and DC power supplies.
Table 29: Total Power
Number of Power Supplies
1
2
3
4
5
6

Calculating System Thermal Output

After you have calculated the power consumption for your configuration, you can use that information to
determine the system thermal output (BTUs per hour). To do so, multiply the power consumption in watts
by 3.41.
For example, in Table 27 on page 72
running at high activity, with QSFP28 optics, and JNP-MIC1 at 25° C typical temperature to be 1676 W.
Using that information we can calculate the system thermal output for the configuration:
Power consumption in watts * 3.41 = system thermal output in BTU/hr
1,676 W * 3.41 = 5,715.16 BTU/hr
Power Requirement at 55°
C (Watts)
2110 W
2180 W
AC
1600 W
3200 W
4800 W
6400 W
8000 W
9600 W
we calculated the power consumption for a fully configured chassis
Power Requirement
(Watts) with 90%
Efficiency
2344 W
2422 W
DC
1100 W
2200 W
3300 W
4400 W
5500 W
6600 W
73