Bulk Heat Dissipation - Nortel Passport 15000 Preparation Manual

52 Chapter 2 Planning considerations

Bulk heat dissipation

241-1501-205 5.2S2
cards, BIP, and cooling units, the total power dissipation for a fully
provisioned frame (two shelves) is up to 6000 W. The dissipation for one shelf
is calculated as
16 slots at 150 W each + 2 fabric cards at 75 W each + 2 cooling units + BIP
= 2700 W for a frame housing one shelf (one Passport 15000 or 20000)
The exact power dissipation of an individual Passport 15000 or 20000 shelf
will vary, depending on the number of function processors installed in the
shelf. To calculate a Passport 15000's total power dissipation, add the total
watts for each individual part (values for each part are shown in the table
"Power budget for a Passport 15000 or 20000 shelf assembly (fully
provisioned)" (page 52). To determine the power dissipation for a
Passport 15000 frame, add the totals for each shelf.
Table 7
Power budget for a Passport 15000 or 20000 shelf assembly (fully
provisioned)
Unit
Fabric slot of a Passport 15000
Fabric slot of a Passport 20000
Expansion slots 0E and 1E
(currently unused)
FP or CP slots
Fan unit
Note: These are maximum design values. Actual card dissipation will be
somewhat less depending on implementation.
The heat dissipation of a single Passport 15000 or 20000 shelf is 2580 W/m2,
and with two shelves is 5160 W/m2. These are maximum ratings. Typical
ratings are less.
Per unit Watts Quantity Total Watts
75 2
150 2
150 2
150 16
30 3
150
300
300
2400
90