378 IBM z13s Technical Guide
Heat released by configurations
Table 10-6 shows the typical heat that is released by the various zBX solution configurations.
Table 10-6 IBM zBX power consumption and heat output
Optional Rear Door Heat eXchanger (FC 0540)
For data centers that have limited cooling capacity, using the Rear Door Heat eXchanger
(Figure 10-4 on page 379) is a more cost-effective solution than adding another air
conditioning unit.
The Rear Door Heat eXchanger has the following features:
A water-cooled heat exchanger door is designed to dissipate heat that is generated from
the back of the computer systems before it enters the room.
An easy-to-mount rear door design attaches to customer-supplied water by using
industry-standard fittings and couplings.
Up to 50,000 BTUs (or approximately 15 kW) of heat can be removed from the air exiting
the back of a zBX rack.
Number of blades Maximum utility power (kW) Heat output (kBTU/hour)
77.324.82
14 12.1 41.14
28 21.7 73.78
42 31.3 106.42
56 40.9 139.06
70 50.5 171.70
84 60.1 204.34
98 69.7 236.98
112 79.3 269.62
Tip: The Rear Door Heat eXchanger is not a requirement for BladeCenter cooling. It is a
solution for customers who cannot upgrade a data center’s air conditioning units due to
space, budget, or other constraints.
Note: The Rear Door Heat eXchanger feature has been withdrawn from marketing and
cannot be ordered if not already present on the zBX Model 004.
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