Estimating Power And Cooling; Cluster Power Consumption Calculation Worksheet (Per Cluster Building Block) - HP Cluster Platform Introduction v2010 Introduction Manual

1.5.4 Estimating Power and Cooling

Power consumed by a cluster is converted to heat, which is expressed in British thermal units
per hour (BTU/hr). You can calculate the heat load for a system by using the following equation:
Heat Load = Power (Watts) x 3.413 BTU/hr per Watt
In the preceding equation, 1 Watt equals 3.413 BTU/hr. A size 42U rack fully loaded with
dual-processor servers might use 13.65 kW of power, thereby generating almost 47,000 BTU/hr.
A large cluster requires a high-density cooling system, and the installation of a cluster into a
computer room containing existing systems might have a significant impact on cooling
requirements. HP Data Center Services provides consultation to assist you in developing an
efficient high-density cooling strategy by using dynamic modeling. Contact your HP sales
representative for more information.
A complete discussion of cooling requirements is beyond the scope of this guide. For more
information, read the Technology Brief TC030203TB Power and Cooling Trends in the Datacenter
available at the following location:
and also Best Practices for HP 10000 Series and HP 10000 G2 Series Racks, available at the following
location:
http://h20000.www2.hp.com/bc/docs/support/SupportManual/c00637362/c00637362.pdf
To estimate computer-room cooling requirements, you first need to calculate the amount of
energy used by the cluster. HP provides online power-consumption calculators that enable you
to configure a virtual rack and determine its power consumption. For example:
http://h18001.www1.hp.com/partners/microsoft/utilities/power.html
For other models, you will need to obtain the power consumption data from a component's
specifications. The installation guide for any HP Cluster Platform contains the specifications for
all components used in a particular cluster model. Photocopy the following worksheet and use
it to calculate power consumption and heat load:
Table 1-9 Cluster Power Consumption Calculation Worksheet (per Cluster Building Block)
Component
Server (application node)
Server (control/utility node)
Network Switch (variant A)
Network Switch (variant B)
Interconnect Chassis
Interconnect cards (variant A)
Interconnect cards (variant B)
Interconnect cards (variant C)
Interconnect option A
Interconnect option B
Disk Storage Shelf
KVM Console
Other rack options/requirements
Option A
Option B
Total Power
http://techcomm.cca.cpqcorp.net/whitepapers/tc030203tb.pdf
Quantity Watts
1 98
BTUs Total
334
1.5 Physical Layout Requirements 25