Currently we are working on the power calculation and the heat dissipation by the Data Center Switches. Rather looking at each individual catalog, I figured out Cisco Systems are offering a dynamic tool which helps to calculate the total power required, typical output power, total heal dissipation.
The tool is known as Cisco Power Calculator (CCO login required):/
This utility asks you the type of switch you are using, what kinds of modules you are using, type of supervisor engine etc. After providing all the details the utility provided you a in depth report and you can download the same in an excel sheet or in pdf format. I am attaching the sample report which I calculated for one of our Cisco Catalyst 6513 Switch.powercalc_catalyst_6500_09-27-2011