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Creating the most realistic test environment
What type of test are you conducting?
If you are planning to do a power test only, it may be appropriate to use large capacity floor standing heat load units. The same units could be used for testing the cooling at a room level. The advantage of using fewer units requires less cabling, less set-up time and are quicker to power on/off fewer units. A more accurate cooling test would require smaller, preferably rack mounted emulators mounted in the racks. By distributing the load in smaller capacities you can more accurately simulate the location of the computer equipment within the racks and across the room. Rack mounted emulators have a Delta-T close to that of computer equipment.
What power distribution is available at the time of testing?
Heat Load can be split into two groups; single or 3-Phase powered. It is important to identify how the power is terminated within the room. If commando sockets are available the load can simply be plugged in using the lead provided with the heat load. If the power distribution is not fully implemented it may be necessary to hardwire temporary leads into the power distribution or to install temporary power distribution boards
If the customer racks are installed, including power strips it is recommended that the rack mounted server emulators are connected to the power strips (as this fully tests the power system from the incoming supply through to the power outlet on the power strip). If the power strips are not implemented or the customer does not want the load to be connected to the strips. It may be necessary to provide temporary power strips. Are there sufficient power outlets in terms of capacity and quantity in the locations where the heat load is required?
During testing what level will the room be fitted out to?
Will the racks be installed or will the computer equipment be floor standing? It is advisable to install temporary racks to more accurately replicate the final layout. If the racks are already installed it is advisable to install temporary blanking to prevent air recirculation. If the design includes hot aisle or cold aisle containment, will it be implemented before test period? If not it is advisable to build temporary containment to provide separation between aisles. If it is implemented, it may be necessary to modify it to accommodate the heat load.
