IT HAS BEEN THE MECHANICAL COOLING SYSTEMS THAT HAVE ATTRACTED THE MOST ATTENTION REGARDING THE ENERGY OVERHEADS REDUCTION . support the load while still maintaining the required level of active redundancy . This also means a reduction in energy use and subsequent less cooling in some situations .
UNCOVERING THE LAYERS
IT HAS BEEN THE MECHANICAL COOLING SYSTEMS THAT HAVE ATTRACTED THE MOST ATTENTION REGARDING THE ENERGY OVERHEADS REDUCTION . support the load while still maintaining the required level of active redundancy . This also means a reduction in energy use and subsequent less cooling in some situations .
Expansion of capacity is a matter of adding a further module and contraction is a simple matter of turning off modules , reducing the need for systems to be always on , powered to the max , 100 % of the time . The aim is to allow the UPS to be loaded to 30 – 60 % at any given load – where the UPS will be able to provide its highest efficiency rating .
The ability to continuously ‘ right-size ’ the UPS capacity to the load lets users minimise their power and cooling requirements , which consequently reduces power usage over the life of the UPS .
Also , when we look at the load / efficiency curves for modern , modular systems we can see they are not entirely flat but instead produce slightly higher efficiency at partial loads . This is because UPS manufacturers recognise that modular systems are typically operated in ‘ redundant mode ’, so no single module will be fully loaded . For example , in an N + 1 system comprising two modules in parallel and sharing the load equally , neither will ever have more than 50 % loading .
Moving to newer UPS solutions over a legacy framework can offer a significant reduction in PUE as well as a more costeffective ROI . But planning , research and choosing the right supplier are key to obtaining energy efficiency and critical power backup with no compromise on reliability . �
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