Optimum sizing and configuration of electrical system for
The proposed optimum hybrid electrical system is designed to minimize total capital and operational costs while achieving 100% power availability for telecommunication
This is when the PSU is no longer powering the PA, which is the main power draw, but still needs to power other electronics. The current target for low-load efficiency is about 30 W. Some OEMs would like to see that drop to nearly 10 W.
With the adoption of scalable “pay as you grow” uninterruptible power supply (UPS) architec-tures, it's becoming easier to install these systems. It allows the data center manager to simply add modules as the needs of the data center grow.
This breakdown assumes 5,000 ft2, (465 m2) data center with an initial steady state critical load of 50 kW, plus a future steady state load of 50 kW. The cooling system is assumed to be direct expansion (DX) and the utility voltage is 480 volts AC.
However, the electrical service and the generator power sources that provide power to the data center cannot be sized to the steady state values. These sources must be sized to the peak power consumption of the loads, plus any derating or oversizing margins required by code or standard engineering practice.
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