Multicell Power Supplies for Improved Energy Efficiency in the Information and Communications Technology Infrastructures

Michael Chrysostomou, Nicholas Christofides, Stelios Ioannou and Alexis Polycarpou
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Michael Chrysostomou: Department of Electrical Engineering, Computer Engineering and Informatics, Frederick University, Limassol 3080, Cyprus
Nicholas Christofides: Department of Electrical Engineering, Computer Engineering and Informatics, Frederick University, Limassol 3080, Cyprus
Stelios Ioannou: Department of Electrical and Electronic Engineering, University of Central Lancashire, Preston PR1 2HE, UK
Alexis Polycarpou: Department of Electrical Engineering, Computer Engineering and Informatics, Frederick University, Limassol 3080, Cyprus

Energies, 2021, vol. 14, issue 21, 1-18

Abstract: The rapid growth of the Information and Communications Technology (ICT) sector requires additional infrastructure, such as more micro-datacenters and telecom stations, to support the higher internet speeds and low latency requirements of 5G networks. The increased power requirements of the new ICT technologies necessitate the proposal of new power supplies, in an attempt to support the increase in energy demand and running costs. This work provides an in-depth theoretical analysis on the losses of the individual stages of commercially available PSU and proposes a new multicell PSU, the buck PFC converter, which offers a higher overall efficiency at varying load levels. The theoretical results are verified using simulation results, via a PSIM Thermal Module, and using experimental data. The results indicate that multicell structures can improve the overall PSU efficiency by 1.2% at 50% rated power and more than 2.1% at full power. Finally, taking into consideration the economic implications of this study, it is shown that the proposed multicell structure may increase the PSU costs by 10.78%, but the payback period is in the order of just 3.3 years.

Keywords: micro-datacenters; Information and Communications Technology (ICT); efficiency; multicell; power supply unit (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
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