DC Power Distribution Architecture for Data Center Efficiency
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Solution Overview
Problem
Data centers face significant challenges in maintaining 24/7 operations, managing physical space, cooling requirements, and power consumption, primarily due to inefficient AC power systems that convert power with low efficiency and generate excessive heat.
Innovation Solution
A DC-based power distribution architecture is introduced, comprising stages for delivering AC power to nodes, converting it to DC using rectifier/charger units, stepping down the voltage with DC/DC converters, and providing a dual path power distribution system powered by both stepped-down DC voltages, which powers critical loads with improved efficiency and thermal management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If AC power is used to power servers and equipment, then power distribution is simple and compatible with utility lines, but power efficiency is low (70%) and significant energy is wasted
Solution Approach 1:
The patent changes the fundamental parameter of power distribution from AC to DC voltage levels. By distributing multiple DC voltage levels (e.g., 48V, 24V, 12V, 5V) throughout the data center infrastructure, the system eliminates the need for AC-to-DC conversion at each server, thereby improving power efficiency and reducing energy waste associated with traditional AC power distribution
2Temperature
If AC power supplies are used, then power distribution infrastructure is established, but significant heat is generated that must be dealt with
Solution Approach 1:
By transitioning from AC to DC power distribution at multiple voltage levels, the patent eliminates the inefficiencies of AC-to-DC conversion at server level. This parameter change reduces the thermal load generated by power conversion equipment, as DC-DC conversion and direct DC distribution are more efficient and generate less heat than repeated AC-to-DC conversions
3Use of energy by stationary object
If traditional AC power distribution is used, then existing infrastructure is utilized, but power consumption accounts for up to 50% of total operating costs
Solution Approach 1:
The patent implements a multi-level DC voltage distribution system that replaces traditional AC power distribution infrastructure. By establishing DC power rails at various voltage levels throughout the data center, the system reduces power consumption and associated costs while managing the complexity through standardized DC distribution architectures
Solution Approach 2:
The power distribution system is segmented into multiple DC voltage levels (48V, 24V, 12V, 5V), with each level serving specific purposes and equipment types. This segmentation allows for optimized power delivery to different components based on their voltage requirements, improving overall system efficiency while organizing the complexity into manageable layers
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution achieves 93% efficiency in power usage, reduces thermal loads by 20-40%, increases server reliability by 27%, and decreases monthly power costs by up to 30% compared to traditional AC power supplies.
Implementation Method 1
a first set of rectifier/charger (RC) units coupled to the first node that converts AC power to DC power
Implementation Method 2
a first set of DC/DC converters that steps down the DC power from the first distributed bus bar to a first stepped down DC voltage
Data Source
AI summary
A DC-based power system including: an AC power distribution system for providing AC power to a first node and a second node; a first converting system coupled to the first node that converts AC power to DC power and outputs the DC power to a first distributed bus bar; a second converting system coupled to the second node that converts AC power to DC power and outputs the DC power to a second distributed bus bar; a first set of DC/DC converters that steps down the DC power from the first distributed bus bar to a first stepped down DC voltage; a second set of DC/DC converters that steps down the DC power from the second distributed bus bar to a second stepped down DC voltage; and a critical load distribution system that is powered by both the first stepped down DC voltage and the second stepped down DC voltage.