# What is PUE / DCiE?

♦What is PUE / DCiE?

Power Usage Effectiveness (PUE) and its reciprocal Data Center infrastructure Efficiency (DCiE) are widely accepted benchmarking standards proposed by the Green Grid to help IT Professionals determine how energy efficient data centers are, and to monitor the impact of their efficiency efforts.\
♦How to Determine PUE ?

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1- Take a measurement of energy use at or near the facility’s utility meter. If the data center is in a mixed-use facility or office building, take a measurement only at the meter that is powering the data center. If it is not on a separate utility meter, estimate the amount of power being consumed by the non-data center portion of the building and remove it from the equation.\
2-Measure the IT equipment loads after power conversion, switching, and conditioning is completed. According to The Green Grid, the most useful measurement point is at the output of the computer room power distribution units (PDUs). This measurement should represent the total power delivered to the server racks in the data center.

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♦PUE = Total Facility Power / IT Equipment Power\
♦PUE Example:\
Having a facility that uses 100,000 kW of total power of which 82,000 kW is used to power your IT equipment, would generate a PUE of 1.2.\
The 100,000 kW of total facility power divided by the 82,000 kW of IT power.\
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♦How to Determine DCiE ?\
DCIE is the reciprocal of Power Usage Efficiency (PUE). PUE is defined as the total facility power divided by the IT equipment power. That means that ♦DCiE = 1/PUE \*100.\
♦An example that will help you understand how to work out your data center energy efficiency:\
Total Facility Power = 100 kW\
IT Equipment Power = 82 kW\
DCIE = 82/100 x 100% = 82%\
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PUE DCiE Level of Efficiency\
3.0 33% Very Inefficient\
2.5 40% Inefficient\
2.0 50% Average\
1.5 67% Efficient\
1.2 83% Very Efficient\
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♦How to reduce PUE?\
♦Cold Aisle Containment - Cold aisle containment counts as the largest contributor to the PUE improvement in combination with by-pass air flow avoidance (blanking plates, by-pass air etc.)\
♦Enhanced cooling technology - Much of a data center’s energy is spent on cooling IT equipment. Whether it’s through enhanced airflow management, advanced cooling systems, or better layout, improving the cooling system can save a great deal of energy.

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♦Make small improvements - Modest improvements add up. Using advanced power supplies, automatic lighting, and removing waste ensures that the whole facility contributes to a lower PUE.\
♦Measure regularly - A Data center should measure its PUE regularly. Not only does this show when there is an issue, but it also provides a record of efforts and successes.\
♦Why it’s important to reduce PUE?

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PUE and DCiE demonstrate how efficiently a data center uses energy. By understanding the amount of energy spent on different processes, companies can assess how to save money, improve service, and reduce waste.



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Định nghĩa PUE và DCiE

Power Usage Effectiveness (PUE) và Data Center Infrastructure Efficiency (DCiE) là các tiêu chuẩn đánh giá hiệu suất năng lượng trong trung tâm dữ liệu, được đề xuất bởi Green Grid.

Cách tính PUE

1. Đo công suất tại đồng hồ tiện ích hoặc gần đó.
2. Đo công suất thiết bị IT sau khi chuyển đổi, chuyển mạch và điều hòa điện. Công thức: PUE = Công suất tổng / Công suất thiết bị IT

Ví dụ PUE

* Công suất tổng: 100.000 kW
* Công suất thiết bị IT: 82.000 kW PUE = 1,2

Cách tính DCiE

DCiE là nghịch đảo của PUE. Công thức: DCiE = 1/PUE \* 100

Ví dụ DCiE

* Công suất tổng: 100 kW
* Công suất thiết bị IT: 82 kW DCiE = 82%

Cấp độ hiệu suất DCiE

* 3,0: 33% (Không hiệu quả)
* 2,5: 40% (Không hiệu quả)
* 2,0: 50% (Trung bình)
* 1,5: 67% (Hiệu quả)
* 1,2: 83% (Rất hiệu quả)

Cách giảm PUE

1. Containment Cold Aisle: Tối ưu hóa luồng khí lạnh.
2. Công nghệ làm mát tiên tiến: Cải thiện hệ thống làm mát.
3. Cải thiện nhỏ: Sử dụng nguồn điện tiên tiến, ánh sáng tự động.
4. Đo đạc thường xuyên: Theo dõi PUE thường xuyên.

Tầm quan trọng của việc giảm PUE

PUE và DCiE giúp đánh giá hiệu suất năng lượng trong trung tâm dữ liệu. Giảm PUE giúp tiết kiệm chi phí, cải thiện dịch vụ và giảm lãng phí.

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[hashtag#DCDC](https://www.linkedin.com/feed/hashtag/?keywords=dcdc\&highlightedUpdateUrns=urn%3Ali%3Aactivity%3A7268716818649731073) Knowledge.

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