pg e and altera
Download
Skip this Video
Download Presentation
PG&E and Altera

Loading in 2 Seconds...

play fullscreen
1 / 19

PG&E and Altera - PowerPoint PPT Presentation


  • 110 Views
  • Uploaded on

PG&E and Altera. Data Center Energy Efficiency Project. PG&E and Altera: A History of Energy Efficiency. After hours cooling project Chiller VFD retrofit CDA compressor replaced with VFD CDA compressor Data Center Efficiency Project. PG&E and Altera: A History of Energy Efficiency.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'PG&E and Altera' - andra


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
pg e and altera

PG&E and Altera

Data Center

Energy Efficiency Project

pg e and altera a history of energy efficiency
PG&E and Altera: A History of Energy Efficiency
  • After hours cooling project
  • Chiller VFD retrofit
  • CDA compressor replaced with VFD CDA compressor
  • Data Center Efficiency Project
pg e and altera a history of energy efficiency1
PG&E and Altera: A History of Energy Efficiency

VFD CDA

Compressor Retrofit

After Hours

Cooling Project

Chiller VFD Retrofit

Project Cost: $110k

ROI: 3 years

PG&E Rebate: $15k

Annual Savings: $32k

Project Cost: $78k

ROI: 1.1 years

PG&E Rebate: $36k

Annual Savings: $39k

Project Cost: $139k

ROI: 3.8 years

PG&E Rebate: $31k Annual Savings: $29k

altera data center energy efficiency project objectives
Altera Data Center Energy Efficiency Project Objectives
  • Keep servers between 68° and 77° F (ASHRAE)
  • Reduce energy use
  • Accommodate server growth
  • Increase server and data center reliability
two interests meet
Two Interests Meet
  • Altera had a temporary cooling unit in place to serve a ‘hot spot’ and was looking at ways to handle planned load increases.
  • In PG&E’s territory, improving data center energy efficiency by 15% would save 100 GWh of electricity – the equivalent of powering 15,000 homes for a year or taking almost 8,000 cars off the road.
why is airflow a problem in data centers
Why is Airflow a Problem in Data Centers?
  • Wasted energy
  • Wasted money
  • Less capacity
  • Less reliability
why do these problems exist
Why Do These Problems Exist?

In a typical data center…

  • Only 40% of AC air is used to cool servers

Robert 'Dr. Bob' Sullivan, Ph.D. Uptime Institute

  • HVAC systems are 2.6 times what is actually needed

Robert 'Dr. Bob' Sullivan, Ph.D. Uptime Institute

  • Not a big concern when power density was low but it continues to grow (about 150w/sqft)
  • The culprit: allowing hot and cold air to mix
first step assess current situation
First Step: Assess Current Situation
  • Data loggers placed in the inlet and discharge air streams of each cooling unit.
  • Four loggers placed in each cold aisle.
  • Current transformers installed on the electrical distribution circuits feeding the two roof-top condensing units.
  • Total rack kW load was recorded to establish baseline.
findings
Findings
  • Temperature across cooling units ranged from 12° to 18°F.
  • Temperature variance of up to 14° degrees from one server to another.
  • Approximately 45 kW could be saved in theory if air flow was ideal
second step implement ideas from meeting with pg e
Second Step: Implement Ideas from Meeting with PG&E
  • ALL servers must be in hot/cold aisles (HACA)
  • Blanking plates between servers
  • Strip curtains at ends of aisles
  • Remove perforated tiles from hot aisles
  • Partitions above racks
third step altera adopts changes
Third Step: Altera Adopts Changes
  • APC in-row coolers installed
  • Temporary cooling unit removed
  • Blanking plates added
  • Installed strip curtains to separate the computing racks from the telecom area
  • Shutting off CRAC unit
final measurement and review
Final Measurement and Review
  • Even after Altera made all of these changes, excess cooling capacity still existed.
  • PG&E recommended shutting down a second CRAC unit, thus putting all primary cooling on chilled water units.
altera s new and improved data center
Altera’s New and Improved Data Center
  • Temporary mobile cooling unit gone
  • Two CRAC units shut off
  • Server temperature variance a mere 2° F
  • Net electricity reduction of 44.9 kW
  • Annual energy savings of 392.9 MWh
  • Overall energy savings: 25%
moral of the story
Moral of the Story?
  • Improving airflow is a safe and sensible strategy to simultaneously make data centers greener, more reliable, higher capacity, and more economical to operate.
  • To achieve results such as Altera’s, it takes teamwork between IT, Facilities, HVAC experts, and PG&E.
ad