1. Technical Operations Manager, Energy - Digital Realty
Building Performance
Planning, Barriers, Solutions for Data Center Energy Efficiency Project Development
Planning, Barriers, Solutions for Data Center Energy Efficiency Project Development
John R. Dumler P.E. , C.E.M.
Technical Operations Manager, Energy - Digital Realty
August 12, 2015

2. Table of Contents Digital Realty Company Overview
Better Buildings Data Center Challenge
Energy Projects - Planning, Barriers, Solutions
Example – Life Cycle Cost Analysis

3. Digital Realty Overview
World’s largest Data Center REIT
One of the 20 largest publically traded U.S. REIT’s
Equity market cap ~ $9 Billion
Diversified portfolio of properties and tenants, located in over 30 markets throughout North America, Europe, Asia and Australia(3)
131 properties
250+ suites (many totally discrete)
24.6 million rentable square feet
Recently agreed to acquire Telx
Enhanced interconnectivity & Colo offering

4. Digital Realty Overview
ENTERPRISE
COLOCATION & CLOUD,
MSPS AND SYSTEMS INTEGRATORS
NETWORK PROVIDERS

5. Digital Realty Overview
By 2020 U.S. data centers are projected to consume about 140 billion kilowatt-hours of electricity, an amount of energy equivalent to the output of 50 large coal-fired power plants. If all U.S. data centers were 20% more efficient, as a nation we could save more than 20 billion kWh by That translates to roughly $2 billion in cost savings.

6. Digital Realty Overview
Sustainability Initiatives
Clean Energy
Green bond
Providing clients clean energy for 12 months at no incremental cost over the cost of traditional non- renewable energy.
Reduces carbon footprint of client data centers
$500 million for “Eligible Green Projects”
LEED Data Centers
Energy Efficiency Upgrades
Water conservation efforts
Provisions for lifecycle thinking
Global scope

7. Better Buildings Challenge
How is Digital involved?
Digital has publically committed to reduce our “non-IT energy intensity”, within a 20MW sub-portfolio of properties, by 20% over 10 years.
Digital is one of (20) initial program participants.
(13) Public and Federal Data Centers + (7) Private Data Centers
Total initial program pledge = 90MW
DLR is approx. 22% of total initial commitment.
Energy Performance: (22% of goal)
Cumulative (vs. Baseline)
4.4%
Annual (2014)

8. Energy Management Program Overview – Process (ISO 50,001)
Plan: Conduct the energy review and establish the baseline, key performance indicators (KPI’s), objectives, targets and action plans necessary to deliver results that will improve energy performance in accordance with the customer’s and/or organization's objectives.
Do: Implement the energy management action plan(s).
Check: Monitor and measure processes and the key characteristics of operations that determine energy performance against the energy objectives, and report the results.
Act: Take actions to continually improve energy performance and the overall Energy Management Program.

9. Energy Management Planning
Low/no cost ECO’s – Air and tile management, raising set points, etc.
Assess risk
Capital Projects with attractive ECO potential
Financial modeling for both ROI and IRR.
Attractive utility rebate and incentive availability
Customer engagement/interest and support
Current or planned connectivity with Digital’s DCIM tool: Envision
Cross function buy-in; Customer/IT, Asset Management, Technical Operations, Property Management, Legal, etc.

10. Energy Management Barriers
Utility pass-through
Most of Digital’s customers pay 100% of their utility consumption
Why Invest in energy upgrades if Digital doesn’t see a benefit?
Support customers with in-house energy expertise (whose core business is IT/compute and not data center facilities)
Varying financial models for energy conservation opportunities
Light speed growth
Some customers literally can’t grow fast enough. Energy takes a back seat to growth (and reliability).
SLA’s
Legacy SLA’s (ASHRAE 2008 Recommended)
Narrow temperature and humidity bands – not much wiggle room. Needs to change to facilitate improved efficiency.
Resource availability and prioritization – i.e. lack of manpower.
Cultural Challenges
High awareness, Low implementation
“I understand the idea and potential benefits of Energy Management, but….”
Raising temps reduces thermal ride through and increases risk. (True? How is this assessed?)
Newer IT equipment specs, ASHRAE X-factor, temperature excursions, current air management, etc
Who pays for it?

11. Energy Management Solutions
You can’t manage what you don’t measure……i.e. Data…..more is better
Gather accurate baseline energy consumption data
Understand how and where data is taken and recorded
Instantaneous monthly kW values
Dedicated vs. Shared infrastructure
i.e. accounting for chiller plant energy consumption
Re-align legacy designs to accommodate customer IT deployments
Average UPS utilization is approx. 35%
Tuning Data Center Mechanical Infrastructure to more closely match IT loads.
SLA amendments
Moving from 2008 recommended to 2011 recommended and allowable (and beyond).
Educate, empower and reward individuals
Accountability
Culture
Evaluate opportunities and limitations as they relate to business and customer needs.
Identify, Analyze, Prioritize, Implement (Practically)

12. Energy Management Solutions

13. Energy Management Example / Case Study

14. Energy Management Example / Case Study
Data Center has (8) 50 Ton N+1 = 1230KW Capacity (~350 Tons)
IT load was 542kW (~154 Tons)
Site requested additional CRAH units because they couldn’t maintain rack inlet temps with 65°F Supply Temp.
Site was trying to address hot-spots by deploying high density directional tiles w/o dampers.
Findings
Backwards switches
No blanking panels
Improper tile deployment.
Too many high density tiles were inadvertently lowering the under floor pressure which was compounding issues.
Air volume ~ 232 CFM/kW
@100% fan, max cooling = 724 kW (~200 Tons)
Stranded Cooling: 506kW (~140 Tons)
Fixes
Customer modified switches and added blanking panels
Dampers were added to high density tiles and tiles were balanced to Rack IT loads with an under floor pressure of approx. 0.05”
Results –
Fan Savings - With better tile management, under floor pressures rose which caused the CRAH fans to slow down, resulted in $7,000 annual savings
Free ’d a large portion of Stranded Cooling Capacity
Avoided purchasing and installing new CRAH’s

15. Energy Management Example
SLA
All temps are within SLA’s (ASHRAE 2008 TC9.9 recommended ranges)
Racks 3 & 10 appears to be a “hot spot”. Why?
On average, CRAH/C Return temp set points are between 68°F and 72°F
Goal: Get all readings closer to the red band, then increase CRAC/H set points

16. John R. Dumler, P.E., C.E.M., LEEP AP
Technical Operations Manager, Energy M:
375 Riverside Pkwy, Suite 109 Atlanta, GA