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 jdumler@digitalrealty.com

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

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

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

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 2020. That translates to roughly $2 billion in cost savings.

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

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)

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.

Energy Management Planning Low/no cost ECO’s – Air and tile management, raising set points, etc. Assess risk 2016-2020 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.

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?

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)

Energy Management Solutions

Energy Management Example / Case Study

Energy Management Example / Case Study Data Center has (8) 50 Ton CRAH’s @ 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

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

John R. Dumler, P.E., C.E.M., LEEP AP Technical Operations Manager, Energy M: 770.653.6911 jdumler@digitalrealty.com 375 Riverside Pkwy, Suite 109 Atlanta, GA 30122 www.digitalrealty.com