Phoenix Convention Center Phoenix, Arizona District or Distributed Integrated EnergyDistrict Heating and Cooling Robert McMillin Siemens Industry, Inc. August 12, 2015

Energy Exchange : Federal Sustainability for the Next Decade Introduction Master Planning New Construction – Best time to choose a direction 2 – Likely higher first cost, but lower future cost Retrofit – Expensive – Adding to plants serving functional clusters – Diversity of building types

Energy Exchange : Federal Sustainability for the Next Decade Qualification Identify what you do and where you do it Prioritize your goals 3 Understand your capabilities and resources

Energy Exchange : Federal Sustainability for the Next Decade Identify what you do and where you do it Sometimes the decision is made for you – McAlester Army Ammunition Plant – USDA Field Office – GSA facilities in downtown San Antonio 4

Energy Exchange : Federal Sustainability for the Next Decade Prioritize your goals Cost Risk/Reliability Energy Security Environmental Energy reductions Aesthetics 5

Energy Exchange : Federal Sustainability for the Next Decade Prioritize you Goals – Cost Installation Costs Utility Costs Operations & Maintenance Cost – Fewer and more hardy equipment in plants – Fewer but higher qualified personnel in plants – Consolidation of maintenance costs and activities Replacement Cost – Longer lives and less pieces in plants – Emergency/ongoing replacements in distributed 6

Energy Exchange : Federal Sustainability for the Next Decade Prioritize you Goals – Risk/Reliability & Energy Security Redundancy – n+1 for district, n+# of bldgs for distributed Piping vs Equipment Combined Heat and Power 7

Energy Exchange : Federal Sustainability for the Next Decade Prioritize you Goals – Energy Reductions/Environmental Transmission losses Steam vs hot water Central equipment vs unitary equipment Water cooled vs air cooled Water usage and water treatment ESPC 8

Energy Exchange : Federal Sustainability for the Next Decade Prioritize you Goals – Aesthetics Central plants and storage are not necessarily the most beautiful facilities Space requirements may dictate long transmission systems and overhead lines are not “pretty” Noise Quality of Life 9

Energy Exchange : Federal Sustainability for the Next Decade Understand your Capabilities and Resources Labor Pool Available utilities and fuels Available rates 10

Energy Exchange : Federal Sustainability for the Next Decade Benefits of Distributed Systems 11 Lower first installation costs Total facility shutdown Less stringent labor force requirements Severability – Potentially more attractive as a resale property – The loss of one facility, the plant, does not shut down the campus

Energy Exchange : Federal Sustainability for the Next Decade Improve existing systems Controls Re-commissioning/Retrocommissioning Cooling – Temperature resets – Plant optimization programs – Equipment efficiency improvements Heating – Temperature and pressure reset – Plant optimization routines – Equipment efficiency improvements Variable pumping and fan speed 12

Energy Exchange : Federal Sustainability for the Next Decade Conclusions Multiple facilities/campus environment Accurately compare all costs and benefits when evaluating options Improve plant efficiency regardless of district or distributed if financially viable. Consider transferring risk to a third party 13

Phoenix Convention Center Phoenix, Arizona Contact Information Integrated EnergyDistrict Heating and Cooling Robert McMillin Siemens Industry, Inc