The Road to Zero: State Zero Net Energy Buildings Green California Summit Sacramento, CA April 26, 2017
Agenda 1. State Zero Net Energy Mandates 2. Definition of ZNE 3. ZNE for New Construction 4. ZNE for Existing State Buildings 5. CDPH ZNE Case Study
State of California ZNE Mandate Executive Order B-18-12 1. New state buildings and major renovations shall be Zero Net Energy 50% of buildings beginning design after 2020 100% of buildings beginning design after 2025 Exceed CA T-24 by at least 15% 2. 50% of square footage of existing state building area ZNE by 2025 Includes all forms of energy Excludes electric vehicle charging
State-Owned Facilities 35 Executive Branch state agencies manage buildings >1,700 facilities, 112 million sq. ft., >20,000 structures 9.7 Billion kbtu energy use 267 Million kbtu onsite renewable energy (~3%) CDCR, 44% DGS, 15% DOT, 7% DSH, 6% DPR, 6% DDS, 3% CMD, 3% CDVA, 2% ALL OTHERS, 13%
State Building ZNE Challenge: How do we get 56 M sq. feet of occupied state buildings to ZNE by 2025? (w/ no funding)
Defining Zero Net Energy for State Bldgs. SITE SOURCE EMISSIONS TDV COST
Defining Zero Net Energy for State Bldgs. ZNE Source: Energy efficient facility that produces as much renewable energy as it consumes over the course of a year, when accounted for at the energy generation source. Aligns with DOE definition A Common Definition for Zero Energy Buildings, September 2015, U.S. Department of Energy National uniformity Saves state $1.8B over next eight years Does not include EV charging
Strategies for ZNE at State Buildings ZNE Source Energy efficient facility that produces as much renewable energy as it consumes over the course of a year, when accounted for at the energy generation source. 1. Energy Efficiency Include all energy sources 2. Renewable Energy Generation a. Onsite to extent possible - then b. Campus c. Portfolio d. Community National Average Source Energy Conversion Factors Form of Energy Imported Electricity 3.15 Exported Renewable Electricity 3.15 Natural Gas 1.09 Fuel Oil (1,2,4,5,6,Diesel, Kerosene) 1.19 Propane & Liquid Propane 1.15 Steam 1.45 Hot Water 1.35 Chilled Water 1.04
Energy Efficiency for New Construction Exceed California T-24 by 15% minimum Strategies often include: Optimize building orientation Daylighting Well-insulated building envelope Ultra-efficient lighting and HVAC systems & controls Reduce plug loads
Energy Efficiency in ZNE Pays Back CALottery Santa Fe Springs District Office 155 kbtu/sq. ft. Source EUI 65 kbtu/sq. ft. Source EUI
ZNE for Existing Buildings State Existing Building Portfolio ~110 Million Square Feet Energy Efficiency Targets Energy Use Intensity Targets (Source EUI) Top 25% Energy Use Targets Based on 2015 State Energy Use Data Over 1,500 state facilities Variations for 16 Climate Zones
State Building Types & Occupancies Energy Efficiency First Adult Education - CCC Energy Use Intensity Targets (Source EUI) Top 25% Based on 2015 state energy use data College/University Data Center Fire Station - CALFIRE K-12 School 34 State Building Types & Various Occupancies Laboratory Library Variations for 16 (CALFIRE) Climate Zones Mixed Use Property Multi-family Housing Office - Average All Other - CalTrans Other - Education Types maintenance Office - Large Other - Entertainment Other - Caltrans TMC >50K sq. ft. public Office - Small <50K Other - Other - CDFA sq. ft. - CHP Lodging/Residential Office - Small <50K Other - CDFW ecolog. Other - Specialty sq. ft. - CMD reserve Hospital (DSH) Office - Small <50K Other - CDFW fish Outpatient sq. ft. - DMV hatchery Rehab/Phys - (DSH) Office - Small <50K Other - CDFW wildlife Prison/Incarceration - sq. ft. - EDD area CDCR Office - Other Other - DPR park Residence Hall/dorm - Small <50K sq. ft. structures CALFIRE Non-Refrigerated Other - DWR maint. & Senior Care Facility Warehouse subctr. CalVet Other - HCD migrant Green California Summit centers April 26, 2017
Energy Efficiency Targets for Existing State Buildings (Source EUI)
Improving Building Energy Efficiency Energy Efficiency Retrofits Electrical Systems (lighting/power) Mechanical systems Building Envelope Water Systems Alternative Financing Options State Agencies: o o DGS energy revolving fund GS $Mart Loans Utilities: o On-bill financing, Incentives Energy Service Companies (ESCo s) CHP Academy, West Sacramento
Renewable Energy Generation Priority 1. On-site Generation 2. Campus DMV Fresno Field Office First State ZNE Building
Renewable Energy Generation Priority 2. Campus
Renewable Energy Generation Priority 3. Portfolio
Renewable Energy Generation Priority 4. Community
Renewable Energy Procurement Power Purchase Agreements (PPA) State has 40 MW installed statewide DGS working toward 100 MW by end of 2020 Onsite Renewable Energy Purchases Community Solar Purchase Dedicated renewable energy purchase 20 year min. agreement Retain/retire REC s
Upcoming ZNE Management Memo Establishes State Policy for ZNE Determines ZNE Energy Efficiency Targets for Existing Buildings Places Policy in State Administrative Manual (SAM) Includes Tools and Resources Stay Tuned to http://sam.dgs.ca.gov/toc/1800.aspx
California Department of Public Health Presenter: Gary Gascoigne Chief Facilities Management Section
Zero Net Energy Facility Site California Department of Public Health Office Building P, is a 205,153 sf three story office building, located in Richmond. This office building is one of 11 buildings on this 30 acre site. The property includes over 1,000 surface level parking spaces. Built and commissioned in 2005 LEED EB Silver certified in 2011 2016 Energy Star certified with score of 99
Richmond Campus Energy Load Breakdown for Building P Stantec Consultants performed an analysis on energy consumption of Building P In 2015, Building P consumed 2,710,520 kbtu (Source) of energy (1,432,411 kwh plus 17,724 Therms) Source EUI = 84 kbtu/sq. ft. Below top quartile target of 98 for large CA state office buildings in climate Zone 3 Energy reductions were identified by Stantec and CDPH as a result of the study performed
2015 Building P Energy Use Breakdown Ventilation Fans 9% Pumps & Aux. 2% Space Cooling 5% Space Heating 29% Domestic Hot Water 5% Mechanical / HVAC 50% Lights 26% Plug Loads (Misc. Equip.) 24%
Lighting 26% of total energy use Linear LED Pilot Project Replaced 228 existing linear fluorescent with LED daylight/occupancy computer controlled fixtures Saved 23,475 kwh/yr. Direct Plug-in LED Light Tubes Project Replaced 4074 existing 32W fluorescent tubes with 17W direct plug-in LED tubes Saved 190,662 kwh/yr. Pendant Light Retrofit Project Retrofit existing 494 fixtures containing CFL lamps and replaced with low wattage LED lamps Saved 43,319 kwh/yr.
Rebates through the Utility Company PG&E Available Resources California Conservation Corps. Ballast change out on CAN light retrofit LED light installation
Miscellaneous Equipment A large part of the 24% of total energy use is attributed to IT Operations Desktop Computer Power Saving Software Installed a power saving system called Verdiem software at 700 desktop computers in Building P Server Room UPS Load Evaluations Existing UPS were individual by rack and oversized Designed a centralized UPS to be more efficient to meet the need of the actual load required Utilized some virtual desktop interface (VDI) Printer/Copier Policies Reduce personal printers Network printers within reasonable distance of staff Printers and copiers to be energy star Replaced some existing 14w task lights to 7w LED task lights
Chiller Replacement Mechanical 50% of total energy use Johnson Controls Centrifugal Magnetic Bearing Chiller Operates more efficiently at reduced loads Installed variable frequency drives on ventilation fans, and pumps Changed out existing heating hot water boilers and domestic hot water boilers with high efficiency boilers to reduce gas consumption
Solar Panel Project CDPH worked through DGS to provide a Power Purchase Agreement (PPA) to install 9500 solar photovoltaic panels throughout the Richmond Campus parking lot. Installation completed at the end of 2016 Fixed rate of 9.7 cents per kilowatt for the next 20 years
Surface Parking Lots Some taller trees may have to be sacrificed in existing parking lots due to shading the panels Shorter trees can be saved or be put back in later Name Title
Completed Solar Arrays Where Trees Were Removed
There are 23 separate canopy structures and connect to the electrical infrastructure in four different locations
Parking Lot or Roof Space Optimal To achieve ZNE using only your site you need enough space for solar panels to offset all energy utilized on site High rise, vertically structured buildings with subterranean parking cannot usually achieve ZNE only using their site Horizontally structured buildings with limited rooftop equipment and surface level parking are good candidates for ZNE
Example of Good Facility Site for ZNE
Example of Good Facility Site for ZNE
Example of Challenging Site for ZNE
CDPH Richmond Campus Solar Project https://www.youtube.com/watch?v=t3irm--ae84&feature=youtu.be
Questions & Contact Info Dan Burgoyne Department of General Services Daniel.Burgoyne@dgs.ca.gov Gary Gascoigne Department of Public Health Gary.Gascoigne@CDPH.ca.gov