The Road to Zero: State Zero Net Energy Buildings · Green California Summit – April 26, 2017...

The Road to Zero: State Zero Net Energy Buildings

Green California Summit – Sacramento, CA April 26, 2017

Green California Summit – 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

CDCR, 44%

DGS, 15% DOT, 7%

DSH, 6%

DPR, 6%

DDS, 3%

CMD, 3%

CDVA, 2%

ALL OTHERS, 13%

• 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%)


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 COST TDV


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

http://energy.gov/sites/prod/files/2015/09/f26/bto_common_definition_zero_energy_buildings_093015.pdf


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

155 kBtu/sq. ft. Source EUI

65 kBtu/sq. ft. Source EUI


CALottery Santa Fe Springs District Office


• 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

ZNE for Existing Buildings


• Energy Efficiency First • Energy Use Intensity

Targets (Source EUI) • Top 25% • Based on 2015 state

energy use data

• 34 State Building Types & Various Occupancies

• Variations for 16

Climate Zones

State Building Types & Occupancies • Adult Education -

CCC • Office - Average All

Types • Other - CalTrans

maintenance • Other - Education

• College/University • Office - Large >50K sq. ft. • Other - Caltrans TMC • Other - Entertainment

public

• Data Center • Office - Small <50K sq. ft. - CHP • Other - CDFA • Other -

Lodging/Residential • Fire Station -

CALFIRE • Office - Small <50K

sq. ft. - CMD • Other - CDFW ecolog.

reserve • Other - Specialty

Hospital (DSH)

• K-12 School • Office - Small <50K sq. ft. - DMV

• Other - CDFW fish hatchery

• Outpatient Rehab/Phys - (DSH)

• Laboratory • Office - Small <50K sq. ft. - EDD

• Other - CDFW wildlife area

• Prison/Incarceration - CDCR

• Library • Office - Other Small <50K sq. ft.

• Other - DPR park structures

• Residence Hall/dorm - CALFIRE

• Mixed Use Property (CALFIRE)

• Non-Refrigerated Warehouse

• Other - DWR maint. & subctr.

• Senior Care Facility – CalVet

• Multi-family Housing • Other - HCD migrant centers


Energy Efficiency Targets for Existing State Buildings (Source EUI)


• Energy Efficiency Retrofits • Electrical Systems (lighting/power) • Mechanical systems • Building Envelope • Water Systems

• Alternative Financing Options • State Agencies:

o DGS energy revolving fund o GS $Mart Loans

• Utilities: o On-bill financing, Incentives

• Energy Service Companies (ESCo’s)

Improving Building Energy Efficiency

CHP Academy, West Sacramento


1. On-site Generation 2. Campus

Renewable Energy Generation Priority

DMV Fresno Field Office – First State ZNE Building


2. Campus Renewable Energy Generation Priority


Renewable Energy Generation Priority 3. Portfolio


4. Community

Renewable Energy Generation Priority


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


• 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

Upcoming ZNE Management Memo

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

Lights 26%

Plug Loads (Misc. Equip.)

24%

Mechanical / HVAC 50%

Domestic Hot Water 5%

Ventilation Fans 9%

Pumps & Aux. 2%

Space Cooling 5%

Space Heating 29%


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.


Available Resources • Rebates through the Utility

Company ⁻ PG&E

• 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


Mechanical 50% of total energy use

• Chiller Replacement ⁻ 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

Name Title

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

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 Challenging Site for ZNE

CDPH Richmond Campus Solar Project

https://www.youtube.com/watch?v=T3irM--aE84&feature=youtu.be

https://www.youtube.com/watch?v=T3irM--aE84&feature=youtu.be

Dan Burgoyne Department of General Services [email protected]

Questions & Contact Info

Gary Gascoigne Department of Public Health

[email protected]

mailto:[email protected]

mailto:[email protected]

The Road to Zero: State Zero Net Energy Buildings · Green California Summit – April 26, 2017...

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