Embed Size (px)
Citation preview
Tampa Convention Center • Tampa, Florida
Net Zero Energy:Federal Campuses, New Buildings, & Existing
Buildings
Federal Net Zero Design-Energy, Water, and Waste
Kim M. FowlerPacific Northwest National Laboratory
August 16, 2017
Energy Exchange: Connect • Collaborate • Conserve
Net Zero Boundaries: Fence-to-Fence Campus
Energy Exchange: Connect • Collaborate • Conserve
Net Zero Boundaries: Designated Campus
Energy Exchange: Connect • Collaborate • Conserve
Net Zero Boundaries: Building
Energy Exchange: Connect • Collaborate • Conserve
• A net zero energy Federal building (constructed, renovated, or existing) is operated to maximize energy efficiency, implement energy recovery opportunities where feasible, and balance the actual annual source energy consumption with on-site renewable energy generation.
• A net zero energy Federal campus reduces overall energy use, maximizes efficiency, implements energy recovery and cogeneration opportunities, and then offsets the remaining demand with the production of renewable energy from on-site sources, such that the campus produces as much renewable energy as it uses over the course of a year.
Net Zero Energy Definitions
Connect & Coordinate Design Construction Operation
Existing Federal BuildingsNew Federal Buildings
Federal Campuses
Energy Exchange: Connect • Collaborate • Conserve6
Net Zero Energy
Energy Exchange: Connect • Collaborate • Conserve
Site Energy vs. Source Energy
For every unit of energy consumed at the site, apply the conversion factor for each energy type to determine the source energy required.
Source energy includes all energy used in the extraction, processing, generation, and transportation of each site energy type.
Campus / Building Boundary
3.15x Imported Grid Electricity
Natural Gas
Fuel Oil
Propane
Steam
Hot Water
Chilled Water
Coal / Other
Exported Renewable Electricity
1.09x
1.19x
1.15x
1.45x
1.35x
1.04x
1.05x
3.15x
Energy Exchange: Connect • Collaborate • Conserve
Net Zero Energy Connect and Coordinate
Connect &Coordinate
Consolidate functions to reduce building footprint
Review / develop Campus Master Plan
Consider Central Heating / Cooling plants & Cogeneration
Implement campus-wide energy management systems
Coordinate with utility providers
Energy Exchange: Connect • Collaborate • Conserve
Net Zero Energy Design
DesignDesign buildings to meet or exceed Campus Master Plan expectations
Measure campus annual energy use
Design renewable energy system(s) to meet calculated campus annual energy use
Energy Exchange: Connect • Collaborate • Conserve
Net Zero Energy Design Considerations
High performance design options
Considerations
Siting & Orientation Site and orient the building to allow for passive solar design, optimize shading, and allow for on-site renewable energy generation.
Building EnvelopeMinimize energy loss and attain appropriate solar gain with air barriers, the window-to-wall ratio, and insulation levels.
HVAC Equipment
Right-size best-in-class HVAC system with local or zone controls that leverages efficient design elements.District-energy ready designs allow for thermal energy deliver to the building, minimizing the footprint of building mechanical rooms and HVAC equipment.
Lighting Optimize daylighting potential, specify LED lighting, and use sensors (daylighting, occupancy) and lighting controls.
Controls Use a building control system to monitor and control HVAC, lighting, and renewable energy generation systems. Consider integration with campus control systems.
Miscellaneous Load Evaluate expected plug and process loads, and then reduce to the maximum extent possible.
Energy Exchange: Connect • Collaborate • Conserve
Energy Efficiency MeasuresStrategy ConsiderationsEnergy audit Conduct detailed energy audits to identify energy conservation and efficiency
improvement opportunities. Examine key building energy uses such as lighting, heating, ventilation, and air conditioning (HVAC) systems, building control systems, building envelope, hot water use, appliances, plug loads, industrial equipment, food service equipment, and site infrastructure such as street and parking lot lights, considering occupant behavior.
Benchmarking Benchmark the building’s energy performance using ENERGY STAR Portfolio Manager® to understand the building’s energy performance potential.
Energy modeling Build an energy model of the building to evaluate the investment value of various conservation and efficiency measures.
Third party financing
Explore a performance contract such as an energy savings performance contract (ESPC) or utility energy services contract (UESC) where the private sector or utility helps determine potential savings and energy conservation measures.
Control system Install and use a building automation system to manage building equipment schedules and temperature settings
Fuel switching Consider switching between energy types or sources when selecting efficiency upgrades. For example, heat pumps could be powered with renewable electricity in place of natural gas heating systems.
Energy Exchange: Connect • Collaborate • Conserve
Net Zero Energy Construction
ConstructionContract language for net zero related features
Commission, recommission, or retrocommission energy systems
Energy Exchange: Connect • Collaborate • Conserve
Net Zero Energy Operation
OperationCampus Operation Plan addresses O&M of energy efficiency design features and renewable energy systems
Meter energy use and benchmark performance
Occupants are engaged with achieving the expected energy performance
Measure and verify the campus is operating at net zero over a one-year timeframe
Energy Exchange: Connect • Collaborate • Conserve
Net Zero Energy Implementation for Campuses
DesignDesign buildings to meet or exceed Campus Master Plan expectations
Measure campus annual energy use
Design renewable energy system(s) to meet calculated campus annual energy use
ConstructionContract language for net zero related features
Commission, recommission, or retrocommission energy systems
OperationCampus Operation Plan addresses O&M of energy efficiency design features and renewable energy systems
Meter energy use and benchmark performance
Occupants are engaged with achieving the expected energy performance
Measure and verify the campus is operating at net zero over a one-year timeframe
Connect &Coordinate
Consolidate functions to reduce building footprint
Review / develop Campus Master Plan
Consider Central Heating / Cooling plants & Cogeneration
Implement campus-wide energy management systems
Coordinate with utility providers
Energy Exchange: Connect • Collaborate • Conserve
https://energy.gov/eere/femp/downloads/federal-new-buildings-handbook-net-zero-energy-water-and-waste
15
Net Zero Handbooks
Tampa Convention Center • Tampa, Florida
Kim M. FowlerPacific Northwest National Laboratory
Federal Net Zero Design-Energy, Water, and Waste
