General Energy Use, Strategies and Systems

Energy Use:

The design utilizes ground-source heat pumps to satisfy 100% of the building's heating requirement and natural ventilation in the atrium.

Energy Strategies:

A ground-source vertical-well heat pump system provides the building's entire heating load and an equivalent amount of cooling, depending on the annual energy balance. Air-source heat pumps provide the remainder of the cooling requirement and are used to balance the extraction/rejection of heat from the ground. The air-side system consists of a dedicated outside air unit with a total energy recovery heat wheel to precondition the outside air and fan-coil units within the spaces to provide heating and cooling, thereby completely decoupling space conditioning from ventilation. Aggressive internal load reduction, filtered fume hoods, and natural ventilation are also employed to reduce the energy consumption of the building.

Zero Net Energy Definition Used Site Energy Use

Monthly Energy Data and Utilities

Energy Data Type:
Electric Utility:
National Grid
Gas Utility:
Liberty Gas
Other purchased Fuels:

Gas is not used to power the building. It is available for the back-up boiler, emergency generator, back-up hot water, and laboratory use.

Datasets and utility bills sources and reliability:

Utility consumption will be metered via the BAS which contains points for all the utility meters and submeters installed in the building. Reliability is high.

Renewables and Energy Balance

Renewable Energy Sources:
Renewable energy is generated within the building footprint (e.g. solar PV on the roof), Renewable energy is generated on-site but not on the building (e.g. wind turbine in the parking lot)
Renewable Energy System Description & Details
Roof PV: 50 kW ballasted crystalline silicon array expected to produced 65,000 kWh annually Site PV: 3.2 MW DC, 2.0 MW AC expected to produce 4,200,000 kWh annually, 20% of which will be consumed by the new building. Geothermal: 150 ton Multistack chiller with heat recovery ability Solar hot water: 6 Kingspan panels at 10,000 Btu/h each produce 100% of the domestic hot water demand
Annual renewable energy generated 900,000 kWh
Annual Renewable Energy Generated Data Type Modeled
Power Rating Renewable Energy System Type(s) Source of Annual Production Data
3,250,000Watts Photovoltaics, Geothermal, Other Electricity generation of both the roof and site PV arrays is metered at the inverter for each. Energy extraction and rejection of the geothermal system is monitored via BTU meters tied to the BAS.

Annual Energy Import/Export

Electricity amount (imported from grid) 185,250 kWh/year
Electricity amount (credited or exported to grid) 185,250 kWh/year