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Glossary

The following are definitions of words related to DER technology and used on this website.

Alternate Name(s) – another name that the facility, system, or project is or has been known by

Ambient Temperature – temperature at nearby international airport

Ancillary Equipment – additional equipment related to a system or project, such as a scrubber or a heat recovery steam generator

Auxillary Load – see Parasitic Load

Azimuth – horizontal angle of solar panels relative to the equator (also see: Tilt)

Black-Start – starting up a DER in the absence of an electric grid (see also Black-start/islanding capability)

Black-Start/Islanding Capability – whether an installation has the capability of black start (startup in the absence of electric grid), and if so, whether it has automatic transition or requires manual start (see also Black-Start)

Capacity Factor – actual electric energy output during a period divided by its potential output if it operated at full nameplate capacity continuously during the same period

Category (Facility) – building type / use main category, as per EIA CBECS, RECS, or MECs definitions. See also Subcategory (Facility)

Characteristic Data – descriptive information about a distributed energy resource, project, system, or the facility housing the resource

Chiller – Exhaust-Fired – whether there is a chiller driven by exhaust from the DER

Chiller – Hot Water Driven – whether there is a chiller driven by hot water from the DER

Chiller – Steam Driven – whether there is a chiller driven by steam from the DER

CHP – see Combined Heat and Power

Combined Heat and Power (CHP) – simultaneous generation of thermal and electrical energy from a single fuel source

CHP Efficiency – total useful energy (electric plus thermal) generated during a period divided by the total energy input during the same period. Also called fuel conversion efficiency (FCE). Uses a higher heating value (HHV) of 1,032 Btu/cf for natural gas and 600 Btu/cf for biogas. See also Rated CHP Efficiency.

Commercial Operation Date – date on which a DER project is substantially complete and commercially operable

ConEd Target Zone – whether the facility received an incentive for being in a ConEd target zone as of the time of commissioning

Critical Facility – whether the facility is designated as a "Critical Facility" by NYSERDA, which is decided on a case-by-case basis for a given project

DE Resource – a group of identical distributed energy resource units. For CHP, this is a group of resource units with a specific model number, using catalog model if available.

DER Exhaust Heat Recovery – whether exhaust heat recovery exists for any of the DERs within the project. Direct use of exhaust only.

DER Hot Water Heat Recovery – whether hot water heat recovery exists for any of the DERs within the project

DER Primary Fuel Type – primary type of fuel consumed by the DER

DER Prime Mover Type – type of prime mover

DER Rated Capacity per DER Unit Model (kW) – installed capacity in kW of one DER unit model

DER Rated Capacity per DER Unit Model (kWh) – installed capacity in kWh of one DER unit model

DER Rated Heat Recovery – Exhaust (Mbtu/h) – rated exhaust heat recovery for engine

DER Rated Heat Recovery – Hot Water (Mbtu/h) – rated hot water heat recovery for engine

DER Rated Heat Recovery – Steam (Mbtu/h) – rated steam heat recovery for engine

DER Steam Heat Recovery – whether steam heat recovery exists for any of the DERs within the project

DER Technology – type of distributed energy resource technology

DER Unit Manufacturer – manufacturer of the DER

DER Unit Model – model of the DER (catalog model if applicable)

Developer/Installer Name – name of the company that developed and/or installed the project. For CHP installations that use the catalog, this is the vendor name.

Electric Efficiency – useful electric energy generated during a period divided by the total energy input to the generator during the same period. Uses a higher heating value (HHV) of 1,032 Btu/cf for natural gas and 600 Btu/cf for biogas. See also Rated Electric Efficiency.

Electric Utility – electric utility the facility is interconnected with

Electricity Charged– electricity charged to an energy storage resource

Electricity Discharged– electricity discharged from an energy storage resource

Electricity Generated – electricity generated by the distributed energy resource project

Energy Storage System (ESS) – distributed energy resource that can charge, store, and discharge energy

ESS – See Energy Storage System

Facility – a physical building, or group of buildings, or address, at which a DER project or projects is (are) installed. "Facility" is defined by location. One or more projects may be located at a facility. See also DE Resource, Project, System.

Facility Address – physical address of the facility the DER project is installed at

Facility Category – see Category (Facility)

Facility Latitude and Longitude – see Latitude and Longitude (Facility)

Facility Name – name of building or facility

Facility Subcategory – see Subcategory (Facility)

FCE – see CHP Efficiency

Floor Area (Facility) – floor area of facility in square feet as supplied by program applicant

Fuel Consumed – fuel consumed by the distributed energy resource project to generate electricity and/or heat

Fuel Conversion Efficiency (FCE) – see CHP efficiency

Gas Utility – natural gas utility the facility is interconnected with

Generation Capacity

Generator Type – type of generator and whether it has an inverter

Grid Export Capability – whether the installation is permitted and able to export excess power at any given moment to the electric grid

Gross Energy or Power – total energy or power generated or able to be generated by a DER unit, project, or system, before any parasitic loads are removed. See also Net Energy or Power, Parasitic Loads.

Heat Recovery – capturing heat from an electric generator, exhaust, or industrial processes and redirecting to useful means

Heat Recovery Loads Met – Chiller – whether heat recovered from a DER is used to help meet chiller loads

Heat Recovery Loads Met – DHW – whether heat recovered from a DER is used to help meet DHW loads

Heat Recovery Loads Met – Other – whether heat recovered from a DER is used to help meet loads other than DHW, space heat, and chiller

Heat Recovery Loads Met – Space Heat – whether heat recovered from a DER is used to help meet space heating loads

Heat Rejected – heat generated by the distributed energy resource project that is unused (i.e. rejected)

Heat Used – heat generated by the distributed energy resource project that is used on site

Higher Heating Value (HHV) – amount of heat released by combustion, taking into account the latent heat of vaporization of water in the combustion products

Installation Location – where the DER is installed relative to the facility

Islanding – operating a DER in the absence of or separate from the electric grid

Latitude and Longitude (Facility) – map coordinate location of facility

Located in Flood Plain – whether the facility is situated in the 100-year flood plain

Monitoring Data End Date – date of last data point in the database

Monitoring Data Start Date – date of first complete data provided to NYSERDA. E.g. power, gas, and heat recovery for applicable sites. Partial data may be available on this website before this date.

Net Energy or Power – total energy or power generated or able to be generated by a DER unit, project, or system, once any parasitic loads are removed. See also Gross Energy or Power, Parasitic Loads.

Number of DER Unit Models – see Quantity of DER Unit Models

Number of Occupancy Units – see Quantity of Occupancy Units

NYISO Zone – New York Independent System Operator NYISO Zone the facility is in.

NYSERDA Contract Name – contract name for the project at NYSERDA

NYSERDA Program – NYSERDA program under which this project was installed

NYSERDA-Funded – whether the project received funding from NYSERDA

Parasitic Load – load that powers or controls the DER, for example circulating pumps, heat rejection, fans. Also known as auxiliary load.

Primary Fuel – main fuel source for the distributed energy resource

Project – one or more DE Resources installed and commissioned at or around the same time. See also DE Resource, System, Facility.

Quantity of DER Unit Models – number of the DER Unit Model within the project

Quantity of Occupancy Units – number of apartments (multifamily residential buildings), guest rooms (hotels), or beds (assisted living, nursing homes, and hospitals)

Quantity of Prime Movers – number of individual prime movers in the project

Rated CHP Efficiency (% HHV) – manufacturer rating of total CHP fuel conversion efficiency of the DER, based on higher heating value. For CHP and fuel cells, the higher heating value of natural gas used on this website is 1032 Btu/cf. See also CHP Efficiency.

Rated Cooling Energy Discharge Capacity (ton) – manufacturer rating of the rate that cooling energy can be delivered from an energy storage resource to a load

Rated Cooling Energy Storage Capacity (ton-hour) – manufacturer rating of the total cooling energy that can be stored in an energy storage resource

Rated Electric Discharge Capacity (kW) – manufacturer rating of the electric power that can be delivered from an energy storage resource or project to the grid or to a load

Rated Electric Efficiency (% HHV) – manufacturer rating of electric efficiency of the DER, based on higher heating value. For CHP and fuel cells, the higher heating value of natural gas used is 1032 Btu/cf. For ADG, the higher heating value of digester gas used is 600 Btu/cf. See also Electric Efficiency.

Rated Electric Generation (kW) – manufacturer rating of the electric power that can be generated by a generation resource under constant conditions. May be provided as gross or net (of parasitic power).

Rated Electric Storage Capacity (kWh) – manufacturer rating of the electric energy that can be stored by an energy storage resource

Rated Heat Generation (MBtu/h) – manufacturer rating of the rate that thermal energy can be delivered to a load from a generation resource

Rated Thermal Energy Discharge Capacity (MBtu/h) – manufacturer rating of the rate that thermal energy can be delivered to a load from an energy storage resource

Rated Thermal Energy Storage Capacity (MBtu) – manufacturer rating of the total energy able to be stored in an energy storage resource.

Redundancy (N+1) – whether a project is classified to have system redundancy (i.e., N+1). This means that there is one extra redundant unit that is not used under normal conditions. However, the units are often rotated in and out of service.

Rejected Heat – see Heat Rejected

Scrubber Type – type of gas scrubber included in an ADG system or project

Subcategory (Facility) – building type / use subcategory. See also Category (Facility)

System – a group of projects that are considered to operate as one system. E.g. a solar PV / battery hybrid system, a microgrid, or a solar PV system that is built in stages.

Thermal Efficiency – useful thermal energy generated during a period divided by the total energy input during the same period of time. Uses a higher heating value (HHV) of 1,032 Btu/cf for natural gas and 600 Btu/cf for biogas.

Tilt – tilt elevation of solar panels from horizontal. See also Azimuth.

Useful Heat – see Heat Used

Value Stream – activity creating a flow of value. For energy storage resources, value streams either decrease energy bills or increase income.