Guidebook for Deploying Zero-Emission Transit Buses (2021) / Chapter Skim
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D-1 Appendix D Glossary Term Definition Acceptance Testing Procedure to identify defects that have become apparent between the time of equipment release and delivery to the transit agency, and to ensure that all contractual requirements for bus and charging or fueling infrastructure have been met. Air Balance Test Process by which the performance of HVAC airflow is measured.
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D-2 Guidebook for Deploying Zero-Emission Transit Buses Term Definition Availability Measure of how often a bus was able to be put into service. The National Renewable Energy Laboratory (NREL)
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D-3 Term Definition Charge Modeling Recommended component of a BEB performance evaluation to understand the capabilities and limitations of charging scenarios. Charge modeling evaluates the effectiveness of planned charging windows, based on the specifications of the bus and charging equipment, as well as a transit agency's service plan and electricity rate schedule.
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D-4 Guidebook for Deploying Zero-Emission Transit Buses Term Definition Curb Weight Weight of vehicle, including maximum fuel, oil and coolant; and all equipment required for operation and required in a technical specification, but without passengers or driver. Deadhead Operation Non-revenue time when a bus is not carrying passengers, usually a trip from, to, or between lines or garages.
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D-5 Term Definition Electrolysis Method to produce hydrogen where electricity is used to split water into hydrogen and oxygen using an electrolyzer. Energy Quantity of work, measured in kWh for ZEBs.
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D-6 Guidebook for Deploying Zero-Emission Transit Buses Term Definition Fuel Cell Electric Bus Zero-emission bus that utilizes onboard hydrogen storage, a fuel cell system, and batteries. The fuel cell uses hydrogen to produce electricity, with the waste products of heat and water.
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D-7 Term Definition OEM-Advertised Range Total possible vehicle range reported by the bus manufacturer. This range may not reflect the range a transit agency could expect in regular transit service.
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D-8 Guidebook for Deploying Zero-Emission Transit Buses Term Definition Pre-Delivery Inspection Your on-site inspector will conduct a final review of the completed bus before the OEM can release the bus to be shipped to your property. Transit agencies may elect to have the staff managing the ZEB procurement along with a ZEB bus expert visit the OEM prior to article completion to review the manufacturing processes and ensure that the bus meets quality standards and specifications.
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D-9 Term Definition Technical Specifications Critical component of bus and charging or hydrogen fueling infrastructure procurements that define technical and performance requirements that satisfy your service needs within the constraints of your operating conditions. Tiered (or Step)
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D-10 Guidebook for Deploying Zero-Emission Transit Buses Term Definition Zero-Emission Vehicle A vehicle that emits no tailpipe emissions from the onboard source of power. Well-to-wheel Emissions Quantity of greenhouse gas or other harmful emissions that includes emissions from energy use and emissions from vehicle operation.
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