The annexes that appear in Volume II represent supporting technical material
that summarizes the approach sources used for establishing input assumptions,
developing the methodological approach, and organizing the modeling framework. A
brief overview of each appears below, with principal sector analysts in
parentheses.
- Annex I: City
Characteristics – This Annex provides an overview of the spatial,
demographic, and refueling infrastructure information for the four study
CMSAs. It also provides limited summaries of population characteristics for
the USA, which are used for estimates for a national transition. These are
important inputs to the analysis as the study is premised on the use of
hydrogen to meet expected energy demands of an expanding economy, regardless
of carbon constraints (Alison Bailie, Ben Runkle, Bill Dougherty).
- Annex II: Energy
Demand – This Annex provides an overview of the assumptions and
analytical approach used with regard to energy demand for all mobile and
stationary end uses in the study cities and the USA. It also provides a
detailed review of the underlying assumptions and methods used in H2M, the
model developed to analyze the various transitions (Alison Bailie, Chella
Rajan, Bill Dougherty).
- Annex III: Hydrogen
Supply – This Annex provides an overview of the assumptions and
analytical approach used with regard to hydrogen supply in the four study
CMSAs and the USA. Among other things, this Annex addresses how hydrogen
supply is modeled in H2M, feedstock availability constraints for hydrogen
production, cost and performance characteristics of hydrogen production
technologies and pipelines, technology learning assumptions for capital cost
reductions, and upstream feedstock and process fuel inputs for hydrogen
production (Sivan Kartha, Bill Dougherty).
- Annex IV: Fuel Supply
– This Annex provides an overview of the approach used to assess the
characteristics of conventional fuel supply (i.e., all fuels except
hydrogen). Among other things, this Annex addresses how fuel supply to the
demand sectors is treated in H2M, sectoral fuel price estimation
methodology, and upstream fuel cycle inputs for the transport sector (Alison
Bailie, Bill Dougherty).
- Annex V: Electric
Supply – This Annex provides an overview of the approach used to
assess the nature of electric expansion given incremental electricity
requirements associated with a transition to hydrogen. Among other things,
this Annex addresses how electric expansion is treated in H2M, the
modifications made to the NEMS model (2003 version) to account for
alternative assumptions regarding renewable energy cost, performance, and
availability, and upstream fuel inputs associated with electric generation
(Alison Bailie, Ben Runkle, Bill Dougherty.
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