Analysis of Improved Reference Design for a Nuclear-Driven High Temperature Electrolysis Hydrogen Production Plant

Conference · Tue Jun 01 04:00:00 EDT 2010

OSTI ID:980791

Harvego, Edwin A; O'Brien, James E; McKellar, Michael G

The use of High Temperature Electrolysis (HTE) for the efficient production of hydrogen without the greenhouse gas emissions associated with conventional fossil-fuel hydrogen production techniques has been under investigation at the Idaho National Engineering Laboratory (INL) for the last several years. The activities at the INL have included the development, testing and analysis of large numbers of solid oxide electrolysis cells, and the analyses of potential plant designs for large scale production of hydrogen using an advanced Very-High Temperature Reactor (VHTR) to provide the process heat and electricity to drive the electrolysis process. The results of these system analyses, using the UniSim process analysis software, have shown that the HTE process, when coupled to a VHTR capable of operating at reactor outlet temperatures of 800 °C to 950 °C, has the potential to produce the large quantities of hydrogen needed to meet future energy and transportation needs with hydrogen production efficiencies in excess of 50%. In addition, economic analyses performed on the INL reference plant design, optimized to maximize the hydrogen production rate for a 600 MWt VHTR, have shown that a large nuclear-driven HTE hydrogen production plant can to be economically competitive with conventional hydrogen production processes, particularly when the penalties associated with greenhouse gas emissions are considered. The results of this research led to the selection in 2009 of HTE as the preferred concept in the U.S. Department of Energy (DOE) hydrogen technology down-selection process. However, the down-selection process, along with continued technical assessments at the INL, has resulted in a number of proposed modifications and refinements to improve the original INL reference HTE design. These modifications include changes in plant configuration, operating conditions and individual component designs. This paper describes the resulting new INL reference design and presents results of system analyses performed to optimize the design and to determine required plant performance and operating conditions.

• Research Organization: Idaho National Laboratory (INL)
• Sponsoring Organization: DOE - NE
• DOE Contract Number: AC07-05ID14517
• OSTI ID: 980791
• Report Number(s): INL/CON-09-17477
• Country of Publication: United States
• Language: English

Related Subjects

08 HYDROGEN
CONFIGURATION
DESIGN
ECONOMICS
ELECTRICITY
ELECTROLYSIS
GREENHOUSE GASES
HYDROGEN
HYDROGEN PRODUCTION
High Temperature Electrolysis
Hydrogen Production
INEEL
INTERSTITIAL HYDROGEN GENERATION
MANAGEMENT
MODIFICATIONS
OXIDES
PERFORMANCE
PROCESS HEAT
PRODUCTION
SAFETY
TESTING
Very High Temperature Reactor (VHTR)