05-02-2013, 11:20 AM
Hybrid Renewable Energy Systems
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Hybrid Systems Definition
• Hybrid power systems combine two or more
energy conversion devices, or two or more fuels
for the same device, that when integrated,
overcome limitations inherent in either.
• Hybrid systems can address limitations in terms of
fuel flexibility, efficiency, reliability, emissions
and / or economics.
Distributed Hybrid Systems Definition
Characteristics of Distributed Energy Resources:
• Located at or near Point of Use
• Locational Value
• Distribution Voltage
Value Proposition – Higher Efficiency
Incorporating heat, power, and highly-efficient devices
(fuel cells, advanced materials, cooling systems, etc.) can
increase overall efficiency and conserve energy for a
hybrid system when compared with individual
technologies.
Evaluating an OPT Hybrids Program
• Assemble Team
• Inventory DOE activities
• Identify potential hybrid combinations (the matrix)
• Evaluate new opportunities for hybrids and identify
R&D needs
• Produce two reports in CY 2001
– Recommendations for Hybrid Power Program
– Report to Congress on Partnerships
Current Hybrid Activities in OPT
• OPT/DOE has been involved in a number of hybrid
system demonstration projects
• Examples:
– Salt River Project demonstration of the Thermal Hybrid
Electric (THE) SunDish
– NREL’s Wales, AK high-penetration Wind/Diesel system
– Dangling Rope Marina PV/Battery/Propane hybrid system
– SEGS CSP/natural-gas-fired power plants in Southern CA
THE SunDish
• 25 kW CSP dish/Stirling engine system
• Provides power during low insolation
by burning liquid or gaseous fuel
– Natural gas
– Hydrogen
– Landfill gas
• Demonstration by Salt River Project
at Pima-Maricopa Indian Community land fill (Phoenix,
AZ) since October 1999
• Benefits of hybrid system:
– Reliable, continuous power maximizing renewable usage
Program Strategy
• Focus on designing, testing, validating, and promoting
optimized DER hybrid power systems for identified
market applications
• Have “market focus”, in contrast with the “technology
focus” of existing technology programs
• Coordinate with technology programs to:
– determine best available technology
– communicate with customers (users) to understand their needs
– conduct systems analyses and produce software tools to optimize
performance
– partner with system integrators to design these features into
products
– test and validate system performance
– promote regional partnerships to encourage deployment